Car not starting, how to diagnose
#1
Car not starting, how to diagnose
My car refused to start today. I drew few laps around the city, stopped, went outside, came back and no go.
Disconnected the battery, ran KOEO test, error 542 "Fuel Pump circuit open; PCM to motor"/"Fuel pump open, bad ground or always on - - ". From the sound it seems that fuel pump is not working during KOEO.
I've seen this code before, but the car was running fine. Now it won't start, it'll crank for hours, but no start.
The fuse under hood is not damaged. The car was hitting with electricity when I was getting out of it after cranking. Now it doesn't do that.
Do you know how to find an open wire if it's the case or what should I diagnose?
Where is the fuel pump wiring going through?
Disconnected the battery, ran KOEO test, error 542 "Fuel Pump circuit open; PCM to motor"/"Fuel pump open, bad ground or always on - - ". From the sound it seems that fuel pump is not working during KOEO.
I've seen this code before, but the car was running fine. Now it won't start, it'll crank for hours, but no start.
The fuse under hood is not damaged. The car was hitting with electricity when I was getting out of it after cranking. Now it doesn't do that.
Do you know how to find an open wire if it's the case or what should I diagnose?
Where is the fuel pump wiring going through?
#3
#4
After going through a lot of wires I traced it down aftermarket immobilizer (secret switch) problem, now the car is running again.
Still, I will have to check that 542 code though, because it seems it's persistent even the car runs just fine. It's quite possible that guys who were adding the immobilizers and alarms, did something wrong. I will reset the codes and if they'll come back I'll have to do some wire tracing.
By the way, do you know where the fuel pump relay is on a '95 GT?
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