I got 4 codes - bad ecu, or what?
Thread Starter
Supreme Member
Joined: Aug 2002
Posts: 3,827
Likes: 1
From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
I got 4 codes - bad ecu, or what?
Code 33, 34, 42, and 43. Replaced the map with a known good one, no difference. If I crank the car, and shut it right back off, it sets code 33, 42 - if it runs for about 15 seconds or so (maybe 10) it sets 34 and 43. The knock sensor was disconnected, but I hooked it back up. Timing set to 10º BTDC.
I can get a ecm from the junkyard for $20, no return. How on earth can one test the ECU to see if it is bad?
I can get a ecm from the junkyard for $20, no return. How on earth can one test the ECU to see if it is bad?
Thread Starter
Supreme Member
Joined: Aug 2002
Posts: 3,827
Likes: 1
From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Yep... I always clear all codes, then try again to see what comes up.
Supreme Member
Joined: Dec 2001
Posts: 1,158
Likes: 0
From: Greenville S.C.
Car: 87 Grand National
Engine: 3.8 SFI Turbo
Transmission: BRF 200R4
Have you tried TPS voltage yet?? thats part of code 43. Sounds like you've already tried the knock sensor. What about the ESC (electronic spark control).
Thread Starter
Supreme Member
Joined: Aug 2002
Posts: 3,827
Likes: 1
From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
I'll check the tps voltage... hey, is there a ESC module or something I can check? Where at?
Supreme Member
Joined: Dec 2001
Posts: 1,158
Likes: 0
From: Greenville S.C.
Car: 87 Grand National
Engine: 3.8 SFI Turbo
Transmission: BRF 200R4
Yes, the ESC is located behind the mastercylinder on the firewall. I don't have a pic but I'll get one later for you. Remember the TPS voltage has to be below 1.0 vdc when in the throttle is closed.
Thread
Thread Starter
Forum
Replies
Last Post
