Question about 2001 Chevrolet Cavalier

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Cant find the egr valve on my 2001 cavalier dose it have one?

I need to find the egr valve one my 2001 cavy but i have been told that this car dose not have one is this true if so what would cause my car to run fine well idling but under load cause it to stall out and die when it is heated up i have replaced the cat the o2 sensors and the ect sensor. if it makes any difference it hase the 2.2l and it is a 5 speed tranny in it

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Posted on Jan 02, 2017

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SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

its just white cuz i too the cat off..

cuz i thought my proble could have been to do with the cat...

cuz i lost power driving up hills and on highways now it just will start the die right away

or start and idle really bad...

any ideas???

i was thinking crank sensor.. or injectors

Posted on Oct 01, 2008

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SOURCE: 98 Astro Van,when warm hesitating, stalling

WELL YOU CHANGED ALMOST EVERY THING EXCEPT IGNITION CONTROL MODULE........

Posted on Jun 27, 2009

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SOURCE: 1986 corvette running rich at idle, give it gas

have you tried checking the map sensor this can sometimes cause the engine to run oddly. also check for good spark check wires when its pitch black out check for wire arching. also check fuel pressure with a pressure guage.make sure cap and rotor are clean of deposits. keep searching and you will find the weak link.

Posted on Oct 08, 2009

wyotechgrad
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SOURCE: I have a 96 cavalier z24. when I start it up the

See if there is a code in the computer and work from there. Find someone with an OBD2 code reader. If I'm not mistaken an OBD2 code reader works on 1996 and newer models. Could be a bad coil and you don't notice it when you first start it until it idles down, to check for that, while the engine is running, pull each wire off the spark plug, Each time you do that you should hear the engine struggle. Then pick back up once you plug it back to the spark plug. If you pull one and nothing happens to the engine, that could be all or part of the problem. Hope this helps.

Posted on Nov 24, 2009

daves944
  • 1050 Answers

SOURCE: Fails the NO ppm test in 1999 cavalier. Already

A couple of things; you can't have any leaks in the exhaust system, in front of the cat, and you must have the correct mixture going into the engine. The cat must have at least .45% CO going into it in order to reduce NOx. Make sure you have the correct fuel pressure, good fuel filter, and the engine is not running too hot when you take the test. In fact you may want to try a cooler thermostat. The oxygen sensor is only a fuel trim device, the bulk of the systems fuel control is dictated by the MAF and MAP sensor if it has one. Bottom line; your engine is running too lean or there is air getting into the exhaust system before the cat. You may want to try another MAF sensor if you know the other factors are good. If you have access to a gas analyzer, drill a pre-cat hole and check pre-cat CO under load, at least .45% is critical.

Posted on Jul 20, 2010

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2 Answers

I have a 2001 GMC Jimmy 4.3, it surges at low speed but when accelerated runs fine. Any idea what the cause might be?


If EGR comes up, take it off and clean it, see if that clears it up, it may be sticking. Would also clean your throttle body, and replace fuel filter.

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Check for a vacuum leak around the EGR Valve . It is possible the EGR valve stuck open after cleaning it and causing an internal leak now.

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I would highly suspect the "EGR backpressure sensor"
From experience and many conversations, a clooged EGR valve is almost unheard of these day. Get to an auto part store, were they can tell you what problem code(s) your car is getting, and possible good advice.
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90d08d7.jpg http://99intrigue.shutterfly.com/headgasket/97

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Code 402 0n 2001 mazda tribute


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Egr vavle


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