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) |
Valy |
Aug 11 2015, 08:50 AM
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#2
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Senior Member Group: Members Posts: 1,676 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Ok. Did you try to disconnect the new #4 wire or the injector connected to old #4 and start.
This will isolate the culpit to the injector or wire. Too much pressure can hold the injector open but you said you tested them outside the car. Also, why is it a problem only when the wires are connected? |
b.stirbu |
Aug 12 2015, 04:20 AM
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#3
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1974 daily driver Group: Members Posts: 27 Joined: 14-June 15 From: Netherlands Member No.: 18,848 Region Association: Europe |
Ok. Did you try to disconnect the new #4 wire or the injector connected to old #4 and start. This will isolate the culpit to the injector or wire. Too much pressure can hold the injector open but you said you tested them outside the car. Also, why is it a problem only when the wires are connected? The injector is not the problem, because I've swapped the injectors. And i also know they work...I need to dig into this? Is it normal that the fuel pump cables are buzzing(like they are short circuited? |
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