bad injectors? no. 2, 4 and 6

[bogdan wst]

hello. first of all excuse my grammar because i am from Romania. i ran into a problem today with my 325i (1989, motronic 1.3, 173 ECU) and i hope you can give me some advice. here it is: at some point my engine started going really bad and eventually die. after checking for vacuum leaks, false intake air, distributor cap, rotor, plugs, spark plugs i disovered what doesn't work normally. i took out the injector ramp and i noticed that injectors no. 2, 4 and 6 do not spray gas at all . i replaced injector 5 with 6 and saw that the injector that was in position no. 6 on the ramp (and didn't work then) wors normally if put on position no. 5 on the injector ramp. so, what could it be the cause of my problem? should there be a fuse or a relay that i should check? or it may be an ECU problem? i would be more than gratefull if you could help me with some sugestions. thank you very much.

[jlevie]

The injectors are organized in two banks (1,3,5 and 2,4,6). Since Bank 2 injectors aren't firing, either power isn't reaching that bank or the firing signal isn't reaching that bank. The most common cause of this would be a problem with the C191 connector located under the intake manifold. But it could also be a problem with the Bank 2 output circuit in the DME.

Check C191 for corrosion on the contacts and where the the wires mate to the contacts. If there is corrosion damage it is best to splice in a new C191 connector.

[bogdan wst]

thanks. i have just looked on that conector who's wires come from the ECU and car' wiring and the center brown/yellow wire that goes into it was so corroded that it just was ripped out (disconected). i put a new wire directly to it and to the conector that comes from the injector's electric conector ramp. i'll see how it goes.

p.s. what is DME and what is "the Bank 2 output circuit in the DME".
thank you again

[bogdan wst]

thanks a lot! that was it. PROBLEM SOLVED :D