Troubleshooting: 2.0 won't stay running |
|
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. |
|
Troubleshooting: 2.0 won't stay running |
Nate |
Nov 26 2014, 03:36 PM
Post
#1
|
Newbie Group: Members Posts: 47 Joined: 21-August 14 From: Southern California Member No.: 17,807 Region Association: Southern California |
Hey everyone! Hope you are all preparing for a nice thanksgiving.
Wanted to see what ideas you guys had about my original FI 2.0 from 73. Some of you may have seen a few other threads of mine but I'll give a little synopsis. I rebuild the motor in my garage. New Pistons and cylinders, all new bearings, lifters. Ground crank and cam. Heads rebuilt by a reputable shop. For the rest of the car. New fuel lines, cleaned and coated fuel tank. New fuel filter. Cleaned and flow matched fuel injectors. Rebuilt distributor. Tuned dwell angle and set static timing. So I've done all of that and the car won't stay running. It'll start and run for 20 seconds with a high idle (approximately 2500 rpm's) and then it will die even if I'm feathering the throttle. I'm looking for ideas as to what and how to troubleshoot the car. IF this car was a person I'd strangle it to relieve my frustration. P.S. I went through the ecu harness and ohm'd everything out and there are no shorts in the wiring and the grounds are solid. I also replaced the throttle position switch and have that set up according to the book and have messed with the idle mixture knob a bit. Anyone have any ideas on where I should go from here? Thanks and I wish everyone a good safe holiday. |
Nate |
Dec 5 2014, 02:20 PM
Post
#2
|
Newbie Group: Members Posts: 47 Joined: 21-August 14 From: Southern California Member No.: 17,807 Region Association: Southern California |
I tested the injectors on the car.
Just wanted to let you guys know that I found the problem. Apparently, at some point, one of the bolts holding on the rocker assembly for cylinder 4 stripped right off the stud. I checked compression yesterday and was getting 30 psi on cylinder 4. So I popped the valve cover off and the issue was staring me right in the face. So I'm happy that I found the issue but also a bit confused as to how this occurred. Valves were all adjusted to spec during the rebuild. I guess it's possible that I cross threaded the bolt onto the stud but I was very careful during the process. Both the stud and the bolt threads were stripped. |
914_teener |
Dec 5 2014, 03:36 PM
Post
#3
|
914 Guru Group: Members Posts: 5,200 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
I tested the injectors on the car. Just wanted to let you guys know that I found the problem. Apparently, at some point, one of the bolts holding on the rocker assembly for cylinder 4 stripped right off the stud. I checked compression yesterday and was getting 30 psi on cylinder 4. So I popped the valve cover off and the issue was staring me right in the face. So I'm happy that I found the issue but also a bit confused as to how this occurred. Valves were all adjusted to spec during the rebuild. I guess it's possible that I cross threaded the bolt onto the stud but I was very careful during the process. Both the stud and the bolt threads were stripped. Question: Did you degree the cam in at zero lash? Or did you set the lash and then degree the cam? |
Lo-Fi Version | Time is now: 29th May 2024 - 05:32 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 ... |