Question about 1986 Chevrolet Corvette

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Tpi corvette runs rough intermintely then fine

New ignition module ,fuel filters plugs ,wires cap.no vacuum leaks .runs fine sometimes.

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  • 108 Answers

EGR sticking or mixture control solenoid on carburator if equipped

Posted on Jun 09, 2014

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6 Suggested Answers

6ya6ya
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Diesel13
  • 11 Answers

SOURCE: 1995 Chevy Cavalier 2.2L Automatic

Check your egr vavle. i had this problem with my old cavalier and it was as easy as removing it and cleaning it. It's probably plugged up with carbon

Posted on Aug 27, 2008

  • 599 Answers

SOURCE: Service Engine Soon Light and Rough Idle (Below 1200 rpms)

do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?

Posted on Oct 07, 2008

  • 24 Answers

SOURCE: astro van wont start

Did you check for spark? Is it getting gas at the fuel rail? If there is no spark then it could possibly be the crank position sensor, ignition module or coils but the coils do not all go bad at the same time.

Posted on Dec 01, 2008

luv2tango
  • 36 Answers

SOURCE: 90 corvette with 22,000 miles running very rough and back firing

Well it sounds like you've started to do your "due diligence", but there are several things left out. Your problem could be many things. Something as minor as a vacuum hose left off, loose, or in the wrong place. And just because you changed the plugs and wires, don't mean you fixed your problem. Open your hood at night and see if you have any sparks "dancing" around. Another way to check this is to open your hood and spray a soapy water solution on your plug wires and look for sparks jumping around. If so replace your wires. You didn't mention what type of wires and plugs you used. I would reccommend NKG platnum plugs and a Bosch wire. I know this from experience,(the hard way teacher). It could even be the gas you are burning. I've owned a lot of Vettes, and I am the kind of guy who believes they should be driven. If not it's like having a beatiful wife and never taking her to bed.I know a lot of people who only drive them "once in awhile". Sitting in thier garage can cause many fuel problems, condensation, sludge in the carb, or filters etc. This can all lead to the problem you are describing.
Low speed miss- usually plugs
High speed miss- usually wires or valves
intermitten miss, fuel or electrical.
I hope I gave you some places to look to find your problem.


Posted on Jul 07, 2009

juncro
  • 467 Answers

SOURCE: 1998 astro sputtering when taking off and while at driving speed

loose vacuum line, check for same, also check the map sensor and the measure the fuel pressure, make sure its at spec

Posted on Jul 29, 2009

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