Limp Mode
Thread Starter
Junior Member
Joined: Mar 2008
Posts: 8
Likes: 0
From: Saint George, Utah
Car: 1989 Firebird Formula 350
Engine: LQ9/LS3 Heads
Transmission: 4L60E
Axle/Gears: 3.27 9 bolt
Limp Mode
What are the problems that cause the ecm to go into limp mode?
I have an '89 Formula 350 that is running rich all the time. I am pulling my hair out trying to find problem.
I replaced the plug wires, coil, distributer. It has a new TPS, O2 sensor with tb coolant bypass and MSD ignition. Spark plugs have also been changed.
Car went into limp mode and no codes, no SES light.
I have an '89 Formula 350 that is running rich all the time. I am pulling my hair out trying to find problem.
I replaced the plug wires, coil, distributer. It has a new TPS, O2 sensor with tb coolant bypass and MSD ignition. Spark plugs have also been changed.
Car went into limp mode and no codes, no SES light.
Last edited by formula89utah; Jun 3, 2008 at 11:05 AM. Reason: Added info
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If it didn't turn on the SES light or set a trouble code, and for sure went into limp home mode, it's probably the ECM itself.
Thread
Thread Starter
Forum
Replies
Last Post
david068513
Camaros for Sale
0
Sep 18, 2015 10:36 AM
