speedo no longer works
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 354
Likes: 1
From: Manchester,PA
Car: 86 Firebird SE
Engine: 2.8L
speedo no longer works
I just recently swapped a 165 ECM in place of the 302 ECM in my 86 2.8 Firebird. The speedometer no longer works now, what can i do to correct this, also it idles at 2000 rpm now too. Any ideas?
Member
iTrader: (2)
Joined: Oct 2008
Posts: 113
Likes: 0
From: Osceola IN
Car: 1989 Camaro RS
Engine: LO5 350
Transmission: 700r4
Axle/Gears: 3.42 posi
Re: speedo no longer works
well since its an 86 the speedo is cable drivin or it should be so either the gear in the transmission is broke/grinded down or the cable broke or something onlong that line.
Supreme Member
iTrader: (1)
Joined: Aug 1999
Posts: 2,842
Likes: 6
From: Rowlett, TX
Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Re: speedo no longer works
It's an electronic speedo, and does not have a cable. 86 was the first year for firebirds to have it, 90 for camaro.
Joined: May 2009
Posts: 4,915
Likes: 40
From: Far West
Car: 1986 Camaro Z28 IROC-Z
Engine: 350 Tuned Port Injection, for now.
Transmission: 700R4
Axle/Gears: Posi - 3.23
Re: speedo no longer works
Well, maby you'll need to reprogram the PROM Chip
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 354
Likes: 1
From: Manchester,PA
Car: 86 Firebird SE
Engine: 2.8L
Re: speedo no longer works
I am not sure where this would be located in the prom. I loaded it up in rttuner and looked at everything, but theres nothing on the speedo signal.
Trending Topics
Joined: May 2009
Posts: 4,915
Likes: 40
From: Far West
Car: 1986 Camaro Z28 IROC-Z
Engine: 350 Tuned Port Injection, for now.
Transmission: 700R4
Axle/Gears: Posi - 3.23
Re: speedo no longer works
Im not familiar with the Computer but maby the shipset configuration and configuration is different from both boards. With that said, possibly the PROM is having trouble with the new or different board.
Joined: May 2009
Posts: 4,915
Likes: 40
From: Far West
Car: 1986 Camaro Z28 IROC-Z
Engine: 350 Tuned Port Injection, for now.
Transmission: 700R4
Axle/Gears: Posi - 3.23
Re: speedo no longer works
try switching out the Computers and see if there is a difference. If it works agian with the old one, then maby the new computer is bad or just not compatible with the PROM as in not programmed or syncronized. Just a wild guess.
Thread
Thread Starter
Forum
Replies
Last Post
beachrodder
Transmissions and Drivetrain
3
Aug 7, 2015 04:27 PM