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could be numerous things, like a faulty oxygen sensor/a.k.a O2 sensor, a faulty mass air flow sensor. it all depends on what year make and model of vehicle we are talking about
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Can a bad idle control valve cause a car to run rich?
Not normally. Usually it willl cause a high idle and lean condition. Your car needs more fuel to run rich... i.e. MAF Sensor or O2 sensor causing out of whack Fuel trims.
Can wrong spark plugs for a car cause it to run rich?
No,car will not run rich.Infact it gives misfires since escaping fuel will be the ultimate result if we use wrong spark plugs.
Could a faulty temp sensor in a 98 Saturn SC2 cause the car to idle erratically?
Yes. IT can make the engine run to rich, and then cause misfires
If a thermostat remains open will this cause your car to overheat?
A stuck open thermostat will cause a car to run cooler than needed. It will cause oil to sludge, a loss of gas mileage due to running rich and numerous other problems.
Can a cracked intake cause your car to run hot?
yes it will make bring unmetered oxygen in and the o2 sensors will pick it up and it will run lean (lean=hot) (rich=cool)
What problems can a bad I A T sensor cause?
Improper fuel mixture, can make the car harder to start and run rich. Worse gas mileage
Would a knock sensor cause the engine to run rich?
No it will not.
What would cause the 1988 ford tempo 4 cylinder to run rich and make exhaust to get very hot?
Check the coil pack, sparkplugs and sparkplug wires. if their not all firing, you might have un-burnt gas, Burning in the exhaust. causing your car to run rich.
Can a bad thermostat cause your car to run cold?
If stuck open the car will run cold. If stuck closed the car will run hot.
Can a bad oxygen sensor cause gas smell?
Yes, it cause the engine to run rich.
Would problems with the asr cause your mercedez e320 not to crank?
No. However, it can cause the car to run in "limp home" mode. No. However, it can cause the car to run in "limp home" mode.
Can a blown intake manifold gasket cause a 1994 Chevy Astro to run rich and foul the plugs?
That would probably cause it to run lean.
