![]() |
|
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. |
|
![]() |
r3dplanet |
![]()
Post
#1
|
Senior Member ![]() ![]() ![]() Group: Members Posts: 679 Joined: 3-September 05 From: Portland, Oregon Member No.: 4,741 Region Association: None ![]() |
Because I can't leave things alone, and maybe because I'm always trying to figure out the last 3% of why my 1971 1.7l engine doesn't purr exactly right, I spent some time with the Haynes manual to look things over.
I thought I had checked out the fuel pressure valve before, but I never really have. The book says (as do several knowledgeable D-Jet wizards) to set the pressure at 30psi. Mine is set to 35psi. Five pounds too much. Huh. So I adjusted it back to 30psi and the car ran terrible. I thought there might be a change in timing and I was right, but even by re-timing the engine it still ran horrible. So I pushed it back to 35psi. Now it works. Mostly. But this raises a question. Why is it set so high? I nudged it up a little higher to 36 or so and it actually ran a tiny bit better. I don't like setting it so high, so I'm confused. The fuel pump isn't stock as far as I can tell. Or least it doesn't look at all like the one in the Haynes manual. Any thoughts? |
![]() ![]() |
benalishhero |
![]()
Post
#2
|
Member ![]() ![]() Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States ![]() |
My 2.0 had the same problem for two summers. The car ran great at a high PSI but when I brought it down to spec it would run like crap. It ended up being partially clogged injectors. Well actually just the two new injectors I had in the car were having "spray issues".
It turns out the E-10 gas we have in the northeast was the culprit. Now I use a fuel stabilizer with ethanol treatment and the problem has not returned this summer. |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 28th June 2024 - 12:35 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 ... |