Throttle Problem - Mustang Evolution

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Old 04-16-2012, 08:30 PM   #1
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Throttle Problem

Ok I just installed my new Accufab throttle and plenum (Awesome!) and notice now when I drive around and come to idle it sticks at 1500 rpms for about 20 seconds then drops down to normal around 700 rpms. What could be doing this. I inspected everything before installing so I'm kinda clueless. Could it be the throttle sensor or just that it's going to take time for the computer to calibrate?
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Old 04-16-2012, 08:32 PM   #2
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Mine does the same thing always has I don't think it's anything to worry about
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Old 04-16-2012, 09:29 PM   #3
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Well I don't think it's suppose to do that. It didn't do that with the stock setup. Plus my gas mileage will go down with it idling like that.
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Old 04-16-2012, 09:55 PM   #4
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Mine sticks around 1,000 and takes around 10 secs then goes down to 700
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Old 04-16-2012, 10:36 PM   #5
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Mine did the same thing, after a while it went away...i think it takes a while for the ecu to adjust...also a tune might help
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Old 04-16-2012, 10:51 PM   #6
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Quote:
Originally Posted by Stangnation
Mine did the same thing, after a while it went away...i think it takes a while for the ecu to adjust...also a tune might help
I have a custom tune and mine still does it not sure why but don't seem to hurt anything
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Old 04-17-2012, 06:50 AM   #7
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Yea today driving to work it seemed to level out better it sat around 1100 rpms then drops about 5 seconds later. Huh!.....Funny?
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Old 04-17-2012, 09:04 AM   #8
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Quote:
Originally Posted by Stangnation
Mine did the same thing, after a while it went away...i think it takes a while for the ecu to adjust...also a tune might help
Yeah mine did this when I cleaned out my throttle body and iac valve, it didn't go away for a while and I thought something was wrong but it went away eventually
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Old 04-17-2012, 09:28 AM   #9
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It defiantly has more power to the pedal now! Next upgrade will be gears!!!
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Old 04-17-2012, 09:54 AM   #10
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This is funny, my car has been doing the same thing ever since I chipped her and I just got off of the phone with BAMA and they blame it on mechanical issues
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Old 04-17-2012, 10:58 AM   #11
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The real messed up thing is my idle is fine when I run it on the stock tune
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Old 04-17-2012, 06:44 PM   #12
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They told me my timing is advanced too far for the chip and I need to adjust my fuel pressure regulator so those may be two things the OP could check
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