Question about HPTuners log
Thread Starter
Launching!
Joined: Apr 2015
Posts: 237
Likes: 1
From: Henderson NV
Question about HPTuners log Trying to tune transmission shiftpoints and most importantly downshift "eagerness" of the tranny. As soon as I touch the pedal a bit, it wants to downshift and scream. Trying to make it do that a bit less. Had good luck increasing the MPH numbers by about 10.
Anyway, during a long scan I noticed my TCC slip percentage up to about 208%. The PCM ocasionally sets the usual P code relating to "transmission component slipping". Is this the sign of a bad converter ?
Anyway, during a long scan I noticed my TCC slip percentage up to about 208%. The PCM ocasionally sets the usual P code relating to "transmission component slipping". Is this the sign of a bad converter ?
https://ls1tech.com/forums/pcm-diagn...y-awesome.html
Use this to set your shift points. You may need to play around, but this will get you into the ballpark.
Use this to set your shift points. You may need to play around, but this will get you into the ballpark.
Thread Starter
Launching!
Joined: Apr 2015
Posts: 237
Likes: 1
From: Henderson NV
Thread Starter
Launching!
Joined: Apr 2015
Posts: 237
Likes: 1
From: Henderson NV
https://ls1tech.com/forums/pcm-diagn...y-awesome.html
Use this to set your shift points. You may need to play around, but this will get you into the ballpark.
Use this to set your shift points. You may need to play around, but this will get you into the ballpark.
Sounds high. Should be 0% if locked up.
Do you have your TCC Duty Cycle set to 100 for Maximum and 90 for Minumum? You don't want the converter "slipping" into lock-up. That'll ruin it. It won't help your slip numbers, but might stop any further damage.
Also, are you sure it's locked? Are you running a MAF tune? Any misfires detected and it'll unlock the converter. So you have to set the misfire table to the max (32700 or whatever) to desensitize. If in SD, that's done automatically.
Do you have your TCC Duty Cycle set to 100 for Maximum and 90 for Minumum? You don't want the converter "slipping" into lock-up. That'll ruin it. It won't help your slip numbers, but might stop any further damage.
Also, are you sure it's locked? Are you running a MAF tune? Any misfires detected and it'll unlock the converter. So you have to set the misfire table to the max (32700 or whatever) to desensitize. If in SD, that's done automatically.
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Thread Starter
Launching!
Joined: Apr 2015
Posts: 237
Likes: 1
From: Henderson NV
Sounds high. Should be 0% if locked up.
Do you have your TCC Duty Cycle set to 100 for Maximum and 90 for Minumum? You don't want the converter "slipping" into lock-up. That'll ruin it. It won't help your slip numbers, but might stop any further damage.
Also, are you sure it's locked? Are you running a MAF tune? Any misfires detected and it'll unlock the converter. So you have to set the misfire table to the max (32700 or whatever) to desensitize. If in SD, that's done automatically.
Do you have your TCC Duty Cycle set to 100 for Maximum and 90 for Minumum? You don't want the converter "slipping" into lock-up. That'll ruin it. It won't help your slip numbers, but might stop any further damage.
Also, are you sure it's locked? Are you running a MAF tune? Any misfires detected and it'll unlock the converter. So you have to set the misfire table to the max (32700 or whatever) to desensitize. If in SD, that's done automatically.
This is a completely stock 1999 PCM/tune. I assume MAF ?
I didn't mess with the duty cycle, but maybe I can increase it to help a dying converter until I can have the tranny rebuilt/looked at ?
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Launching!
Joined: Apr 2015
Posts: 237
Likes: 1
From: Henderson NV
Yes. It's made so it won't lock up so hard. For an aftermarket stall, you want that. If you have a transgo unit, it won't matter. The PWM hits at whatever the transgo unit allows. Otherwise, it's PCM controlled. That should help with a slipping stall though.