Question about 1993 Chevrolet Cavalier

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Where is egr valve on 1993 chevy cavalier, have rough idle, gas smell like flooding, runs ok @ highway speds

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I have 1995 chevy lumina with the3100 engine. It starts fine but idle is rough and has loss of power and smells like unburnt gas.


How long since overall tune-up? Any applicable trouble codes?
The basics for a rough idle, check for a leak of some kind, fuel--egr--vacuum, something of that nature. Does it run ok off-idle?

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I have a 2004 Chevy Impala. 3.4l v6. About two months ago, the fuel pressure regulator went out, and I forced it home. My mechanic replaced the fuel pressure regulator and said I had an EGR code, so I...


White smoke and foam in the gas tank indicates antifreeze leaking into the engine somewhere. Do you smell antifreeze? You may have an engine seal leaking, most likely head gasket. It may be affecting the various engine sensors.

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93' cavalier, very rough running. Missing badly at all speeds and loads, including at idle in park. changed plugs and no change in symptons. Is this an injected motor (4 cyl)?


Yes it is fuel injected. If it runs but has no power there is a good chance that an ignition coil went bad and there would be no spark to two cylinders. Cylinders 1 and 4 are partners on the same coil and 2 and 3 are partners. Usually these cars if an injector goes bad they have an external leak.
You can try to listen to them by holding a screw driver to each on while its running but I don't think
that will be your problem anyway.Another giveaway for the coil could be a gas smell like it is partially flooded. When you changed the plugs were any of them wet with fuel ? There is also a chance that if the engine works ok at highway speeds that the egr valve is stuck open. This causes
rough running at idle and bad hesitation until highway speed is achieved. Hope this helps or let me know and we'll figure it out.

Paul

Dec 28, 2010 | 1993 Chevrolet Cavalier

2 Answers

1995 safari van w stalls when giving it gas. changed fuel pump and filter. replaced egr valve. sometimes rough idle. when it stalls just like you turned off key. then when you try to start it acts like it...


maybe your iac valve is not working? it takes place of a choke or temp sender to computer could be bad which controls t I.A.C. known as the idle control valve,do you have any codes?

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95 Chevy C-1500 runs rough at idle and during accelleration. OBD-1 code 45. (rich exhaust)Runs ok at highway speed but gas milage seems worse. Replaced coil, cap, rotor, plugs, wires, fuel filter. BG-44K...


Check the vacuum line to the fuel pressure regulator and check to see if the fuel pressure regulator has gone bad. Give the throttle body a good cleaning and the injectors too. Do not use carb cleaner, it's to corrosive for the gaskets used in the throttle body. The other thing too that would cause this is a stuck or bad EGR valve, Try cleaning the EGR valve too since your cleaning the throttle body. Good luck and keep me posted.

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1 Answer

Rough idling when cold


check the choke setting

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1989 Cavalier Z24 3.1 rough idle and hesitation


it sounds to me that the sensor your talking about is the camshaft positioning sensor. It regulates how much fuel you get to your engine, so that is also why you have the fuel smell as well.

Feb 23, 2009 | 1997 Chevrolet Cavalier

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HARD TO START WHEN COLD AND WHEN IT DOES IDLES BAD AND STALLS.


Try replacing the ignition control module it is located under the distributor cap Cost is around $30.

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1989 Cavalier Z24 3.1 rough idle and hesitation


It sounds like you may have a broken exhaust valve spring, although, like you have found out problems like this can be very hard to diagnose, but anyone with a compression tester and couple other tools could find out if this is the case. Hope this gives you another idea where to look.

Sep 29, 2008 | 1989 Chevrolet Cavalier

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