Turbo LSX Mustang high idle when moving...need help!
05-01-2016, 05:30 PM
#1
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Turbo LSX Mustang high idle when moving...need help! This high idle is kicking my ***!
My car is a turbo sbe 5.3. ls6 intake/tb. th400 trans, stock 0411 pcm and custom harness.
Heres whats going on. Once its fully warmed up; roughly 20-30 mins of driving it will start to idle high when its moving. Around 1500-1800 rpms or so regardless of what gear its in, and once i come to a complete stop it takes about 2 seconds and it will drop to a normal idle around 800ish.
I'm using an f body cluster and an electronic th400 speed sensor. And i installed a new IAC motor as the old one was indeed sticking.
Heres the deal though, this problem didn't start until i had the car tuned. it runs great, makes great power but he cant seem to figure out this idle issue. I reverted back to the base tune that was in the car just to get it on the road, and it still acts up. aside from the idle tables (throttle cracker/follower and airflow) is there another table i should be looking at? I am in contact with my tuner, who im confident will eventually get it, but we are a couple hours apart and its hard to diagnose it over the phone.
I have hptuners and can make some small adjustments but im not terribly comfortable just winging it.
anyone willing to take a look at the .hpt file and see what they think?
Edit: I should note, I'm confident there's no vacuum leak, I've double checked every possible source.
thanks fellas
My car is a turbo sbe 5.3. ls6 intake/tb. th400 trans, stock 0411 pcm and custom harness.
Heres whats going on. Once its fully warmed up; roughly 20-30 mins of driving it will start to idle high when its moving. Around 1500-1800 rpms or so regardless of what gear its in, and once i come to a complete stop it takes about 2 seconds and it will drop to a normal idle around 800ish.
I'm using an f body cluster and an electronic th400 speed sensor. And i installed a new IAC motor as the old one was indeed sticking.
Heres the deal though, this problem didn't start until i had the car tuned. it runs great, makes great power but he cant seem to figure out this idle issue. I reverted back to the base tune that was in the car just to get it on the road, and it still acts up. aside from the idle tables (throttle cracker/follower and airflow) is there another table i should be looking at? I am in contact with my tuner, who im confident will eventually get it, but we are a couple hours apart and its hard to diagnose it over the phone.
I have hptuners and can make some small adjustments but im not terribly comfortable just winging it.
anyone willing to take a look at the .hpt file and see what they think?
Edit: I should note, I'm confident there's no vacuum leak, I've double checked every possible source.
thanks fellas
Last edited by phat_ridegt; 05-01-2016 at 05:57 PM.
05-01-2016, 06:04 PM
#2
This high idle is kicking my ***!
My car is a turbo sbe 5.3. ls6 intake/tb. th400 trans, stock 0411 pcm and custom harness.
Heres whats going on. Once its fully warmed up; roughly 20-30 mins of driving it will start to idle high when its moving. Around 1500-1800 rpms or so regardless of what gear its in, and once i come to a complete stop it takes about 2 seconds and it will drop to a normal idle around 800ish.
I'm using an f body cluster and an electronic th400 speed sensor. And i installed a new IAC motor as the old one was indeed sticking.
Heres the deal though, this problem didn't start until i had the car tuned. it runs great, makes great power but he cant seem to figure out this idle issue. I reverted back to the base tune that was in the car just to get it on the road, and it still acts up. aside from the idle tables (throttle cracker/follower and airflow) is there another table i should be looking at? I am in contact with my tuner, who im confident will eventually get it, but we are a couple hours apart and its hard to diagnose it over the phone.
I have hptuners and can make some small adjustments but im not terribly comfortable just winging it.
anyone willing to take a look at the .hpt file and see what they think?
Edit: I should note, I'm confident there's no vacuum leak, I've double checked every possible source.
thanks fellas
My car is a turbo sbe 5.3. ls6 intake/tb. th400 trans, stock 0411 pcm and custom harness.
Heres whats going on. Once its fully warmed up; roughly 20-30 mins of driving it will start to idle high when its moving. Around 1500-1800 rpms or so regardless of what gear its in, and once i come to a complete stop it takes about 2 seconds and it will drop to a normal idle around 800ish.
I'm using an f body cluster and an electronic th400 speed sensor. And i installed a new IAC motor as the old one was indeed sticking.
Heres the deal though, this problem didn't start until i had the car tuned. it runs great, makes great power but he cant seem to figure out this idle issue. I reverted back to the base tune that was in the car just to get it on the road, and it still acts up. aside from the idle tables (throttle cracker/follower and airflow) is there another table i should be looking at? I am in contact with my tuner, who im confident will eventually get it, but we are a couple hours apart and its hard to diagnose it over the phone.
I have hptuners and can make some small adjustments but im not terribly comfortable just winging it.
anyone willing to take a look at the .hpt file and see what they think?
Edit: I should note, I'm confident there's no vacuum leak, I've double checked every possible source.
thanks fellas
05-02-2016, 03:03 PM
#4
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so i tried to change that, and it didnt help, in fact it made it a little worse. now the idle hangs up whenever i drive it, not just fully warmed up. i flashed back to the original settings and it didnt change. im stumped??? i cant seem to get the tps% to show up when im scanning, but the voltage seems okay. .50 volts at 0% throttle and 4.12ish at wot.
05-02-2016, 05:05 PM
#6
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uploaded....didnt realize i could upload it right to the forum thanks.
the guy who tuned it is very reputable and i talked to him a little bit ago. he is working on sending me an updated file. i originally had a sticking iac motor when he first tuned the car, i have since replaced it but its tough because we are far apart to make adjustments.
the guy who tuned it is very reputable and i talked to him a little bit ago. he is working on sending me an updated file. i originally had a sticking iac motor when he first tuned the car, i have since replaced it but its tough because we are far apart to make adjustments.
05-09-2016, 10:59 AM
#7
uploaded....didnt realize i could upload it right to the forum thanks.
the guy who tuned it is very reputable and i talked to him a little bit ago. he is working on sending me an updated file. i originally had a sticking iac motor when he first tuned the car, i have since replaced it but its tough because we are far apart to make adjustments.
the guy who tuned it is very reputable and i talked to him a little bit ago. he is working on sending me an updated file. i originally had a sticking iac motor when he first tuned the car, i have since replaced it but its tough because we are far apart to make adjustments.
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05-09-2016, 11:24 AM
#8
Staging Lane
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thanks.
fingers crossed but i believe the problem was a corrupt file. i decided to load the base file i had before it was tuned, and i had to do a 'write entire'. did that, of course it doesnt run as well but zero idle issues, then i flashed back to the file i posed, using a full write again, and the problem is completly gone. lots of driving, wot runs, and city driving and so far so good.
fingers crossed but i believe the problem was a corrupt file. i decided to load the base file i had before it was tuned, and i had to do a 'write entire'. did that, of course it doesnt run as well but zero idle issues, then i flashed back to the file i posed, using a full write again, and the problem is completly gone. lots of driving, wot runs, and city driving and so far so good.