Electrical Mysteries
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Junior Member
Joined: Aug 2003
Posts: 20
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From: Ontario, Canada
Car: 91 Z28 All Original
Engine: LB9
Transmission: 700R4
Electrical Mysteries
I have a 91Z28, LB9, Auto,100kms.
Lately I'm having the electrical fan switching on about 5 seconds after I start a cold engine, my electronic speedometer does not work until I've driven for 5 or 10 minutes and sometimes the engine stays at ahigh idle 1200rpm.
The ECM has not thrown any codes.
Any ideas on what's going on? THX
Lately I'm having the electrical fan switching on about 5 seconds after I start a cold engine, my electronic speedometer does not work until I've driven for 5 or 10 minutes and sometimes the engine stays at ahigh idle 1200rpm.
The ECM has not thrown any codes.
Any ideas on what's going on? THX
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iTrader: (1)
Joined: Oct 2001
Posts: 1,056
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From: decatur IL
Car: 86 iroc, 87 iroc, 89 iroc, 89 formula, 84 supra, 85 trans am
Engine: t\a motor 355 lt1 intake, t56,the works, 89 roc 427 sbc tt project
Transmission: to many to list
Axle/Gears: 9bolt 4:10 in the T/A
check your grounds, there are as follows- one from batt to body. one from batt to engine. one or two from engine to the firewall (the ground straps in the back that mount to the head), from the body to the dash board structure. those are the most important ones. if any of those are broke then weird **** will happen.
good luck
anthony
good luck
anthony
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