PLEase heLP....bad idle!! - Muscular Mustangs
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post #1 of 7 Old 05-13-2008, 10:28 PM Thread Starter
 
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PLEase heLP....bad idle!!

hey! ok here's my question...please help.im so fed-up
when i first strart my 88 coupe(5.0) it idles fine a 800 rpm's but when i press on the gas or go for a drive and come to a stop it idle's high at 1200 rpm's and if i shut the car of and start it again its at 800 rpm's ... but as soon as i press on the gas its back up at 1200 rpm....i did the base idle reset and the tps is at 99...im trip'n,need help here.any help would be apreciated,tks!!!
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post #2 of 7 Old 05-14-2008, 03:24 AM
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Its funny I just posted this exact same thing in another thread.

Did you try cleaning the idle motor and throttle body?



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post #3 of 7 Old 05-15-2008, 01:47 AM Thread Starter
 
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i cleaned the TB today and the IAC... and still the same thing,i even tried 2 different IAC from my friends mustang's same year as mine and nothing changed,its weird!!!hmmmm
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post #4 of 7 Old 05-15-2008, 04:36 AM Thread Starter
 
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i also wanted to mention that when its idleling high....like when i press the gas or come to a stop,i hit the gaz pedal once the idle goes down to normal (800)its weird....its almost like when you kick off a choke
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post #5 of 7 Old 05-16-2008, 02:06 AM Thread Starter
 
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well today,i changed the tps and did the base idle thing and reset'd the computer and still runs the same way...at start up its 750 smooth idle but as soon as i press the gas it stays at 1200,i even check good for vaccum leaks but nothing!!!
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post #6 of 7 Old 05-16-2008, 11:45 PM Thread Starter
 
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well problem fixed it ending up being a little crack in the hose on the firewall inback of the intake....niiiiiice!!!
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post #7 of 7 Old 05-17-2008, 01:34 AM
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Glad you figured it out!



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