1.7l starting issues, motor starts if I disconnect cyl 4 injector cable |
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1.7l starting issues, motor starts if I disconnect cyl 4 injector cable |
b.stirbu |
Aug 9 2015, 04:14 PM
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#1
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1974 daily driver Group: Members Posts: 27 Joined: 14-June 15 From: Netherlands Member No.: 18,848 Region Association: Europe |
Dear 914ers,
I'm quite in a pickle with my 914 1.7. The engine sometimes starts sometimes not (usually after it started, ran 5-10 seconds and then stopped and I couldn't manage to start it again). Messing arround in the engine compartment I accidentally unplugged the cyl 4 fuel injector and surprise the engine started and idled low. Tried again one, two, three times and he started succesfully, but as soon as I plug back the cyl 4 injector cable does not want to start again... What's wrong here? (the injector not, because I've swapped 3 with 4 and I still had the same problem). According to the attached current flow cyl 4 injector is in series with the cold start valve and the thermoswitch for the cold start valve.. Am I looking at the right diagram? I also don't know where current track 102 comes from. Also very interesting is that I removed the injectors 3 and 4 and placed them in two cups to see if they work, and I could start the engine in two cylinders (although the cyl 4 injector plug was connected) Cheers, Bogdan Attached thumbnail(s) |
b.stirbu |
Aug 10 2015, 12:45 AM
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#2
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1974 daily driver Group: Members Posts: 27 Joined: 14-June 15 From: Netherlands Member No.: 18,848 Region Association: Europe |
Guys, thanks for your replies. Multumesc frumos Vali!
I have no history of the car. I believe it was not used since 1990, but it was stored inside. There was a lot of gas in the oil and also had problems starting.. The initial owner passed away.. I believe he also had this problem and tried so much to start it that he injected all that gas in the cylinders. When I opened only the long block, and the rings where still looking good and the valves the same, no signs of lowered seat.. I am certain that's a electrical problem.. I interpreted the diagram in the wrong way. The IV on the diagram is related to the relay board 4 pin connector. I've tested the other injecto connectors for continuity between both wires and they all buzz, that's rather strange.. I could draw two conclusions from this situation: -The cyl 4 injector cable is faulty or cyl 4 electronics in the EFI are faulty and as soon as the solenoid is energised it affects the other cylinders also -The fault in the wiring affects the spark... |
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