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Running rich and blowing black smoke

Runs rough like it doesnt want to take gas 96 pontiac sunfire

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  • Anonymous Dec 24, 2008

    1995 chevy tahoe 5.7 litre 350 blowing black smoke at start up and idle, but stops after warm up

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Try replaceing the oxygen sensor

Posted on Dec 10, 2008

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2 Answers

How to stop black smoke coming out of the exhaust


Put 93 octane gas in it. If it's blowing black smoke then the valves are really dirty and the 93 octane will clean the intake and exhaust valves off. Make sure and run it almost out of gas so the old gas doesn't mix with the new.

Feb 20, 2015 | Cars & Trucks

1 Answer

Why does my 1988 ford ranger 2.0L is running rough and missing and blowing black smoke


Sounds like it is running rich, could be a stuck injector or a bad water temperature sensor. Is the check engine light on?

Jul 26, 2014 | 1988 Ford Ranger

1 Answer

Hard to start then black smoke out exhaust rough idle


Check the fuel pressure regulator. It may be bad. Pull off the vacuum hose to it and check for any sign of gas in the hose. A busted diaphragm in the regulator could let extra gas into the intake through the vacuum hose. The black smoke indicates it is getting too much gas-running rich.

Jun 12, 2012 | Cars & Trucks

1 Answer

Our sunfire still idles rough and blows black smoke , we just had it tuned up at one shop then a secound shop repleced the EGR valve.


take a good look in daylight,and see if its black smoke or is it blue tint and is the engine useing oil?black smoke indicates lack of [air]check air filter.adrian

Mar 15, 2011 | 1996 Pontiac Sunfire

1 Answer

2000 pontiac sunfire starts only when gas pedal is held to floor, idles rough and white smoke comming to exhaust changed IAC valve..no change


If you have excessive white smoke coming from the vehicles exhaust, it sounds like your headgasket is failing. Especially having a rough idle too. Check your coolant level, does your exhaust smoke smell sweet, like Antifreeze? If so, the gasket has blown. Hope this helps...

Mar 12, 2011 | 2000 Pontiac Sunfire

1 Answer

My 96 sunfire 2.2 l auto idels rough and blows out black smoke when i rev up the motor. i also hesitates on the highwy


Black smoke is from too much fuel, or a mis-firing of the spark plug. Pull all plugs to look to see if one is blackened. If so, this is your troubled cylinder. You can test each spark plug wire with a High energy spark plug tester. If that looks OK, then do a compresion test to see if the mechanical part of the engine seems good.

Oct 08, 2009 | 1996 Pontiac Sunfire

1 Answer

Black smoke when i start engine, very rough idle.


sounds like possible a sensor went bad or is loosly connected. O2 sensor??? Also check the air filter. Sounds like whatever it is, is making the truck run rich----that would be the black smoke.


Hope this helps

Aug 08, 2009 | 1999 Ford Super Duty F 450

1 Answer

Exhaust blows black on ford explorer


look for a vacume leak. black smoke means it is running very rich

Mar 17, 2009 | 1992 Ford Explorer

1 Answer

3.9 v6 4x4 check engine light, runs rough


Replace the ECT sensor.
And letme know. If you feel any diference. ok.

Aug 15, 2008 | 1998 Dodge Dakota

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