Question about 1996 Pontiac Firebird

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I have a 1996 pontiac firebird with the 5.7 L it has lost some of the power and smells like fuel and has black smoke on start up. The fuel system has been worked over and there are no codes thinkin maybe cats and or sensors.

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Neither cat nor sensor.
You have a leaky fuel injector (stuck open).
Black smoke is unburt fuel.
Obtain a mechanics Stethoscope (like a doctor's steth, but has a rod onthe end instead of a disc).
You will find the faulty injector quickly.
Best to replace it.
(By the way, white smoke is Water and blue smoke is oil)

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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My 99 Firebird just started running VERY rough , surges , misses, hard to start, black smoke with raw fuel coming out of exaust


Have the codes read... Repost. Want a guess, Injectors stuck open. Black smoke is to much fuel. Could be the pcm died also.

Dec 03, 2016 | 1999 Pontiac Firebird

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1996 pontiac firebird will start up and then it will die . The fuel pump is working.


Well the fuel filter would be an easy choice, but it could be something electrical.
You'll need to figure out if you are missing fuel pressure or spark when it stops running to know how to proceed.

Feb 28, 2014 | 1996 Pontiac Firebird

1 Answer

Have a 1996 firebird with po300 code


PO300 IS A MULTI CYLINDER MISFIRE. PROBALY COIL OR PLUG WIRES, MAYBE PLUGS. JEFF AT "AUTOWORX" (517) 489-1566

Apr 02, 2013 | 1996 Pontiac Firebird

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My 1995 Pontiac firebird (3.4L V-6 Automatic) sputters when load is applied to the motor (slow acceleration) between 1500 and 2200RPM. Above 2200 rpm the car does not bog much at all. From a take off at...


Check fuel pressure regulator for fuel laying in the vacuum line going to the regulator.If it has fuel in it replace regulator. If its ok then check fuel pressure if its not within specs replace pump.

Apr 26, 2011 | Pontiac Firebird Cars & Trucks

1 Answer

1998 pontiac firebird takes a couple of seconds to start. I can hear the fuel pump kick on and cycle. When it is running it runs smooth. Car does not miss. The exhaust smells very bad.


CHANGE THE SPARK PLUGS, OR CHECK TO MAKE SURE THE CATYLITIC CONVERTER ISN'T PLUGGED, AND MAKE SURE THERES OIL, IT COULD BE BURNIN UP. IS THERE BLUE SMOKE, AND ALSO CHECK THE TRANNY FLUID TOO, YOU MIGHT BE SMELLIN OTHER THINGS

Aug 11, 2010 | 1998 Pontiac Firebird

1 Answer

I have a ponak firebird the fuse are goog but there is no power to the fule pump


There is also a fuel pump relay. As you're facing the car, it should be on the right hand side of the engine compartment, possibly in a black box with other relays and fuses.

Oct 26, 2009 | 1996 Pontiac Firebird

1 Answer

My car does not like to start/ stay running


Check the coolant temperature sensor. The thick black smoke is an indication it is flooding or getting to much fuel. The CTS is critical for fuel metering on start up.

Dec 04, 2008 | 1986 Pontiac Firebird

1 Answer

1999 Firebird cranking problem


well first the white smoke indicateds water in fuel system. if you have a strong fuel smell that would indicated that your getting way too much fuel. there are several reasons for this. it could be that the fuel pressure regulater is malfunctiong. the throttle position sensor is bad. it could also be a timing issue.

Aug 28, 2008 | 1999 Pontiac Firebird

3 Answers

Black smoke from exhaust


hi nishga
im dave; hope i can help

First you need to determine if it is actually black smoke or if it is blue smoke. There are three colors of smoke that can come from the tailpipe. It is not white smoke obviously because that is easily differentiated from blue or black and generally indicates water or antifreeze leaking past the head gasket and into the compression area of the motor. White smoke is the steam of the water/antifreeze being emitted

Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles. The car has many seals, gaskets, and o-rings that are designed to keep the engine oil from entering the cylinder, and one of them has failed. If too much oil leaks into the cylinder and fouls the spark plugs, it will cause a misfire(engine miss) in that cylinder, and the spark plug will have to be replaced or cleaned of the oil. Using thicker weight engine oil or an oil additive designed to reduce oil leaks might help reduce the amount of oil leaking into the cylinder.

Black smoke is caused by excess fuel that has entered the cylinder area and cannot be completely burned. Another term for excess fuel is "running rich". Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a heavy fuel odour in the engine compartment. Some of the causes of excess fuel are a carburetor that is out of adjustment which is not likely unless you have installed an aftermarket carburated system on your non-carburated car, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or emissions sensor. If black smoke is present, check the engine oil to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Check the above mentioned systems and after detecting the trouble replace the faulty parts and then the engine oil and filter.

Jul 20, 2008 | 1996 Pontiac Firebird

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