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There are a number of things that can cause an engine to run rough. Plugs may be bad. Plug wires may be bad. If you have sensors, there may be a bad sensor. You could have water in your gas. Could have a burnt valve. There is a number of different things.
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∙ 16y ago
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Will a bad fuel cap cause your car to run rough or die?
A bad fuel cap can make your check engine light go on. It shouldn't cause your car to run rough or die.
How do you know if your car has bad fuel?
bad fuel will cause engine run rough stall out a lot vechicle wont start
Why does engine run rough when ac is on?
Your air conditioning unit is going out, Which is connected to the serpentine belt which is connected to the pulleys on your engine which could cause your car to run rough. Also you need to either have your air coditioning unit removed or replaced because it could do serious damage to your engine.
What could cause your car to idol high and run rough?
A vacuum leak can cause that.
What is wrong if the car starts to shimmey and feels like its going to stall?
A bad spark plug or spark plug wire will cause your car to run rough. A dirty air filter will also cause your car to run rough.
How do you know if your car's ECU is broken?
the car will run rough, and the check engine light will be on. and depending on the car, it could possibly not run at all
Could a broken cam shaft cause a car to run rough?
Not likely. A broken Camshaft would cause a car to not run at all, unless maybe it had 2 camshafts, then it might barely run and run loudly then quit. The most common reason for an engine to run roughly is neglect; too little maintenance or tune-ups, broken hoses, wires or sensors, dirty air filter or dirty fuel. .. lets not forget .. an engine jumping time.. if it will still run it would run rather rough
Would a faulty egr valve cause your car to jerk?
A faulty or clogged egr valve can cause an engine to run rough. If stuck or clogged the valve can be cleaned after removal with carburetor cleaner.
What would cause your engine to run rough and sound like rocks in it?
incomplete combustion of fuel
Will a vacuum leak always make your engine run rough?
No, on a fuel injected engine it can cause high idle speed.
Would one year old gas cause engine to run rough?
It absolutly can. if the tank was not filled up prior to to sitting condensation will form causing water to mix with fuel. even a small amount of moisture can cause the engine to run rough.
Does bad gas make your car run rough or shake?
It sure can. In some cases your car will not run at all. Normally bad gas just means it is contaminated with moisture. A tiny amount of moisture and your engine will miss and run rough.
