Question about 1995 Buick Regal

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Engine seems to be loading up with fuel and won't preform

I live in NE Ohio,I usually let my car warm up,last night when it was cold I let the car warm up for about 15 minutes,when I got into it I could smell raw fuel,also there was no preformance from the engine,it seems to bog down and use an overabundance of fuel.Also my check engine soon light came on.It has 159,000 on it but the preformance has been great up to now.

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It depends on the year model and make of vehicle and the type of fuel delivery system (carburator or injector ignition.). It could also be the EGR valve.

Posted on Jan 19, 2009


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What causes the engine to buck and jump after the engine warms up?

There could be several things that would cause the symptoms.

First thing, is the "service engine soon" light on?

If it is, then you need to get any stored codes to help narrow the possibilities down. It would really be a help to you if you could get a scan tool that will actually show live data.

The reason I say that is, there are sensors which can cause your Buick to run rough, stumble, and belch after it warms up and not "throw a code".

The one sensor I know will do this is the coolant temperature SENSOR.

IF that particular sensor goes bad, it will NOT set off the service engine light, but it will tell the main computer that the engine is colder than it actually is. (It will usually default to tell the computer the engine temperature is -40° . Yup, you read that right. 40 degrees below zero.

When the computer thinks the engine is that cold (whether it's warmed up or not) it will keep the fuel mixture like the engine is cold. Sending signals to the injectors to keep dumping more fuel until the engine is warmed up. Problem is, according to the temp SENSOR, the engine is always cold so the 'puter keeps dumping the fuel to try to get the engine warmed up.

This is only one example and I'm NOT trying to encourage to "fire the parts cannon" at your car (replacing parts in hopes you fix the problem).

What I am trying to get you to do is, even if there is no service engine soon light, is to get someone to hook a scan tool that can read live data on an OBD I (on board diagnosis, 1st generation) to see if there is a sensor not giving the proper information to the computer.

Hope this helps.

Oct 10, 2014 | 1992 Buick Century

1 Answer

2002 yukon denali reduced engine power

could be partially plugged catlyletic converter it will only get worse .could be the egr valve and or the map sensor three things a shop would have to check for you .

Nov 22, 2013 | Cars & Trucks

1 Answer

Hard starting, rough idle when cold, then smooth running when warm

Need year/make/model/mileage of vehicle to provide a more specific set of troubleshooting steps.

When was the last tune up? Hard starts when cold are usually caused by fouled spark plugs, worn plug wires, or weak ignition coils. Fuel systems are not as effected by temperature changes as the ignition components.

Nov 28, 2012 | Cars & Trucks

1 Answer

1996 Chev Blazer 4.3 vortrex. Will not start without priming the throtel body after the truck sits for a while and especially when its cold. Fuel pump was replaced in 2010. I can hear the pump...

I would be considering testing/replacing engine coolant temperature sensor. A faulty sensor can send signal that engine is already warm when it is still cold, thus, less fuel delivery than needed at time of engine being cold.

Dec 29, 2011 | 1996 Chevrolet Blazer

1 Answer

Noise from engine or transmission cant tell

The sound could also be from the fuel pump. This comes on a cold engine. The way to sort it is to change your driving technique. Do not accelerate too much till the temp gauge starts showing the change. for the first minute or two if you do not accelerate too much then you may not hear the sound the rest of the day. Let the engine/fuel pump warm up a little and then you drive your normal self.

Feb 05, 2010 | 2005 Ford Five Hundred

1 Answer

Should I and how would I do an engine flush on a 2001 Cavalier? Oil hasn't been changed in over a year and I live in NE Ohio.

i would not flush. change oil and filter. ck regularly. if it starts to appear nasty change again but you shouldnt have to much of a problem

Oct 24, 2009 | 2001 Chevrolet Cavalier

1 Answer

Couldn't start the engine last night It was towed

Couldn't start .... explain symptoms:
Did starter crank?
was engine warm? cold?

The only symptom you describe is that it started when the engine was cold.

Try this:
Disconnect the battery cables and clean the cable clamps and the battery posts. Car can't start when warm with dirty battery connections (resistance too high). Low resistance when cold.

Sep 30, 2009 | 2001 Ford Expedition

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