Why does my trans not downshift at WOT?
Why does my trans not downshift at WOT? I've got the strangest thing happening...
Sometimes, when I put the pedal down, the car takes off like a raped ape...
And other times, even though EFI live shows 100% throttle position, it accelerates as fast as if I was clicking the accel button on cruise control!?!?
I'm taking the car to be dyno'd in a week and a half, and I need some ideas on how to fix this.
I've got lots of logs.
Here's a snapshot of what it looks like when the car's running good...
http://mail.chartermi.net/Session/8...e/Snapshot1.doc
and here's one of it running like crap at launch...
http://mail.chartermi.net/Session/8...e/Snapshot2.doc
I thought the TC was locked up or something, but running bad, I can still feel it lock up at 50 or so. Best guess is it's not downshifting. Please help me...
Sometimes, when I put the pedal down, the car takes off like a raped ape...
And other times, even though EFI live shows 100% throttle position, it accelerates as fast as if I was clicking the accel button on cruise control!?!?
I'm taking the car to be dyno'd in a week and a half, and I need some ideas on how to fix this.
I've got lots of logs.
Here's a snapshot of what it looks like when the car's running good...
http://mail.chartermi.net/Session/8...e/Snapshot1.doc
and here's one of it running like crap at launch...
http://mail.chartermi.net/Session/8...e/Snapshot2.doc
I thought the TC was locked up or something, but running bad, I can still feel it lock up at 50 or so. Best guess is it's not downshifting. Please help me...
Originally Posted by 1BadpurpleLT1
Could be low on fluid? Could be a valve body going bad to. Those are my 02.cents
I checked and topped off the fluid, so it's not that.
The change was almost instant. Last runs last year it ran fine.
Now it's not. I'm gonna check on what all went into that mail order tune, but comparing the original flash file and the new one, not much has changed.
Just got off the phone with Jason at Texas Speed, and we changed the P0121 settings so it wouldn't throw that code. He thinks it'll make a huge difference here.
I'll keep y'all informed as to whether it worked or not
I'll keep y'all informed as to whether it worked or not
Yep, that did the trick. One simple code, and the thing runs awesome now.
All we had to do was change the P0121 MAP settings to 75 and 85 (from 55 to 65) in the engine diagnostics tab.
Thanks for saving the day Jason
And thanks to all that replied
All we had to do was change the P0121 MAP settings to 75 and 85 (from 55 to 65) in the engine diagnostics tab.
Thanks for saving the day Jason
And thanks to all that replied
