Weird fuel injector issue, constantly firing.

[ZekeTheSneak]

Well I have a s52 running obd1 in my 318is. The thing sat most of the winter and well the gas went bad. long story short I've been getting it going again but the number two injector is constantly firing flooding the engine.

I first noticed by putting a ghetto stethoscope against it and hearing that it isn't clicking like the rest. Well I pulled it out and took it to doctor injector. They tested it and it checked out fine and within spec. I get it home and same issue. So I pull the rail and harness and turn the key. Number two starts firing until the rail is discharged.

So now I grab my meter and pop the cover off the injector harness. I test voltage on the left and right pins, left is 12v and the right is .3ish volts. Now the other injectors read out at 12v and 12v which i believe is normal.

So is my injector failing internally or is there a broken wire somewhere?


Thanks guys, I wish I never swapped out the m20...

[328ijunkie]

Ecu is my bet.

Shoulda kept it obd2 ;)

[ZekeTheSneak]

I love you and all but you wrote the tune...

[328ijunkie]

I love you and all but you wrote the tune...

I'm saying ecu not tune ;)
Failed injector driver was my guess.

[ZekeTheSneak]

Can I swap the EPROM from the tuned redtop to another or do you have to do that service personally?

[328ijunkie]

Pull chip carefully, throw into another red or silver 413

[ZekeTheSneak]

I will try that later today. You prettt sure thats the issue?

[ZekeTheSneak]

Well you were right. Fired right up. Is the other dme worth anything?