Question:
The car will run fine for a little while and then will shake and slow down like it's not getting enough of something and then it will blow out a cloud of black smoke and will run fine. Then one day it just turned off when I was going down the road it doesn't get hot or anything it just turned off. A few hours later it just started right back up. It was running rough. A mechanic checked the exhaust and said that wasn't the problem. What else could it be? It does have over 100,000 miles. It seems to run better and not shake when I put fuel injection cleaner in it for a little while but then it will start to shake again. Please help me.
Answers:
How do I find out if my car has SEALED BEAM HEADLIGHTS or not?
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. 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.How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example 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. Call your mechanic and advise him of what you have found.
Have the timing checked by a REPUTABLE mechanic.
My 1998 Chrysler Concorde just failed emissions.?
Have somebody check the fuel pressure regulator pronto.What is the price range it should cost to replace a head casket?
Oxygen sensors, MAF sensor..From your description I would at first focus on the injectors. You may have on sticking or going bad. Pull the plugs and see if one is fouling. Are you burning more than a quart of oil between oil changes? If so could be a mechanical problem causing a plug or plugs to foul.
More Questions & Answers ...
This article contents is post by this website user, CarQnA.com doesn't promise its accuracy.