Timing woes, I wish I wish I hadn't killed that fish! |
|
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. |
|
Timing woes, I wish I wish I hadn't killed that fish! |
mike_the_man |
Apr 22 2004, 09:07 PM
Post
#1
|
I like stuff! Group: Members Posts: 1,338 Joined: 11-June 03 From: Regina, Saskatchewan, Canada Member No.: 809 |
Hi all,
My car was running like piece of poop recently (74 2.0L with F.I.), but backing off the timing a little made it run a fair bit better. Today I took it for a little drive, got it nice and warm, and decided to try and re-time it. It turns out that my timing was correct when it was running poorly, and now I'm very confused. I checked top dead center on the fan and on the fly wheel, as well as looking at the position of the rotor. Everything points to top dead center. I then put a new mark on the fan at 27 degrees as per the PP tech article. I also found the 27 degree mark on the fan, and it lines up with the mark that I made. When I rev my car up to 3500 rpm and set the timing to the 27 degree mark (I disconnected the vacuum hose from the dizzy) the car runs like crap. But if I set the static timing (not revving the car up, but setting it at idle) to 27 degrees, it seems to run pretty good. I'm totally confused. Could it be that the mechanical advance isn't working? Is there any way to test the mechanical advance? What would the symptoms be? I hope this all makes sense, and I'm sorry for the long post. Thanks for all ideas. A (IMG:style_emoticons/default/beer.gif) to the first person that gets it right. |
SLITS |
Apr 22 2004, 10:42 PM
Post
#2
|
"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
If you put a new mark on the fan at 27 and then found the existing 27 mark and they aren't on top of each other - something is bad wrong.
By popping the dizzy cap and applying vacuum to the advance pot, you should see the breaker plate move. Do you have the advance and retard vacuum pot hoses hooked up correctly? If the are switched, the retard would be active during acceleration - bad bad. |
Lo-Fi Version | Time is now: 8th June 2024 - 05:27 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 ... |