TPS voltage
Thread Starter
Junior Member
Joined: Apr 2001
Posts: 8
Likes: 0
TPS voltage
My 89 Formula has a difference in voltage at the TPS and in what the computer sees. When a VOM is connected directly to the TPS I will see 4.5v at WOT but when reading it with my AutoXray thru the ALDL I only see 3.7v. Any ideas?
Senior Member
Joined: Nov 2000
Posts: 727
Likes: 1
From: Charleston, WV, USA
Car: '86 IROC-Z + Misc. project cars.
Engine: Supercharged + Nitrous TPI 355 CID
Transmission: Art Carr built Th700r4
You may have a voltage drop through the wires and connectors between the sensor and the ECM.
Find the corect wire where it enters the ECM (at the ECM wire harness plug) and check the voltage there.
It also may be an improperly calibrated meter you are using. Try another meter and compare.
Also might be a varrience with the ECM, PROM or maybe even the scanner.
------------------
Tracy /AKA IROCKZ4me
'86 IROC-Z Camaro
"Cogito ergo zoom"
- 355 cid
- AFR heads
- Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
- modified SLP runners
- TRW forged pistons/ceramic coated
- fully balanced
- Edelbrock headers/ceramic coated
- SLP cat-back
- Paxton supercharger
- Nitrous Express nitrous oxide
Thread
Thread Starter
Forum
Replies
Last Post
BumpaD82
Tech / General Engine
37
Feb 26, 2016 02:57 PM
HoosierinWA
Tech / General Engine
5
Oct 7, 2015 10:15 AM
MikkoV
TPI
2
Sep 9, 2015 04:25 PM