PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

the only change was a converter!

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Old Mar 20, 2005 | 10:33 PM
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Default the only change was a converter!

after i installed the 4000 converter the car is now misfiring like crazy.... it is barely drivable....
i went back and down loaded a stock bin file and still the same thing....
every time i try to give it any gas it starts bogging and then sometimes when i let off of the gas it pops (backfires)

what do i do... im a noob to tuning please help me

Tyler
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Old Mar 21, 2005 | 12:08 AM
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i would think that maybe you pinched some wires when you put your transmission back on the motor. Did you check all the wiring? Cam sensor wire?
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Old Mar 21, 2005 | 07:57 AM
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Originally Posted by ty_ty13
after i installed the 4000 converter the car is now misfiring like crazy.... it is barely drivable....
i went back and down loaded a stock bin file and still the same thing....
every time i try to give it any gas it starts bogging and then sometimes when i let off of the gas it pops (backfires)

what do i do... im a noob to tuning please help me

Tyler

There is a sticky at the top of this page that explains the correlation between big converters and misfires. It will walk you through eliminating it.

https://ls1tech.com/forums/pcm-diagnostics-tuning/162767-i-just-replaced-my-torque-converter-now-unlocks-randomly-fix.html
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Old Mar 21, 2005 | 08:19 AM
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I belive i did all the sticky "fixes" last night and it did help a little but when i am above say 4700 rpms it doesnt throw codes but it sputters still and really has no power... what else can i do to fix this.... or does it take time to learn it self out?

Thanks

Tyler

Last edited by ty_ty13; Mar 21, 2005 at 09:32 AM.
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Old Mar 21, 2005 | 08:44 AM
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Do you have a log of what is going on? I would be interested to see it.
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Old Mar 21, 2005 | 09:07 AM
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u want me to record it on HPtuners in the scanning mode?

sorry for silly questions im new at tunning.

i can email you my tune also...

what is your email..

Thanks,

Tyler

Last edited by ty_ty13; Mar 21, 2005 at 09:32 AM.
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Old Mar 21, 2005 | 09:38 AM
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here is what i did to try and fix it... i set the activation temp to 141 and deactivation temp to 142. put the 32767 in the three tables ( i dont remember what they were called right off the top of my head) but they already had the number "32767" in some of the cells so i put it in all of them... i deleted torque managment by way of the "tunning 101" sticky. and i also changed the shift speed by way of "tunning 101" also.

I feel like im still missing something... because it runs pretty good until i hit higher rpms then it starts stumbling and bogging down...



Tyler
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Old Mar 21, 2005 | 11:38 AM
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Folks keep in mind he is having actual misfire problems, as in its barley running. Those suggested corrections eliminate the false misfire problems caused by converter weight and how it effects the ses light and converter lockup.

I'd check the crank and cam sensors, make sure no wires were pinched, nothing was left unpluged ect. Might not hurt to change the fuel filter
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Old Mar 21, 2005 | 12:50 PM
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I have got it to were normal (easy on the gas) driving conditions aren't bad.. but once you WOT it starts to kinda sputter after about 47xx rpms...

any one know what it might be?


Tyler
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Old Mar 21, 2005 | 01:45 PM
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Originally Posted by ty_ty13
I have got it to were normal (easy on the gas) driving conditions aren't bad.. but once you WOT it starts to kinda sputter after about 47xx rpms...

any one know what it might be?


Tyler

TTT

help and A4 guy out
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Old Mar 21, 2005 | 04:03 PM
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I'd still change that fuel filter. recheck all electrical connections.
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Old Mar 21, 2005 | 09:26 PM
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I just remembered.... when i first got the car back I found an exhaust leak right after the collector on the header.... i drove it like this for about 45-60 min...

could it be that after the battery had been unplugged for so long that it was trying to relearn itself but it had an exhaust leak and it learned the wrong thing (if that makes sense at all)

or could it be that i fouled some plugs?

im really running out of answers so I guess i will keep looking!

please tell me if the guesses above are sane or not.

Thanks!


Tyler
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