Crazy Electrical issue with EFI system

Cameroonski · 04-30-2010, 11:11 PM

Here's the update...

The Check Engine light was not coming on with the ignition on. It DOES come on when terminal W is connected to E1 (computer ground) as well as a body ground. The computer ground into the engine block is good.

I'm also getting these voltages...

BATT has 12v
M-REL still has about .08v
IG S/W had about 1.23v
+B is not getting anything

Also, on the Diagnostic Box...

From +B and the battery i have 12v, and from Fp and the batter i have 12v, but both to the same side of the battery and when i test it in between them it is 0v. Im not sure if this means anything...

All of this seems like the ECU is funky, but i have tried two different ECUs, and i find it highly unlikely that the same odd problem would lie in both. So short circuit somewhere maybe?

Please i need some help..

04-30-2010, 11:11 PM	#9
Cameroonski 3" Exhaust Join Date: Dec 2009 Location: Austin, Tx Posts: 68	Here's the update... The Check Engine light was not coming on with the ignition on. It DOES come on when terminal W is connected to E1 (computer ground) as well as a body ground. The computer ground into the engine block is good. I'm also getting these voltages... BATT has 12v M-REL still has about .08v IG S/W had about 1.23v +B is not getting anything Also, on the Diagnostic Box... From +B and the battery i have 12v, and from Fp and the batter i have 12v, but both to the same side of the battery and when i test it in between them it is 0v. Im not sure if this means anything... All of this seems like the ECU is funky, but i have tried two different ECUs, and i find it highly unlikely that the same odd problem would lie in both. So short circuit somewhere maybe? Please i need some help..