Revs staying up. - Mustang Evolution

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Old 10-25-2011, 10:04 AM   #1
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Revs staying up.

If I rev up my car the rpms only come down to about 1500 to 2000 rpms. Stays there for Bot 7 to 10 seconds and then drops down to idle. Does anyone know why this is?
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Old 10-25-2011, 10:55 AM   #2
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Re: Revs staying up.

Clean throttle body maybe...
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Old 10-25-2011, 11:19 AM   #3
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Check your throttle cable spring, might be sticking a little bit, also could be a tps issue but normally that also causes rough idle with the rpms surging up and down at idle. Could also try cleaning your idle air control valve to see if that helps any.
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Old 10-25-2011, 11:44 AM   #4
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Sting is good. It opens and closes fine. Dident take off throttle body but lookenin it and it does not dirty or gunked up

---------- Post added at 10:44 AM ---------- Previous post was at 10:43 AM ----------

And when I first start it the rpms go way up and down for a bit
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Old 10-25-2011, 01:09 PM   #5
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Could be a faulty tps sensor, what year in the car?
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Old 10-25-2011, 02:17 PM   #6
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Your computer is confused. Mine did that, mine was the idol after checking everything. Maybe clean your iac toooo.
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Old 10-25-2011, 02:47 PM   #7
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Iac sounds like to me
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Old 10-25-2011, 09:41 PM   #8
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Going to check iac tomorrow and maybe see about getting a new tps Car is a 93
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Old 10-25-2011, 09:41 PM   #9
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Re: Revs staying up.

Usually it is a bad TPS or your 10-Pin connector is not making good connection.

See this post for a link to more information.

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Old 10-26-2011, 04:37 PM   #10
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And the winner is....... Bad tps. Put a new one one for $35 and it fixed the prob
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Old 10-26-2011, 05:41 PM   #11
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Re: Revs staying up.

Quote:
Originally Posted by Chefnick View Post
And the winner is....... Bad tps. Put a new one one for $35 and it fixed the prob
Glad you got it fixed.
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Old 10-26-2011, 08:06 PM   #12
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Idle control sensor sounds like its bad, try carb or throttle cleaner, take it off the throttle body and spray it inside, if not get a motor craft one from the dealer or 50 resto online it's about $100-120. If you get and idle surge constantly it's your mass air flow sensor.

---------- Post added at 08:06 PM ---------- Previous post was at 08:01 PM ----------

Disregard what I said! Tps that's new to me, didn't know that would keep you revs up, I guess having the wrong voltage will cause that.
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