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1990 chevy lumina starts, runs rough, stalls when you accelerate, new injectors, new idle air valve, no vacuum leaks

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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eitan
  • 291 Answers

SOURCE: Rough idle

Jeep has been having a problem with this. i take it u have a 4.7L or a 3.7L. when the when to fix this problem they should of replaced all the valves (intake and exhaust). theres a tsb on this and the dealer can look it up. even if you paid for the service they will fix it for free cuz it wasn't fixed the first time. take it back to the them and tell the to read the tsb and fix it right.

Posted on May 15, 2008

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volvo2103
  • 122 Answers

SOURCE: 2005 Jeep wrangler w/rough idle and hesitates when you accelerate

try fuel injectors....run a bottle or two with full tank through it and see if that dont solve the problemo.....

Posted on Feb 01, 2009

countrysi248
  • 443 Answers

SOURCE: rough idle, backfire on acceleration

check everything you can under the hood your air intake system all of it especially make sure all clamps are tight .. and make sure all vacuum hoses are good and not cracking or broken or just loose . you might run a little fuel cleaner through a tank of gas too cleaning the engine fuel system up some. just a few ideas.. Jerry

Posted on Apr 12, 2009

dennymulford
  • 1055 Answers

SOURCE: 1998 GMC Sierra- runs rough then stalls when

had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Posted on Jun 06, 2009

  • 12 Answers

SOURCE: 99 chevy silverado running rough and stalling.

the problem you are discribing would lead me to belive your fuel filter is clogged which is a simple fix 3 dollar part at any part store or on the worse hand your fuel pump itself could be weak you can open the gas tank cover and have another person turn the truck key to the on position without going far enough to start you will hear a faint whining noise if it is going bad or a louder noise if it is fine Good Luck

Posted on Mar 03, 2010

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1 Answer

3.9 engine is idling rough but smooth when accelerating or driving. If I put in neutral it's still rough. Have 250000 thinking maybe injectors? Or where do I start?


Take an have diagnostics run . Could be a vacuum leak , mass air flow sensor problem , If fuel injector's where the problem it wouldn't smooth out while accelerating > Have fuel trims check , O2sensors . EGR valve stuck open a little . If the check engine light was on an had a random misfire code P0300 could be fuel injector. or a specific cylinder misfire.

Oct 02, 2016 | Cars & Trucks

1 Answer

1995 chevy tahoe 4wd. 5.7 liter when cooled down, starting is normal . Right after, engine almost stalls but Idle air control kicks in and keeps it running. eventually it is idling but rouph. On...


If your vehicle has one, and I think it does, check your EGR system. If the egr valve is full of carbon, it can be partially open, creating a vacuum leak. If the egr valve solenoid is bad, it could be opening the valve at the wrong time, also creating a vacuum leak. Unplug the egr vacuum hose, plug the open end of the hose and start it and see what it does. A picture of the egr is below.
3_11_2017_5_29_14_am.jpg

Mar 11, 2017 | 1995 Chevrolet Tahoe

2 Answers

Changed oxygen censor, new plug and wires, new coils, cleaned the egr valve nothing worked still kinda revs up and slows down and stalls occasional haven't tried the sledge hammer yet


Fuel pressure regulator can do this. Also bad fuel pump could. Is it getting good pressure out tailpipe? Maybe plugged catylitic converter?

Aug 25, 2011 | 1990 Chevrolet Lumina

1 Answer

I have a 1990 corolla carburettor. When its at normal operating condition the car jumps and runs rough. When you accelerate the car runs well. It only plays up when at idle. But when cold it runs very...


Check for a malfunctioning EGR valve. This valve is only selected to perform when the engine is warm. It has a vacuum diaphragm which can crack and lead to vacuum leaks. This will cause rough running. The EGR valve should be vacuum checked to see if this diaphragm is leaking. This valve can also stick open due to carbon deposits. When the valve sticks open, the fuel/air mixture is leaned out and rough running ensues. This problem is practically expected on a vehicle of that age.

Mar 21, 2011 | 1990 Toyota Corolla

1 Answer

1990 chevy lumina will not start


COULD BE BAD FUEL INJECTOR.IDLE SPEED TOO LOW.AND A VACUUM LEAK AT THE INTAKE MANIFOLD.SAVE TIME AND MONEY.HAVE CAR SCANNED.LOOK FOR ANY FAULT CODES.

Apr 24, 2010 | 1990 Chevrolet Lumina

3 Answers

91 CHEVY LUMINA IS IDLING VERY HIGH,AND CAT IS TURNING ORANGE,THATS HOW HOT IT GETS


Check for a stuck open EGR valve,it will have to be removed to be checked.Or you have a large vacuum leak,either one will increase idle and fuel causing hot cat and high idle.

Apr 17, 2010 | 1991 Chevrolet Lumina

1 Answer

1990 chevy lumina, idling problem...stalling...too rich


Stalling and running rich. I have seen this before on a Camero. The fuel pump was weak. Not making enough pressure. This caused the fuel injector to DRIP gas instead of SPRAY gas. This caused the fuel to flow into the cylinder in a liquid form, and it did not burn well. We put in a new fuel pump and the car came to life. Good luck.

Dec 27, 2017 | 1990 Chevrolet Lumina

4 Answers

1990 chevy lumina, idling problem... to rich.... stalling......


check egr valve for vacuum leak. pull hose from manifold. put hose in your mouth like a straw and **** on it. if the valve moves, then it's good. if it doesn't, you need a new egr valve. WARNING, they are fricking expensive! auto zone price $204. NO JOKE

Apr 03, 2010 | 1990 Chevrolet Lumina

2 Answers

Rough idle and stalls


sounds like a bad idle air control valve, but if its misfiring thats another ball game,then you may have a bad spark plug or plug wire.when was the last time this car was tuned? if its been a while then you may what to start with a complete tune up, also have the fuel preasure check as this would also cause this problem but if it rides fine and only runs rough at idle then its not the pump.now we are back at a tune up.

Feb 24, 2010 | 1993 Ford Crown Victoria

1 Answer

1990 Lumina running roung, power loss rough idle


On the chevy v6 engines it real comon to have intake leaks.I would try spraing carb cleaner around the intake while the car is running and see if it changes the way it runs.If it does that is your problem.If the intake has a leak it will **** extra air in and cause a missfire.

Mar 03, 2009 | 1990 Chevrolet Lumina APV

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