Odd symptoms, did I fry the EEC? July 03, 2006, 07:11:03 PM I replaced the TFI/PIP two days ago and after I reset the timing on my '85 3.8L Cougar. I went to pull the codes to see what was there (I pulled a KOEO 23 a few days earlier, it's been there a while)...as I hooked up my multimeter, relays and other such things began to click. That struck me as odd...I checked out the multimeter and noticed the positive input was on the 10A fused input, and not the V input. I swapped the positive input to the correct terminal (multimeter was set to DC Volts setting the entire time) and tried again. With KOEO, the voltage on the meter was 9.7V. As codes came in, voltage would drop to 6.2V. So instead of going to 0-12-0...it goes 9.7-6.2-9.7. It gave me 23 (TPS) and 87(Fuel pump primary circuit failure). I went to crank the car and noticed the fuel pump didn't come on. It started and ran for a few seconds until the fuel ran out. I grounded out the fuel pump wire on the Self-Test and the pump ran. With the wire grounded, I could crank and run the car. So...any ideas? Quote Selected
Odd symptoms, did I fry the EEC? Reply #1 – July 03, 2006, 10:58:53 PM Doesn't sound good.... The times I've see non functioning fuel pumps because of no ground signal, was when the EEC had a problem...Somehow doesn't seem logical you could damage it just mis-connecting the VOM, thats a very high impedance device... Quote Selected
Odd symptoms, did I fry the EEC? Reply #2 – July 04, 2006, 01:19:52 AM that fuel pump thing happened to me a little over two years ago. It ended up being my eec was not providing the required ground to the fuel pump relay on pin 22. By you manually giving it a ground on the tan /light green wire tells the whole story. the eec is responsible to provide that ground. Tom walked me through this one back then before i had my EVTM.I think i fouled my old eec up by doing what i should not have done at the relay in the trunk. Wish i had my evtm back then instead of shooting in the dark. Quote Selected
Odd symptoms, did I fry the EEC? Reply #3 – July 04, 2006, 11:18:32 AM I've got a spare EEC that I'll put in tomorrow to see if it fixes things. Quote Selected
Odd symptoms, did I fry the EEC? Reply #4 – July 04, 2006, 01:41:29 PM Sounds like you used the ammeter. That is pretty close to a dead short. Quote Selected
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