Weird limp mode while driving problems.
Thread Starter
Joined: Jul 1999
Posts: 12,100
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Weird limp mode while driving problems.
Hey,
Ever see a 165 (or any other) go into limp mode while driving, then pull itself back out?
I'll get solid check engine, and like. the thing will be a pig. won't accelerate hardly (seems like no timing?) nothing.. Shut down, restart. No blink on the check engine to verify prom is good. Start, solid check engine. No codes, etc.
Will continue driving, check engine will come out and it will run normally again. This happens once and a while.
Another. oddity, is while idling. the tach will DROP TO ZER0, from like a 700rpm idle. But the engine doesnt stall, it will hardly hickup (but will hickup a little).. Weird.
I was thinking a bad solder int he socket, btu it shouldn't pull back out of limp should it?
-- Joe
Ever see a 165 (or any other) go into limp mode while driving, then pull itself back out?
I'll get solid check engine, and like. the thing will be a pig. won't accelerate hardly (seems like no timing?) nothing.. Shut down, restart. No blink on the check engine to verify prom is good. Start, solid check engine. No codes, etc.
Will continue driving, check engine will come out and it will run normally again. This happens once and a while.
Another. oddity, is while idling. the tach will DROP TO ZER0, from like a 700rpm idle. But the engine doesnt stall, it will hardly hickup (but will hickup a little).. Weird.
I was thinking a bad solder int he socket, btu it shouldn't pull back out of limp should it?
-- Joe
Thread
Thread Starter
Forum
Replies
Last Post
maroe624
Transmissions and Drivetrain
4
Apr 16, 2017 08:29 AM
Omega
Engine/Drivetrain/Suspension Parts for Sale
9
Oct 1, 2015 02:20 PM
db057
TBI
10
Aug 11, 2015 10:11 PM
novaderrik
Transmissions and Drivetrain
3
Aug 10, 2015 12:44 PM





