EEC Self Test starts on its own...what's going on???

QuantumMotorsports · 02-12-2001, 01:13 PM

Sounds like either a major prob with the eec or a simple problem like wire harness shorts(possibly intermittent) Do you have access to a DMM? (digital multimeter) You need to get an ohm meter at the wire harness. Get a wiring diagram of your car (public libraries have chiltons on microfilm sometimes. But once you have a wire diagram, see if you can't find any shorts. I know, it sucks a whole lot having electrical problems, imagine this... A squirrel chewed up my main harness connector that goes into the car through the firewall (the one that carries all the wires to the eec) I had to go at it with a soldering iron and a wiring diagram until I got it back together, I still have some minor probs from it. But, the self test thing sounds like either, you have some weird short that causes it to think you've got a scan tool attached, or the eec is screwed. Good luck man.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, P&Ped heads, 2.25" custom mandrel bent dual pipes, T5 five speed tranny
15.43 @ 91.08mph (not shabby for a 3600 pound car)
60' 2.453 Street tires suck!!!

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02-12-2001, 01:13 PM	#1
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	Sounds like either a major prob with the eec or a simple problem like wire harness shorts(possibly intermittent) Do you have access to a DMM? (digital multimeter) You need to get an ohm meter at the wire harness. Get a wiring diagram of your car (public libraries have chiltons on microfilm sometimes. But once you have a wire diagram, see if you can't find any shorts. I know, it sucks a whole lot having electrical problems, imagine this... A squirrel chewed up my main harness connector that goes into the car through the firewall (the one that carries all the wires to the eec) I had to go at it with a soldering iron and a wiring diagram until I got it back together, I still have some minor probs from it. But, the self test thing sounds like either, you have some weird short that causes it to think you've got a scan tool attached, or the eec is screwed. Good luck man. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, P&Ped heads, 2.25" custom mandrel bent dual pipes, T5 five speed tranny 15.43 @ 91.08mph (not shabby for a 3600 pound car) 60' 2.453 Street tires suck!!!