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TurboCamaro
July 3rd, 2018, 03:18 AM
I have a 5.3L with 4 speed auto transplanted into a 68 Chevelle that I have tuned. It runs and drives great. When you pull it into gear then let go of the brake with no throttle input the car will start moving and increasing speed even shifting. It seems TAC_PCT% is increasing but I cannot find what is driving it. When coming to a stop and stopping it takes a long time for the TAC_PCT% and RPM to reduce. Attached are engine and trans cals plus a logs.
22196
22197
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22199
TurboCamaro
July 4th, 2018, 04:15 AM
Interestingly it operates properly when cold, below 80C.
Thoughts
joecar
July 5th, 2018, 06:36 AM
I'm looking thru your files to see if I can see what's causing it...
TurboCamaro
July 5th, 2018, 01:12 PM
Thanks Joe
I’m perplexed
joecar
July 6th, 2018, 05:42 AM
What year/model/vehicle are your ECM/TCM from...?
TurboCamaro
July 9th, 2018, 01:21 PM
It's out of a 2007 Silverado 1500 the motors a 5.3
TurboCamaro
July 15th, 2018, 02:04 AM
Any thoughts on what could be causing this.
Thanks :)
joecar
July 15th, 2018, 11:41 AM
I'm still scratching my head.
TurboCamaro
July 15th, 2018, 01:27 PM
LOL
It is a perplexing one :(
statesman
July 15th, 2018, 11:12 PM
I have a 5.3L with 4 speed auto transplanted into a 68 Chevelle

Now there's your problem... a 68 Chevelle requires a 6.0L engine. Installing a 5.3L is almost criminal. :shock:
TurboCamaro
July 16th, 2018, 02:26 AM
A 6.2 or 454LSX would make even more sense :)
22263
Here's a 69 Chevelle I did
TurboCamaro
July 16th, 2018, 02:28 AM
I don't think it should matter but there was an issue with the MAF wiring. Because of the way the ECU was installed behind the dash and impossible to get to without removing the entire dash I have it running SD.
Could this have anything to do with it. I have run LS's in SD a ton of times before.