1.7l starting issues, motor starts if I disconnect cyl 4 injector cable |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
1.7l starting issues, motor starts if I disconnect cyl 4 injector cable |
b.stirbu |
Aug 9 2015, 04:14 PM
Post
#1
|
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) |
euro911 |
Aug 19 2015, 01:14 PM
Post
#2
|
Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
Check all vacuum connections for leaks (repair/replace as needed) *
Verify/adjust valve clearances * Verify/adjust dwell angle * Check trigger points * (clean contacts & lube shaft - or replace as needed) Verify/adjust ignition timing * Verify functionality of individual components (which I believe you've already done - repair/replace as needed) * (if not already done) There is also an adjustment on the throttle body but should be the last item to adjust after performing the steps above. I did all these things to get my wife's 1.7L to run (and idle) properly. Unfortunately, I did everything at once, so I never determined if any one of them by itself corrected the problem. |
Lo-Fi Version | Time is now: 9th June 2024 - 08:14 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |