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L-jet injection issue
Posted: Mon Mar 31, 2014 11:38 pm
by spider98664
'81 E12 5 speed. US spec.
My relay box on top of the brake booster has signal from the ecm, but no power to fire the injectors when the relay closes. Is there a fuse someplace that is bad?
If I bring power with a jumper to the pin it starts right up.
Also, I think I have 2 bad injectors. Local German specialist cannot get them. Sources?
Thanks!
Re: L-jet injection issue
Posted: Tue Apr 01, 2014 4:30 am
by Falkenberg
Would that be the combo relay? Search on the board, these kind of issues have been discussed many times.
There is also useful stuff on the FAQ:
http://www.firstfives.org/faq/ljet/combo_fix.html
http://www.firstfives.org/faq
Posted: Tue Apr 01, 2014 11:14 pm
by Mike W.
Combo relays are a known problem, they're the double relay.
Injectors? The usual suspects, Autohausaz, Rockauto, Amazon.
Combo relay
Posted: Wed Apr 02, 2014 12:14 am
by spider98664
I checked the relay carefully and all the solder joints are good. The diodes work properly. There is no voltage (hot) to the relay.
Re: Combo relay
Posted: Thu Apr 03, 2014 9:17 am
by Falkenberg
That should not be very hard to track down?
I know some L-jet supply only at start or run (AFM switch) 12V to some parts of the relay, but I never had an L-jet myself.
A multimeter and electric schematics should be all you need.
Posted: Wed Apr 16, 2014 1:16 am
by spider98664
I jumped power to the output wires that go to the injectors and it started right up.
A replacement relay solved the problem all together.
Thanks for the help.