The Dreaded Idle Mystery, Idle Me This |
|
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. |
|
The Dreaded Idle Mystery, Idle Me This |
Apexster |
Jan 2 2020, 03:05 PM
Post
#1
|
Newbie Group: Members Posts: 8 Joined: 1-June 18 From: Concord, CA Member No.: 22,180 Region Association: Northern California |
Looking for a little insight on the dreaded idle mysteries of a 1974 2.0 914. I've searched the archives for a couple months and tried just about everything.
Valves freshly adjusted. Compression is above 135psi and within 2% on all cylinders. Original D-jet intact with new hoses and all components tested and working. Fuel pressure tested (30-31psi from original 3 hose fuel pump). New plug wires, newly rebuilt distributor, recent fuel filter. I'm about to replace the 20 year old CHT sensor as well. The car revs smoothly and pulls very strong. Engine runs great anywhere above 1200 rpm. Problem is 3 or so minutes after a cold start it drops off the high idle and transitions to a rough idle, like it's running on three cylinders. When I spray carb cleaner in the air cleaner the idle smooths out immediately. Has anyone else come across this issue and perhaps suggest a plan of action to resolve it? (IMG:style_emoticons/default/confused24.gif) Thanks and Happy New Year to All. |
Rand |
Jan 2 2020, 07:06 PM
Post
#2
|
Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
I appreciate Brad as much as we all do.
Spacers that were never factory are band aids. Can we stop the band aids and get to the real problem? We need a baseline. Obviously there's something else wrong. Please don't try patching it other ways. Fix the source of the problem before you chase mysteries the rest of your car life. |
porschetub |
Jan 5 2020, 04:03 PM
Post
#3
|
Advanced Member Group: Members Posts: 4,703 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
I appreciate Brad as much as we all do. Spacers that were never factory are band aids. Can we stop the band aids and get to the real problem? We need a baseline. Obviously there's something else wrong. Please don't try patching it other ways. Fix the source of the problem before you chase mysteries the rest of your car life. Have no idea why you are rubbishing this part,Brad knows his stuff and appears these have worked for many people,read an old thread from on here and they were a factory part,they became NLA and Brad started making them,Paul Anders mentioned the one he fitted worked well....do some research man (IMG:style_emoticons/default/type.gif) . |
Lo-Fi Version | Time is now: 1st June 2024 - 04:20 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 ... |