91 FC not detecting ECU anymore :(
#1
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91 FC not detecting ECU anymore :(
so i pulled my ecu to check if anything was burnt and it all looked good i screwed it all together and plugged her in now my CEL dash light isnt even on with the ignition on and it wont start anymore? wth is going on
#2
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iTrader: (1)
You said it looked good, but it looked like the circuit board was molded. And now you presently have 3 threads for the same problem. And you would think you would supply the pics of your ECU in this thread.
Have you checked for spark? Do you know how to deflood an S5?
Have you checked for spark? Do you know how to deflood an S5?
Last edited by satch; 05-24-16 at 10:21 AM.
#3
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i only made this one because theyre all different topics itll get more attention in this threat with this title for this problem and i mean it did look good nothing looked burnt at all but it was working before i unplugged it all i did was unscrew it all and look at it didnt use any force at all so then i plugged it in and nothing would happen and its not even flooded the plugs are dry after trying to start it a few times and theyres no spark now im guessing cuz the ecu **** the bed! im clueless right now
#5
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i checked for spark the old fashioned way by putting it on the fender and turning it over and looking at it and there was nothing i tried all 4 plugs :/ no luck its just ever since i took the ecu out it got messed up
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#8
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i just checked under my dash the radio one was blown and the room one whatever that is lol it sticks out a little but i put new ones in and no luck also i checked the box under the hood they all appear to be okay...i even switched the 30s around to see if that helped but still now power or something to the ecu
#10
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#15
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yeah that fuse is fine and there is no power going to the relay. the only click i hear is one of the solenoids or w.e in the engine bay! im just confused the car ran then i wanted to check the ECU for burnt stuff and i plugged it back in then now this is happening
#20
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oh yes okay yeah i unbolted it and looked at it and it had like 6 wires coming out of it lol so i unplug them and test the volts from the harness end of the cable?
#22
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So, W/L and W/R both have close to 12 volts but the B/Y wire at the lead or trailing coil has very little if any voltage w/key to on? And the relay needs to be plugged in since the White wires are run to the relay so the relay can relay the voltage to the other wires (B/W and B/Y).
#23
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So, W/L and W/R both have close to 12 volts but the B/Y wire at the lead or trailing coil has very little if any voltage w/key to on? And the relay needs to be plugged in since the White wires are run to the relay so the relay can relay the voltage to the other wires (B/W and B/Y).
#24
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No. There are 4 wires in one plug. You stated both White wires had voltage. You were then asked to test the voltage on the B/Y and B/W wire in the 4 wire plug. Now you just stated that you unplugged the relay and said they have 12 volts each. Wrong. They could not possibly have voltage w/the relay unplugged because they receive voltage from the White wires w/key to on. All plugs need to be checked when testing for voltage on the B/Y and B/W wire w/key to on.
#25
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i checked them all i did the 2 wired FIRST got almost 12 then i tested the whites got almost 12 and moved up to the other 2 and almost got almost 12 and the key was on at all times. i tested the wires from the harness as if i could of put the relay on the ground AFTER i did the 2 wired one