Question about 1994 Cadillac DeVille

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Hesitation Car studders when attempting to accelerate. Was told it was fuel pump. Question is can the Pump itself be replaced into the existing assembly (Assuming the assembly is not damaged)??.

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Yes, but i'd replace fuel filter first.

Posted on Jan 06, 2009

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1 Answer

Hesitation when accelerate

Fuel filter first thing to check after having contaminated fuel removed. Clogged fuel injectors, crank or cam sensors.

Dec 16, 2013 | Dodge Neon Cars & Trucks

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Where is the fuel filter located on a 2005 Nissan Altima.....also, what are the symptoms of a bad filter or pump?

The fuel filter is located inside the fuel pump on a 2005 nissan altima. The fuel pump is under the back seat. You must remove the bottom cushion on the driver side. Before removing the fuel pump you must remove the negative battery cable and relieve fuel pressure. trouble with filters hesitation in starts could be some bogging and when acceleration poor fuel output but it depends on what ur car is doing?some of these same symptoms could be duel to idle air conrol valve controls idle and hesitation in acceleration

Mar 05, 2010 | 2005 Nissan Altima

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Bogging and hesitation on acceleration iddle is fine

You definitely covered most of the bases. Considering all you've done so far, I would check into the fuel system next. First, how old is the fuel filter? Has it been changed? Yes, a bad filter can cause the problems your having. Next would be the fuel pressure regulator. You need a fuel pressure gauge to check it, which you should be able to rent from a good auto parts store. That will also tell you how good your fuel pump is, i.e. if the pump can deliver the necessary fuel pressure off idle. After that, I would check the injectors themselves for wear or blockage. A bottle of fuel injector cleaner in the gas tank would be a good idea, cheap, quick, and it wont make anything worse. If all that checks out, check your catalytic converter, a clogged or bad cat will also do what your describing. Good luck.

Aug 02, 2009 | 2002 Buick Century

1 Answer

Car starts but turns off try starting car second time it will start with a little gas will run fine. it does this every time when starting car. was told that fuel pressure is low. car accelerates with out...

i would somehow either test the fuel pump and filter and replace the one that is not working, or replace them both. to test the filter you can try to take the filter off and blow through it. if no air comes out the other side, its clogged. for the pump, turn your key until it stops before the engine starts and listen carefully for a hum from by the gas tank. the hum is the fuel pump turnig on; if their is no hum, your fuel pump needs to be replaced.

Jul 19, 2009 | 1996 Pontiac Grand Am

2 Answers

Ihave problem with 92 gmc safari it drives sometimes during driving car buck like it.s out of gas . I'll turn igntion on and off real quick. and car drives ok. Ihave replaced fuel pump.

sounds like a bad plug wire, take a squirt bottle while the car is running then spray the wires down they should start arcing, also when you replaced the fuel pump did you replace the fuel filter

Apr 29, 2009 | 1992 GMC Safari

1 Answer

Hesitation on takoff and on acceleration

it could be one of many things with that many miles on the vehicle. when if ever did you change the fuel pump last? both filter and pump may need to be changed. that's alot of miles remember that. the filter is under the hood on the drivers side mounted on the firewall. under the brake master cylinder. be careful to relieve the fuel pressure before changing it.

Apr 22, 2009 | 2000 Toyota Corolla

2 Answers

My car is not accelerating when I depress the gas pedal

Scott Perry
Owner /Operator
Storm Motor Company Ltd

Its not entirely possible that a low octane level is causing your problem. But highly unlikely. More likely a problem with the fuel delivery sytem of some kind. Possibly a sensor, fuel pump/pressure or a leak (vac/fuel/air) if your getting a engine management light get someone to throw a scanner on it and see if you have any codes that may tell you the problem or give you some clues from the data. Most independants have scanners of some kind now so you dont have to go to bmw. Cost usualy £30 to £70. Have a look round under the bonnet check your vac hosses intake pipes for air leaks or cracks that could be letting in air and giving false readings to maf/map etc. Check plugs to sensors, never rule out the simple stuff. : )

Nov 23, 2008 | 2001 BMW 5 Series

1 Answer

Hesitation on accelearation

Is the car giving you a check engine light? If so you will need to take it to a mechanic to check the codes. Some common causes of hesitation are:

Low fuel pressure - caused by a bad fuel pump or fuel pressure regulator

EGR valve - make sure the EGR valve is working properly. You can test it with a vacuum pump and make sure it holds air. Also you could have a plugged EGR passage.

Good luck and keep me posted. Thanks - Tech101

Jun 24, 2008 | 2001 Subaru Outback

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