Question about 1992 Oldsmobile Achieva

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Excelerated slow on the eway, got home and now it cranks but wont start, car backfires when trying to start and black smoke comes from tailpipe, also smells of gas

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You might have a louse timing belt, and your car might be out of timing.

Posted on Sep 09, 2010

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I have a 1999mercury mystiuqe there is white smoke coming out the tailpipe n knocking when u hit the excelerator


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Black smoke from tailpipe, loss of power, anyone know?


What year, make and model car is this? Most likely, black smoke is
usually a carburator problem. If it's fuel injected, black smoke can be caused by 1) leaking or faulty fuel injecters, 2) faulty choke, 3)dirty air
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78 f250 died while driving slow and wont start. getting fuel, coil fireing didnt check rotor or plugs, spin it over try to give it trottle backfires out tailpipe


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Sep 18, 2011 | 1982 Ford F 250

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While driving down highway engine just stalled & would not restart. I checked timing chain & it was fine. Engine cranks but sounds unusual. I smell fuel at tailpipe while cranking.I checked for...


Try starting the motor in the "Clear Flood Mode" which is starting it while you press and hold the pedal to the floor, this will cause the injectors to close. Sometimes if the temp sensor goes bad it will command the ecm to pump more fuel resulting in a rich mixture. Was the smoke black? If so there's a fuel mix issue.

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Car hard to start. Car will emit


You could need a tune up. Remove a few of the spark plugs and look to see if they are black with carbon (black hard and flaky residue) or black with oil. When you check it, make sure its sat for at least half the day, but a full day would be best. If its covered in oil then you have bad valve guides and could require major engine work, or just some valve seals to stop the leak. The bucking and backfires could be caused by a faulty TPS or ignition module. Its a start.

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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

1 Answer

1988 Olds Ninety Eight Regency Brougham


What color smoke out of the tailpipe ? Black - running rich , too much fuel or not enough air . Blue smoke - burning oil , piston rings valve seales , white smoke could be two different thing's - coolant in the cylinders or fuel going stright through the cylinder out the tailpipe . No combustion .
Check engine light on ? Have you replaced plugs an plug wires ,air filter , any engine sensors - TPS - MAP - MAF etc.... How many miles on the vehicle ? 1988 model - engine worn out ?

Aug 10, 2017 | 1989 Oldsmobile Ninety Eight

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