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91 740 Regina Computer Failure

Chris,
Haven't gotten underneath to check speedo wires from rear end...
As for No-Start: Bought a used computer, installed it, charged battery while waiting, cleaned bot terminals. After installing it the brick started & ran for about 10 minutes in driveway. Shut her off, restarted fine. Shut her off again and checked for codes: 2-2-3 (IAC) when I tried to find the IAC, I came across a thing below throttle body that looks kinda like it but the book I have says 3 wire connector, and this had only 2.
As for your recommendations, here are results:
Coil: .5 ohms on low side 4.87Kohms high to low (book says about 5Kohms)
assuming this is ok, I verified just less than battery voltage at connector (pin A) and good grounds. Checked Crankshaft sensor: Wires have lost the insulation from most of it. It has 3 pins on connector with 2 actual wires. I was able to ring out which was the shield(ground)and then measured other two: 181 ohms (book says 200-500) based upon this and the appearance of the wires, I'm thinking there is my problem!
EFI Relay: Fuel pump runs with key to run, so I think this is good. No radio in the brick, someone stole it before I bought her - Can these relays be tested?






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New 91 740 Regina Computer Failure [700][1991]
posted by  WhiteHorses  on Sun Nov 10 13:43 CST 2002 >


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