LS2 swap - no throttle movement
LS2 swap - no throttle movement UPDATE: The pin in the C1 connector for the second 5v wasn't "in" all the way so there wasn't good connection to the pcm. Problem fixed!
Original post below:
I swapped an LS2, 4l70e, e40 ecm, and t42 tcm from a 2006 TBSS into my 64' Cutlass last fall. Got busy with life in general for the past few months and haven't had time for my project. I have some time again to get this girl going.
Issue: Since day 1, I have had no throttle response (DBW).
All wires have been checked for ground and continuity, and pass.
Everything is from 2006 TBSS.
I borrowed my buddies real nice SnapOn scanner yesterday and here's some stuff I found.
Original post below:
I swapped an LS2, 4l70e, e40 ecm, and t42 tcm from a 2006 TBSS into my 64' Cutlass last fall. Got busy with life in general for the past few months and haven't had time for my project. I have some time again to get this girl going.
Issue: Since day 1, I have had no throttle response (DBW).
All wires have been checked for ground and continuity, and pass.
Everything is from 2006 TBSS.
I borrowed my buddies real nice SnapOn scanner yesterday and here's some stuff I found.
- App/TSP sensors 1 and 2 both " agree "
- Both 5 volt references "pass"
- TAC MOTOR DISABLED
- voltage at rest .98v
- voltave at WOT 4.28V
- % at rest 0%
- % at WOT 99%
- Voltageat rest .06v
- voltage at WOT 0v
- % at rest 99%
- % at WOT 99%
- Voltage is 3.50v at both rest and WOT
- 23%
- Voltage is 1.46v at both rest and WOT
- 23%
Last edited by Fst_Byrd; Mar 10, 2020 at 07:03 PM.
Hmmm... I'm sure where I'd find that or what it is, but from scrolling through, I don't see anything like that in the tests files available.
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Joined: Dec 2011
Posts: 420
Likes: 115
What concerns me is the "app2" doesn't seem to be moving. The two sensors should be opposite of each other. So as one is at 0%, the other should be at 100%, and then they move opposite to each other. So that may be an issue with your pedal, or wiring to the pedal.
If you want to try another TB, I have a TBSS (2007, I believe) throttle body on the shelf that you could borrow. I'm local to you (Oxford / Addison twp). But I don't have a pedal laying around.
If you want to try another TB, I have a TBSS (2007, I believe) throttle body on the shelf that you could borrow. I'm local to you (Oxford / Addison twp). But I don't have a pedal laying around.
What concerns me is the "app2" doesn't seem to be moving. The two sensors should be opposite of each other. So as one is at 0%, the other should be at 100%, and then they move opposite to each other. So that may be an issue with your pedal, or wiring to the pedal.
If you want to try another TB, I have a TBSS (2007, I believe) throttle body on the shelf that you could borrow. I'm local to you (Oxford / Addison twp). But I don't have a pedal laying around.
If you want to try another TB, I have a TBSS (2007, I believe) throttle body on the shelf that you could borrow. I'm local to you (Oxford / Addison twp). But I don't have a pedal laying around.
I would love to borrow the TB as a test just to rule that out. Would there be any issue it being from an 07, and my setup being an 06? I know these systems are finicky!
Quick update to the thread. I've used a different TB (Thanks Haggar!), And bench tested the pedal, no movement still.
I'm going to try and find some time this weekend to start testing more wires and following each associated one back to see if I can find any breaks.
I'll update again after. ,🤟
I'm going to try and find some time this weekend to start testing more wires and following each associated one back to see if I can find any breaks.
I'll update again after. ,🤟
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Buckle up boys, I've got throttle movement!!
So just an update to close out this thread, I found the culprit. The pin in the C1 connector for the second 5v wasn't "in" all the way so there wasn't good connection to the pcm.
Fired her up and she screams through the entire rpm range. Now onto all the small things to get her on the road and to the track and May!
Thanks to everyone who helped out on this thread, or others, or those who loaned me parts (Haggar!).
Time for a beer 🍻
So just an update to close out this thread, I found the culprit. The pin in the C1 connector for the second 5v wasn't "in" all the way so there wasn't good connection to the pcm.
Fired her up and she screams through the entire rpm range. Now onto all the small things to get her on the road and to the track and May!
Thanks to everyone who helped out on this thread, or others, or those who loaned me parts (Haggar!).
Time for a beer 🍻
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