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seancolon · 11-06-2007, 07:19 AM

Erratic Idle

This is a common problem with the 94-95 5.0 Mustangs, and is almost always related to the IAC, TPS, and even a dirty throttle body. The IAC controls the amount of air entering the engine to control the idle speed. When the IAC fails to do its job properly (dirty, broken, etc.), the idle quality suffers. You may have a surging idle, rough idle, or the car may not idle at all.

If you experience this problem, you may want to try cleaning the IAC. This is done by taking it off the throttle body, and spraying carburetor cleaner into each oriface on it. Replace the IAC onto the throttle body, and crank the car. You may or may not experience a change. Also, you should check your TPS voltage if you have an erratic idle and reset it to .97-.99volts if it is out of range. Lastly, the throttle body can be cleaned by holding it open, and spraying carburetor cleaner to get rid of any deposits..

11-06-2007, 07:19 AM	#2 (permalink)
seancolon Member Join Date: Apr 2006 Posts: 49	Surging Erratic Idle This is a common problem with the 94-95 5.0 Mustangs, and is almost always related to the IAC, TPS, and even a dirty throttle body. The IAC controls the amount of air entering the engine to control the idle speed. When the IAC fails to do its job properly (dirty, broken, etc.), the idle quality suffers. You may have a surging idle, rough idle, or the car may not idle at all. If you experience this problem, you may want to try cleaning the IAC. This is done by taking it off the throttle body, and spraying carburetor cleaner into each oriface on it. Replace the IAC onto the throttle body, and crank the car. You may or may not experience a change. Also, you should check your TPS voltage if you have an erratic idle and reset it to .97-.99volts if it is out of range. Lastly, the throttle body can be cleaned by holding it open, and spraying carburetor cleaner to get rid of any deposits..