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Old Jul 31, 2011, 11:15 PM   #1
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throttle hang issue. need help

okay so my car seems to be having a throttle hang issue. when i shift the car will stay at the RPM i push the clutch in at for like 2 seconds.

but heres the kicker. sometimes the car will stay at the RPM i push the clutch in and not come down, and its kinda like the car is on cruise control. it will just stay at that RPM. to get the RPM's back to normal, i have to kinda give it full throttle for a second, then the throttle will not hang and idle will be normal.

why is this happening? is this something in the ECU? the car is stock ECU speed density tuned. i have tried cleaning the IAC, throttle body and checked to make sure IAC is working. i have also set the idle using the evoscan IAC mode and reset the ecu. checked for boost leaks and all. everything checks out...i have no idea what to do to fix this.

if someone would like id send them a copy of map and they could look to make sure everything looks okay.
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Old Aug 1, 2011, 06:08 AM   #2
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Look at your logs and see if the TPS is working properly. I have this problem as well, still waiting for my TPS to arrive in the mail.
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Old Aug 1, 2011, 07:42 AM   #3
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Have you routed your throttle wire?
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Old Aug 1, 2011, 07:57 AM   #4
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Have you routed your throttle wire?
throttle wire is where it always was from the factory
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Old Aug 1, 2011, 08:08 AM   #5
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It loops around and into the throttle wire clip on the valve cover right?

I was going to say if you have re routed the cable then it's been known to cause more friction in the line. But even in the stock location its possible for the wire to gain friction in the cable over time. Whats the odometer at? You can inspect and lube the wire with something like white lithium. I've seen this problem at least 3 times.
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Old Aug 1, 2011, 08:28 AM   #6
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the car has 58,000 miles on it, its still a baby. haha
i checked the throttle cable and it doesnt seem to hangup anywhere.

as far as the TPS log, if im at idle or let off the throttle, what should the TPS be reading?
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Old Aug 1, 2011, 08:42 AM   #7
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the car has 58,000 miles on it, its still a baby. haha
i checked the throttle cable and it doesnt seem to hangup anywhere.

as far as the TPS log, if im at idle or let off the throttle, what should the TPS be reading?
Idle should be at 13.333333%, it should move once you blip the throttle. Mine would stay at 13.333333% till I go about 1/3 way onto the pedal. Still waiting for the replacement in the mail.
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Old Aug 1, 2011, 08:51 AM   #8
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okay well looking at 2 idle logs i did yesterday, the tps is reading 14.90% and will keep jumping up back and forth to 15.2%... this is at idle, with me not even touching the throttle
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Old Aug 1, 2011, 08:57 AM   #9
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That's fine, mine stays at 13.333333% because it's faulty.

How did you clean your IAC? I've seen someone on here who took out their IAC and the teeth are all gone, ended up replacing it and the car ran beautifully afterwards.
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Old Aug 1, 2011, 09:00 AM   #10
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i cleaned the iac with cleaners you can only get if you work for a dealership. its made to clean carbon out of the TB and engine. its what they would use if you paid $300+ for the service. i dont know the name of it. but it works

the iac is clean and im assuming it works because when i click the idle adjustment mode in evoscan, my idle changed drastically at first. then i fixed it
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Old Aug 1, 2011, 09:03 AM   #11
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im really thinking this is something in my ECU causing this. like the idle stepper tables are off or something. but im not sure if that would explain the car being stuck at the rpm
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Old Aug 1, 2011, 09:07 AM   #12
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Mine did the same thing a little before my clutch took a dump on me, not sure if it was a related to it.
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Old Aug 1, 2011, 09:12 AM   #13
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Mine did the same thing a little before my clutch took a dump on me, not sure if it was a related to it.
no this definately isnt a clutch issue. i know that for sure. this is something in my ecu. i just have that gut feeling. like i said i went over this car inside and out trying to find this problem
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Old Aug 1, 2011, 09:13 AM   #14
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Did you get tuned recently? If so you'll need to ask your tuner about this
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Old Aug 1, 2011, 09:24 AM   #15
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i got tuned a few months ago
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Old Aug 1, 2011, 09:24 AM
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