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What causes a car to idle good and run rough when you give it gas?
Check the motor mounts.
vacuum leak?
Vacuum leek
it might be your egr valve. there is most likely a little piece of crud or carbon stopping the valve from closing all the way this causes a rough idle. 20 minute fix at a shop.
I would suspect the idle speed motor is faulty. Does the motor sometimes idle fine and then other times rough? They are about $100.00 last time I had priced one. Your dealer can price one and print out a picture of it and where it is located so you can recognize it.....1930fcoupe
i think it causes bad/rough idle
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MAF senso, or transmission fluid.
You broke it. Way to go.
check dist. cap for water
Might be a vacuum leak