Question about 1990 Chevrolet Corvette

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Why is my car running rich on a 1990 corvette

When I start the car it blows out lots of black smoke out of the exust

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: rough running corvette

bad injector

Posted on Sep 24, 2008

emissionwiz
  • 75108 Answers

SOURCE: 1991 chevy lumina will hardly run

DTC - 22 Throttle position sensor error (signal low), is tps connected?
DTC - 23 Intake air temp sensor error (low temp indicated) check and make sure the sensor is connected
DTC - 43 Knock sensor error, ignore this for now, will not cause rich run.
DTC - 53 System voltage too high, check reference voltage from PCM, it should be around 4.5 Volts, this could be the cause of all your problems, the computer will need to replaced almost for sure.

Posted on Oct 06, 2008

  • 2 Answers

SOURCE: 1997 Camaro, Z28 Car is running rich, flooding out and fouling

Depending on how many miles are on the car, I would bet you have a stuck or failed fuel injector, or multiple injectors that are leaking. Check EBAY, there are usually lots on there for sale used. They are very easy to change.

Posted on Mar 12, 2009

SOURCE: 1994 Chevy Astrovan. v6 . Running very rich, black smoke.

If this van uses flow meter? If does, replace it.

Posted on Jul 09, 2009

  • 136 Answers

SOURCE: suddenly has a loss of power and seems to be

either your valve guides an seal are worn or you have a bad o2 sensor and it need replacing.car running like a choked dog huh?!! happenend out of nowhere? probably that sensor it tell how much o2 to fuel to mix to your computer hope this helps

Posted on Nov 24, 2009

Testimonial: "will try and change, thanks for your help, i hope it works too. "

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1 Answer

I STAND CORRECTED, TO RICH AND TO ANSWER YOU YES IT ACTS LIKE IT WANTS TO STALL. ALSO ERROR LITE COMES ON


the temperature sensor often causes symptoms such as this. it incorrectly tells the computer that the engine is cold and needs a rich mixture which results in black smoke and hard starts. another cause for such a condition is fuel injectors that are dribbling rather than atomizing fuel spray.

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Your car is running very rich, meaning the cold start sensor may be blown. a car uses a sensor to see how cold the engine is as the colder the engine the more fuel it needs.

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its obviously running way to rich, a lot of things can cause this problem, is your check engine light on?, what kind of vehicle is it

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The fuel ratio is rich. You are burning excess fuel. Change the air filter to see if that works. If not let me know and ill give you some more info

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Running rich and blowing black smoke


Could be a number of different things.Fuel pressure relief valve not working,injector pulse too long,Is the air box lid securely fastened and air cleaner clean.Are there no leaks between the air box and throttle body(intake tube).Have you checked oxy sensor.air flow meter may be also possible.Try squeezing the flexible fuel hose enough to allow the engine to run and see if the engine reacts better if it does you have excessive fuel pressure.

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