EEC IV problems

tekt · February 18th, 2007, 04:07 PM

I have an 89' notchback 5.0, 5 speed that has the dreaded CEL. I bought a code scanner, but can't get it to connect to the eec. When I grounded the single wire, the computer wouldn't start the self diagnostic mode. Is the eec fried?

cobraetti · February 18th, 2007, 06:16 PM

I think you could try the self-test with a digital voltmeter and see if that works?

JBIGBOOTSY · February 18th, 2007, 08:00 PM

plug it in, with the engine off. then start the car. With the car running, switch the scanner on to test, you should hear a quick blip in the engine, then it should climb to 2000k and stay there. If for some reason it can't raise the idle, it will abort the test. Mabe try and check your IAC

tekt · February 19th, 2007, 02:00 AM

The eec won't go into the self diagnostic mode at all. If the scanner is plugged into the port, still no connection to the eec, and the car stops running a few seconds later.

February 18th, 2007, 04:07 PM	#1
tekt Newbie Join Date: Feb 2007 Posts: 3 iTrader: 0 reviews	EEC IV problems I have an 89' notchback 5.0, 5 speed that has the dreaded CEL. I bought a code scanner, but can't get it to connect to the eec. When I grounded the single wire, the computer wouldn't start the self diagnostic mode. Is the eec fried?

February 18th, 2007, 06:16 PM	#2
cobraetti Regular 2001 svt cobra no way (IRS) Join Date: Aug 2006 Location: goose creek,sc Posts: 304 iTrader: 0 reviews	I think you could try the self-test with a digital voltmeter and see if that works? __________________ Build #1249 MM New Edge Crew Member# 6

February 18th, 2007, 08:00 PM	#3
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,392 iTrader: 0 reviews	plug it in, with the engine off. then start the car. With the car running, switch the scanner on to test, you should hear a quick blip in the engine, then it should climb to 2000k and stay there. If for some reason it can't raise the idle, it will abort the test. Mabe try and check your IAC __________________ Bolt-on Abraham Lincoln Log motor. With extra wiring.

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February 19th, 2007, 02:00 AM	#4
tekt Newbie Join Date: Feb 2007 Posts: 3 iTrader: 0 reviews	The eec won't go into the self diagnostic mode at all. If the scanner is plugged into the port, still no connection to the eec, and the car stops running a few seconds later.

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