What went wrong?, it was running great and then not at all |
|
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. |
|
What went wrong?, it was running great and then not at all |
Type 47 |
Mar 15 2023, 03:59 PM
Post
#1
|
Senior Member Group: Members Posts: 787 Joined: 1-June 10 From: St. Louis, MO Member No.: 11,790 Region Association: None |
so we put the original 62k engine back in that had not had the distributor removed. Adjusted the valves (again after we put about 10 miles on it) we rebuilt the Webbers and it fired up. We did some timing and tweaking on the carbs.
It ran OK but a little shy of perfect. I replaced the wires and it seemed to improve it but idled a little high around 1,200. My son came over to work on it the next day, but I wasn't home. All of a sudden, it won't even run. we swapped distributers (both 009's) with the parts car, then swapped points (adjusted to 0.016). no improvement. tested spark to all four cylinders. I seems like it's really out of timing but we didn't change it much. (except for the fact that we took the distributor out) my son says we have spark, too much fuel, and not enough air. What do we do next????? |
Superhawk996 |
Mar 20 2023, 10:02 PM
Post
#2
|
914 Guru Group: Members Posts: 6,544 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Sorry - not trying to over simplify
However tuning is an iterative process. Airflow affects idle mix, mix affects idle speed, idle speed affects timing (due to centrifugal, mechanical advance on 009), and synch between the two carbs goes right back to affecting airflow. All the above are interrelated to Venturi and jetting. It’s anything but simple. But it needs to be worked through in a methodical way with each incremental adjustment becoming smaller. Since you never got to a stable idle below 1200 rpm per your original post I can only conclude that something was not adjusted properly. Your most recent post of having popping and backfiring could at a bare minimum be tied to it getting lean as you transition off idle. |
Lo-Fi Version | Time is now: 4th December 2024 - 03:45 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 ... |