1994 Chevy Cavalier Strange symptoms

Tiny
94CHEVYGUY
  • MEMBER
  • 1994 CHEVROLET CAVALIER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 215,000 MILES
I've spent countless hours researching my cars' symptoms online and havent found anything that works. Would love to bring it into the shop but I can't afford it so here we go:

Engine starts great and idles for a few minutes just fine. Then after I cruise down the road ussually 5-20 minutes later and come to a complete stop the car will suddenly loose alot of power and start vibrating when accelerating. Then you can smell alot of unburnt gas from the exhaust. The engine surges in and out from running properly as im cruising down the road, sometimes it will run properly for an entire 60 minute drive, othertimes it will start bogging down minutes after start up.
To day I've changed: Spark plugs, Wires, Coil Packs, Fuel Filter and have used Fuel injector cleaner (Pour in gas tank stuff) Checked for codes, None came up.
Wednesday, November 18th, 2009 AT 9:49 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Does the engine always start right back when this happens? Also, have you checked fuel pump pressure and the crank sensor? If you remove a spark plug, is it black, carboned, wet.

Let me know.

Joe
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Tuesday, November 24th, 2009 AT 10:10 PM
Tiny
94CHEVYGUY
  • MEMBER
  • 3 POSTS
Well, the thing is I have to let it sit for around 12-24 hours and then it bangs up great and runs excellent until suddenly, it just starts bogging down and will run like that even after I turn it off and turn it back on. It seems as soon as it gets to operating temperature is when it cuts out and runs like crap (ussually) all the plugs I pulled seemed fine but I still replaced with bosch platinum, even the wires and coils were in good condition. I havent checked the fuel pressure because im not really too sure how to yet (Wasnt expecting it to be the problem) but im going to look into it this weekend. Thanks :)
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Wednesday, November 25th, 2009 AT 9:14 PM

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