MustangForums.com - 94 3.8 high idle

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BN7877

01-10-2019 09:22 AM

94 3.8 high idle

So I just got my hands on a beat up 94 V6 Mustang. I replaced quite a few parts but the car has a high idle and at the even slightest touch of the gas pedal it sends the RPM to about 1500/2000...and it stays there. When I put it in gear, it drops to about 600 and the car can drive normal. I have cleaned out the mass air sensor and replaced the IAC from AutoZone. Is there something I am missing?

Urambo Tauro

01-10-2019 10:21 AM

Vacuum leak?

BN7877

01-10-2019 10:26 AM

I hear a hissing but it sounds when it's in the high RPM

Suek	01-26-2019 10:14 PM

Throttle position sensor or the IAC (Idle air control)

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