need help with obd1
Thread Starter
Registered User
Joined: Feb 2012
Posts: 1
need help with obd1
I have a 1994 Z/28 my check engine light is and and I have tried the key and bought a code reader for it and the light still wont flash, all it does is turn the fans on any help will be greatly appreciated.....thanks.....
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Re: need help with obd1
Welcome to CamaroZ28.com!!!
As Ted noted, best place for tech questions is the 'tech' forums.
For a quick answer, you can't use a "code reader" that shorts the ALDL connector pins, and flashes the codes on the SES light with a 94 or newer LT1. Last year that would work was 93, and you didn't need a $30 code reader, you just needed a paperclip to short the pins.
For a 94 LT1 you need to use a real OBD-I scanner, with a 12-pin ALDL connector and it's own dsiplay screen. Auto Xray used to make some great OBD-I scanners, and you can find them used on ebay. Alternatively, you can put free software on a laptop, get a cable and scan the PCM, reading the codes, and seeing the values for the critical sensors and PCM parameters.
TTS Power Systems
FreeScan
I don't think Andrew sells the cables any more, but I believe his website has a link to a source:
AKM Electronics Home Page
For a quick answer, you can't use a "code reader" that shorts the ALDL connector pins, and flashes the codes on the SES light with a 94 or newer LT1. Last year that would work was 93, and you didn't need a $30 code reader, you just needed a paperclip to short the pins.
For a 94 LT1 you need to use a real OBD-I scanner, with a 12-pin ALDL connector and it's own dsiplay screen. Auto Xray used to make some great OBD-I scanners, and you can find them used on ebay. Alternatively, you can put free software on a laptop, get a cable and scan the PCM, reading the codes, and seeing the values for the critical sensors and PCM parameters.
TTS Power Systems
FreeScan
I don't think Andrew sells the cables any more, but I believe his website has a link to a source:
AKM Electronics Home Page
Thread
Thread Starter
Forum
Replies
Last Post
whitehooptie
Computer Diagnostics and Tuning
3
Aug 10, 2015 07:02 AM
88IROC_Z
Computer Diagnostics and Tuning
2
Jul 22, 2015 11:38 PM
sfGi8nt
LT1 Based Engine Tech
3
Mar 15, 2004 03:27 PM