check engine light when I hit a bump
Thread Starter
Senior Member
Joined: Feb 2000
Posts: 581
Likes: 0
From: US
Car: 86 iroc
Engine: 305
check engine light when I hit a bump
I just installed a air/fuel gauge and when I hit a hard bump the check engine light comes on.The car doesnt die but it acts like it does when the four wire distributor connector is unplugged.It clears right up.I tried shaking the wires with the car running in the drive way,but it wont do it.Could this be a bad ground on the new gauge?Its a 86 lg4 and it shows no codes.
------------------
~mike~86 IROC-Z
Joined: Mar 2001
Posts: 505
Likes: 0
From: Western NY
Car: 84 T/A
Engine: 305HOL69
Transmission: 700R4
Axle/Gears: 3.42
Are you still running the stock ECM and carb/distrib? Sounds like maybe your knock sensor is picking up a phony frequency on a really hard bump, happens to me every now & then if I can't dodge a pothole in time. Otherwise, something's gotta be loose somewhere. If it happens again, see if you can catch the code while the light's still on and that would tell you.
------------------
DR Stevens
1984 Trans Am 305HO L69
sucks gas, hauls ***
1991 Firebird 305 LO3
for days when I need a/c
------------------
DR Stevens
1984 Trans Am 305HO L69
sucks gas, hauls ***
1991 Firebird 305 LO3
for days when I need a/c
Thread Starter
Senior Member
Joined: Feb 2000
Posts: 581
Likes: 0
From: US
Car: 86 iroc
Engine: 305
I dont think the 86 lg4 has a knock sensor ,only the l69,could be wrong.I dont thik its a ecm or code problem,im losing the power to the ignition somewhere.Last night I went out and it wouldnt crank,had power but no juice to starter,i jiggled the wire going to ecm?(fused)and it started so i guess i have a short between the batt.and starter or accessory wire?
------------------
~mike~86 IROC-Z
------------------
~mike~86 IROC-Z
Thread
Thread Starter
Forum
Replies
Last Post
