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post #1 of 6 (permalink) Old 10-28-2012, 11:55 AM Thread Starter
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Correct Idle Speed

What's the correct Idle speed of a 3.8 stock engine? Somehow I think mine is way off.

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post #2 of 6 (permalink) Old 10-28-2012, 11:57 AM
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In drive, 600. At operating temperature in park or neutral, 800.

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post #3 of 6 (permalink) Old 12-16-2012, 01:20 PM
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Mine will shake really bad if it gets that low, so mine is set at 1k

1993 Thunderbird LX. 3.8L with Underdrive Pulleys, Ford Racing Limited-Slip Differential, Intake & Dual Exhaust, and I like to run advanced timing
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post #4 of 6 (permalink) Old 12-16-2012, 01:25 PM
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Mine will shake really bad if it gets that low, so mine is set at 1k
Wouldn't it be better to fix the vibration problem rather than running the idle up?

Just saying.

RwP
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post #5 of 6 (permalink) Old 12-16-2012, 01:32 PM
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Yes, believe me, if I knew what the problem was that causes the rough idle, I would have fixed it haha. Its very confusing, everything that would come to mind when you think running rough has been replaced/fixed, to no avail :/

1993 Thunderbird LX. 3.8L with Underdrive Pulleys, Ford Racing Limited-Slip Differential, Intake & Dual Exhaust, and I like to run advanced timing
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post #6 of 6 (permalink) Old 12-16-2012, 03:17 PM
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Compression? Cylinder balance? Leakdown test? Cam checked for a worn lobe? New lifters / pushrods / rockers? Heads checked and redone?

Until you've torn the motor down and blueprinted it back together, not everything has been done

RwP
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