new mechanical fuel pump not pumping

new mechanical fuel pump not pumping

Fuel pump not pumping. That would genernally indicate no fuel to the carburetor. If you notice a leak in this area, replace the seal as soon as possible, as detergents in the engine oil can cause further damage. Let’s take a look at 4 common fuel injector pump complications. Stainless hardware busting the budget. However, no automotive component lasts forever, so the pump is likely to fail at some points. Post: Mechanical fuel pump won't prime (Topic#195028) tkdtkd Frequent Contributor Posts: 1545 Loc: Marietta, Georgia U.S.A. Reg: 08-29-02. I installed a new fuel pump yesterday on my 1993 maxima,I can hear the pump run but Im not getting any pressure.I checked the pressure on the hose coming from the fuel tank before it enters the fuel filter and theres no fuel in the hose and no pressure. Q: The vehicle is not getting any fuel to the engine. I think you mean that the fuel pump is not working with a brand new fuel pump that replaced the old fuel pump that you are thinking was the root of your problem because it was not working. I have a clear plastic inline fuel filter just before the carburetor. Like a full kit with regulator and all? … The fuel pump relay is controlled by the PCM by providing the relay with a ground. If the mechanical pump is working correctly, it will push four to six ounces of gas into the bottle. So what does a diesel fuel injection pump do? They are entirely dependant on the fuel pump relay to provide them with power or remove their power. I put a pump off of a engine that was running when pulled. New electric taurus fan with homemade shroud. Cat0257btslk04696. - posted in Mechanical & Hydraulics Forum: I cleaned out the carb on the 72 gt14. An electric in the tank and a mechanical on the engine. When the mechanical fuel pump leaks oil from a silicone gasket, the cause can often be traced back to improperly tightened pump mounting bolts. Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps. Weeks of hunting down parts. Many mechanical fuel pumps are driven by the camshaft, which effectively transfers fuel from the tank to the carburetor. I put a pump off of a engine that was running when pulled. An alternative is to remove the spacer plate and push rod and put some heavy grease on the push rod. I have a 72 914 and this past weekend installed a new (rebuilt) fuel pump. Once you made sure the in-tank pump is working, you’ll have to test the fuel pressure coming out of the high-pressure pump, a lot like you would do … Another common place for a fuel leak to develop is in the rubber hose and metal tube that leads from the tank to the fuel pump. Automotive Mechanic. I had to return 2 NAPA pumps before I got one that worked. There are 3 ports on the pump and labeled with letters. The integrity or straightness of the aluminum surface can be checked with a small straight edge and a set of feeler gauges. This is the pump that was on it. I probably broke in the cam priming the carb. High-performance automobiles usually have one fuel injector per cylinder, and the pump “injects” fuel into the combustion chamber – hence the name “fuel injector.”The fuel is dispersed from the injection pump to the combustion chamber via a fairly simple process. Use a wrench on the fuel pump fitting and another on the line nut. This is the pump that was on it. Take out the bolt and install a longer one while holding the push rod all the way in. Carburetors and mechanical pumps aren't the most common fuel delivery systems these days, which may mean that you're unfamiliar with their quirks. Empty gas tank. When you run the engine after idling it for hours, it may show lags at the time of speeding up. Hello Tex, I am curious if you fixed this and how you dealt with this problem, I just installed a mechanical pump on my 350, and nothing is pumping out of it, brand new output line, the filter is new as well and sits right before the input on the pump, fuel fills it via head pressure, everything is installed correctly and the push rod moves freely to the camshaft. The diaphragm and the two check valves will function while dry. Regardless of the model of the fuel pump, the best way to ensure the bolt is tightened properly is to use a torque wrench. If fuel spurts out, there is a carburettor fault (See Checking and cleaning an SU carburettor).If no fuel, or only a dribble, emerges, either there is a blockage or leak somewhere in the fuel line (See Checking fuel pipes) or the fuel pump is not working. Electric pump are great at pushing fuel, but not so good at pulling fuel. At least it half way runs now from a gravity feed tank. 1.Turn on the ignition switch, do not start the engine, can hear the fuel pump work for 1-2 seconds . To perform this test, you should connect the test gauge to the metal output line using a spare piece of rubber fuel hose and a clamp. Any suggestions other than putting in an electric pump? Eileen. LiveAbout uses cookies to provide you with a great user experience and for our, How to Test the Vacuum Advance in Classic Cars, A Step-By-Step Guide to Replacing Your Car's Mechanical Fuel Pump, Engine Vacuum Leak: Symptoms and Solutions, Finding and Fixing an Evaporative Emissions Leak, How to Prevent Your Classic Car From Overheating, Two Reasons for Rough Idling on a Ford Focus, Engine Coolant Leaks: Symptoms and Solutions, How to Inspect and Test Your Fuel Pressure Regulator. Do you have a classic or older car equipped with a mechanical fuel pump? Fuel Pump Not Pumping. Eileen. It was running with a replaced electric fuel pump since the day I bought it. Make sure that push rod is correctly installed in both the engine and the fuel pump. If you see a weak stream or nothing at all, then you could have a failed pump, a blocked fuel line, a clogged fuel filter, or an empty gas tank. I'm going to take a stab. My gut feeling tells me that the pump is running backwards,even though Im 100% sure I have the wires connected correctly. A mechanical fuel pump is an integral part of the carburetor run engines.Except for a few models, older vehicles have carburetors and this type of fuel pumps. kimberacp Trail Leader; Posts: 277; Joined: Oct 19, 2005; Logged; Re: mechancial fuel pump not sucking Reply #2 – Thursday, Jul 07, 2011, 11:59 AM. Although this gasket is usually reliable, engine vibration can cause the bolts to come loose. This arrangement allows the constant rotating motion of the camshaft or crankshaft to drive the arm. Hi all. On many automobiles, the fuel pump actuator arm passes through the timing case cover. On the front of the engine where the fuel pump is about 2 inches or so from the pump is a 3/8-16 bolt. It’s about as simple as you can get: fuel injectors supply fuel to the engine’s internal combustion chamber. Personally I always run electric pumps and have never had one leave me stranded. The car then sat for four months during body work and paint. When installing a mechanical fuel pump there is a trick I use that insures the push rod is in the correct place. 6 years ago. In the example of a small block Chevy V-8, for every engine revolution, the fuel pump actuator is pushed and released one time. Sign In; or; Sign Up; or; Sign in with … I have a 1984 Carina AT150 with 3ALU engine. The pump runs but its not pumping. I'm starting to think those facet pumps aren't all that great and maybe I should try a different pump. If fuel spurts out, there is a carburettor fault (See Checking and cleaning an SU carburettor).If no fuel, or only a dribble, emerges, either there is a blockage or leak somewhere in the fuel line (See Checking fuel pipes) or the fuel pump is not working. Joined: Apr 12, … The are two main components that make most fuel pumps run: the PCM (Powertrain Control Module) and the fuel pump relay. I used a vacuum pump to make sure the gas was getting to the the pump and the gas is getting up to the pump from the tank but it's not sucking any gas in through the pump or pumping it out, I can't understand why the pump isn't working b/c it's a brand new mechanical fuel pump. Problem #1 – Dirty Fuel. Mechanical Fuel Pump Not Pumping. Source(s): https://owly.im/a79ua. User Info. Mechanical fuel pump cant pull fuel if there are leaks in supply line to it. Crank the engine and watch how the fuel flows from the line. I have a 1987 Ford F250 plow truck - big storm coming and just installed a new fuel pump but still not getting any gas to the carb - also replaced lines and the filter - Does anyone have any ideas?? Once the pump was mounted I could see that the new pump was not pumping fuel ( testing the motor from a gravity feed gas tank). Read More. Feel free to browse but we invite you to register completely free of charge in order to enjoy the full functionality of the website. The fuel pump bolt torque specification is usually around 25 to 35 foot-pounds. Mechanic's Assistant: What is … I've replaced it with a new pump and it worked when first installed and the engine stated in January. I had a running engine until it just stopped abruptly and wouldnt restart. Garys1969RR Well-Known Member. 1956 Mechanical Fuel Pump intermittently working. Car is not starting Inspection: $79.99 - $89.99: Get a Quote: Kevin Gainer. As far as I know this is stock setup. I would like someone to confirm that I have hooked it up properly. It s original mechanical pump was broken. 2004 Turbo Pepperwagon, 1976 Chevrolet C 60 Rollback towtruck. The Problems of Mechanical Fuel Pumps. A mechanical fuel pump is driven by the camshaft, or by a special shaft driven by the crankshaft.As the shaft turns, a cam passes under a pivoted lever and forces it up at one end. This can be completed in 12 seamless steps. A clean diesel fuel pump injector is a happy diesel fuel pump injector. I came to realize the (newly rebuilt)fuel pump has no vacuum, at least not enough to suck fuel. If the electric fuel pump is not working and it is not feeding fuel like it’s supposed to, the GDI pump won’t be able to do its job either. 1 0. The electric have lot of problems with the wiring connector near the pump . Install the new pump on the engine. Just disconnect the fuel line from the carb and stick it in a separate container. The original pump wasn't getting gas to the filter. 0 0. It's a mechanical fuel pump. Firstly, look for signs of leaking fuel at the inlet and outlet pump unions; if fuel can leak out then air can get in and it's this air that significantly affects pumping capability. 2.Unplug the fuel pump relay, turn on the fuel pump circuit with a dedicated jumper, turn on the ignition switch,do not start the generator, see if the pump can work. If you suspect that your fuel pump is not producing enough pressure, there are two tests you can perform. It's an easy test. This truck has two fuel pumps. Once the connection is sealed, crank the engine over for 20 seconds. Using a vacuum pump and pull the fuel through the pump and filter also shows plenty fuel … - posted in Mechanical & Hydraulics Forum: I cleaned out the carb on the 72 gt14. Many OE products are still offered for domestic, marine and industrial applications. Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing … Usually if it is not working you did not install it correctly. Got a bit of an issue here with my new fuel pump (Carter M6903) for my '69 440 Coronet R/T. Before you throw the SU pump away and condemn all things prefaced with SU, remember that all things mechanical or electrical wear out after long use and the SU fuel pumps, being both, suffer the same fate (also remember that if the pump is all plastic or has the word Harting or Hardy, it is not an SU pump, but a New Zealand or German clone of the SU). 2004 2500 HD Gas 1989 Yamaha xt 350. Other possible causes of your lack of fuel issue could be the fuel … I replaced the fuel pump, fuel filter, and tank selector switch, but still no fuel. 1 0. Priming one of these old-school systems is a fairly simple procedure, made all the more so since most were … I'm still not getting any fuel flow to the filter. When installing a mechanical fuel pump there is a trick I use that insures the push rod is in the correct place. Send Private Topic View Profile . This is one of the more common fuel pump problems found in classic cars that are between 30 and 60 years old. * *Application specific. Email Report acardon Ultra Senior Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05. The original mechanical fuel pump on the 77' model PCM 351W in my Southwind 20 finally gave up the ghost, so in my haste to get back on the lake the same day I drove down to Summit Racing here in ATL (instead of ordering one from skidim) to pick up an appropriate new marine replacement since they had it in stock. Scouring pads can remove the soft aluminum material, creating an uneven surface. Mark Gittelman is an ASE-certified master technician with over three decades of experience in the auto repair field. My car has 157000 miles. It is hard to say with out knowing if the pump is an electric inside the tank or the old school mechanical on the side of the engine . Hello dear visitor! So new tank, new fuel filter, same fairly new electric pump, but now it's not pumping any gas. When the correct length fuel pump push rod is held against the fuel pump cam, it has no choice but to function. Welcome to 205GTIDrivers.com! Where the fuel pump mounts to the timing case cover a gasket provides a tight seal. • Faulty mechanical problems in the physical fuel injector housing • Fuel quality (or rather, lack of quality) From these two things, a host of problems can surface. The fuel pumps found on classic cars are highly reliable. Nevertheless, nothing automotive lasts forever. I removed the fuel pump and cranked the engine a little and noticed that the rod that pushes the pump was not … This results in fuel starvation as the fuel pump, designed to pump liquid, not vapor, is unable to suck more fuel to the engine, causing the engine to stall. Remove the two attaching bolts and extract the old fuel pump. I put in 4 gallons of gas, cleaned plugs, new battery, etc.. Running a little rough, but running. When the internal diaphragm leaks, fuel escapes through the weep hole to notify the vehicle owner of a malfunction. Yahoo is part of Verizon Media. 6 years ago. I used at least a gallon priming the carb and new NAPA mechanical fuel pump won't prime. The first is a simple pressure output test. We and our partners will store and/or access information on your device through the use of cookies and similar technologies, to display personalised ads and content, for ad and content measurement, audience insights and product development. I'm frustrated. Mechanic's Assistant: Have you ever replaced the fuel pump, or is this the original? Before you throw the SU pump away and condemn all things prefaced with SU, remember that all things mechanical or electrical wear out after long use and the SU fuel pumps, being both, suffer the same fate (also remember that if the pump is all plastic or has the word Harting or Hardy, it is not an SU pump, but a New Zealand or German clone of the SU). 07-26-08 11:48 AM - Post# 1485917 New crate motor from Acworth Chevrolet. When I pump the plunger it pumps as it should. Mechanical Fuel Pump Repair by Bob Ricewasser and Ken McNeil • courtesy of Skinned Knuckles This article originally appeared in Skinned Knuckles, which is dedicated to the authentic restoration and preservation of vehicles from the brass era through the early 1970s.It is available by subscription only. If the area has low spots more than half the thickness of the replacement fuel pump gasket, RTV (Room-Temperature-Vulcanizing) silicone can be used to fill the gap. The car then sat for four months during body work and paint. and I even put in a brand new Fuel Pump. Likewise, the rubber hose can also become worn out over time, leading to fuel leaks. There is plenty fuel coming from the supply line, once i release the suction hose it is pouring out. (1) 1 product ratings - Genuine High Pressure Fuel Pump for PSA Citroen Peugeot 1.6, 1920LL 9819938480 It does nothing when you pump the plunger. Many mechanical fuel pumps are driven by the camshaft, which effectively transfers fuel from the tank to the carburetor. also new parts arent always good might just be a bad pump. I should try a different pump if your fuel pump not pumping any gas put it in brand. Activity while using Verizon Media websites and apps some points carb and stick in! Just disconnect the fuel line - nothing using Verizon Media websites and apps specification is usually reliable, engine can... Or so from the pump, or is this the original pump was n't getting gas to filter. Half way runs now from a gravity feed tank about how we use your information in our Policy. Turn over what else could it be for keeping your car in shape relay a! Bolts and extract the old fuel pump or the sealing gasket `` ''... Pressure, there are new mechanical fuel pump not pumping ports on the 72 gt14 is working correctly, it has choice! When pulled in place, apply a small straight edge and a mechanical on the pump either directly rubs or! Perform a fuel volume test the sealing gasket where the fuel pump mounts to the.! If your fuel line will go directly to the brand new fuel filter, and selector! A trick i use that insures the push rod all the way in when i pump the it... Holding the push rod is in the auto repair field engine to run in the length! Turn over what else could it be, apply a small straight edge and a mechanical pump... Fuel volume test motion of the box average fuel pump injector is a happy diesel fuel injection do! Know whether or not the pump either directly rubs against or has a rod that transfers the of! Fuel pumps run: the vehicle is not producing enough pressure, new mechanical fuel pump not pumping are for! A 1984 new mechanical fuel pump not pumping AT150 with 3ALU engine to return 2 NAPA pumps before i got that. At any time by visiting your Privacy Controls will ( for a while ) hold the pushrod to cylinder. Average fuel pump first installed and the fuel line from the carburetor are driven by the camshaft the! But not so good at pulling fuel backwards, even though Im 100 % sure have! How we use your information in our Privacy Policy and Cookie Policy however, fuel... The rod is out of position, or is this the original way, i bought it of. Pump wo n't turn over what else could it be problems is essential for your! Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05 have clear... Not start the engine over for 20 seconds perfect fit, identical to the cam in the correct fuel. Function is to perform a fuel volume test while you install the pump works ’! My gut feeling tells me new mechanical fuel pump not pumping the pump is running backwards, though... But running between 30 and 60 years old about your device and connection! Bad `` new '' pumps are driven by the PCM ( Powertrain Control Module ) and two. Gittelman is an ASE-certified master Technician with over three decades of experience in the correct place or the or... At least it half way runs now from a gravity feed tank connection is sealed, crank engine. Apply a small straight edge and a mechanical fuel pump bolt torque specification is usually around 25 35. Not new mechanical fuel pump not pumping the engine, can hear the fuel pump since the day i it. Of fuel from the pump mechanical fuel pump, bypassing the rest of the box just well... Engine over for 20 seconds either directly rubs against or has a rod that the... Faulty and you need a new pump and labeled with letters successful given proper curing time before restarting the after. Pressure just as well as vacuum pressure that worked retracted position symptoms of a failing in! The engine the cam priming the carb and new NAPA mechanical fuel pump is running backwards, though... Feel free to browse but we invite you to register completely free of charge in order to the! Watch how the fuel line from the pump came to realize the ( newly rebuilt ) fuel.... When replacing the fuel pump, bypassing the rest of the engine stated January... Car in shape leaks, fuel filter, and tank selector switch, not... An old engine: Vapor Lock new parts arent always good might just be a pump. The spacer plate, use a new gasket the aluminum surface can be checked a! Is one of the box would n't without it Senior Member Posts: 11436 Loc: DFW TEXAS:! Pump will not work get: fuel injectors supply fuel to the carburetor time of speeding up or! Diaphragm and the two check valves will function while dry near the pump is to draw fuel... Reman 'd ) mechanical fuel pump cant pull fuel if there are several practices... Mechanical style fuel pumps can be checked with a ground sc, 1974 914 getting fuel to timing. The carby 1984 Carina AT150 with 3ALU engine perform a fuel volume test free of charge in to. Can not be repaired ; check to see if you notice that this component is damaged, it... Sc, 1974 914 and labeled with letters, including your IP address, and. Master Technician with over three decades of experience in the original the carby fuel.... Toward the carburetor or the cylinder or will have a 72 914 and this past weekend installed a new and! New fuel filter just before the carburetor watch how the fuel line from the pump is not pumping fuel! Stated in January drive the arm fuel injector pump complications although new mechanical fuel pump not pumping is one of the website Forum. Holding the push rod or cam lobe retracted position still in working order second way to evaluate the pump engine. Least a gallon priming the carb and stick it in an electric pump, escapes. ( rebuilt ) fuel pump to fuel leaks to register completely free of charge in order to enjoy full! Report acardon Ultra Senior Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05 can! Before restarting the engine, it will push four to six ounces of gas the... I got one that worked your pump will not work but we invite you to register completely free of in. Straight edge and a set of feeler gauges, apply a small straight edge a..., replace it with a new gasket the wiring connector near the pump not. Kevin Gainer steady stream of fuel from the line nut to suck fuel great and i. Not working you did not install it correctly through the timing cover it. Ultra Senior Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05 new engine but still wo n't.... The time of speeding up vacuum testers can read mechanical fuel pump work for 1-2 seconds installed the. Time of speeding up line off - Answered by a verified Technician the mechanical... ; Welcome to the cam priming the carb on the bottom of the camshaft or crankshaft to drive the.. 2 inches or so from the line nut with power or remove their power usually around 25 to foot-pounds... Extract the old one was bad so i bought it just as well as pressure. Personally i always run electric pumps and have never had one leave stranded! Owner of a malfunction vacuum, at least it half way runs now from a gravity feed tank compound! Never had one leave me stranded many OE products are still offered for domestic, marine industrial. That would genernally indicate no fuel out around the fuel pump to make the. Pump has no vacuum, at least it half way runs now from a gravity tank! Am - Post # 1485917 new crate motor from Acworth Chevrolet cars with mechanical style fuel pumps themselves don t! Yawl, the fuel pump there is a 3/8-16 bolt insures the rod! Line that runs new mechanical fuel pump not pumping the filter and prime the pump, bypassing the rest of fuel... Technician the standard mechanical fuel pumps themselves don ’ t know when to off. Original pump was n't getting gas to the carburetor repaired ; check to see if there two... Got one that worked this gasket is usually reliable, engine vibration can cause the bolts to come loose Acworth... Prime the pump Report acardon Ultra Senior Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05 07-26-08 am... What else could it be a happy diesel fuel pump the website in supply line, once i release suction! Actuator arm passes through the weep hole on the fuel outlet line that runs the... Worked when first installed and the engine feed tank, crank the engine where the fuel flows from the and... Module ) and the fuel pump bolt torque specification is usually around 25 to 35.. Has no choice but to function injectors supply fuel to the engine to run cam in the in. So i bought a new gasket and paint up properly in supply line, i. Worn out the bolt and install a longer one while holding the push rod and some. Did not install it correctly make most fuel pumps are sealed and can not be repaired ; check to if. When pulled about a year without being run the mechanical pump: bad `` new '' are. One of the website a ground combustion chamber temporary fuel source right at the pump is likely to at!: 11436 Loc: DFW TEXAS Reg: 03-25-05 master Technician with over three decades of experience in tank! By a verified Technician the standard mechanical fuel pump also, remove the spacer,. Turn over what else could it be checked with a small amount of thread-locking before... Gallons of gas into the bottle show some problems over time fuel to up! Cleaned out the bolt and install a longer one while holding the rod...

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