 High RPMs at start...and sticking. |
|
|
|
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. |
|
|
  |
| CptTripps |
 Jun 30 2005, 08:14 AM
Post
#1
|
|
:: Punch and Pie ::  Group: Members Posts: 3,585 Joined: 26-December 04 From: Tuscaloosa, AL and Akron, OH Member No.: 3,342 Region Association: Upper MidWest  |
This just happened last night. I was driving along and the car started accelerating with my foot off the pedal. I thought it was the carpet pushing the pedal or something. Didn't do it again, so I thought all was well.
I popped the engine bay when I got home, and it looked like I had one of the vent hoses in the way or something. Anywho... I was driving to work this morning, and the same thing happened. Then after I had breakfast, I turned the key and the RPMs shot through the roof, then went back down. The engine bay is clear, and I've lubed the cabling to the carbs. Any ideas? |
   |
 
|
| xsboost90 |
Jun 30 2005, 08:17 AM
Post
#2
|
|
Senior Member Group: Members Posts: 1,393 Joined: 2-August 04 From: cincinnati Member No.: 2,432 |
check for vac. leaks somewhere....not sure about carb troubles though.
|
|
|
|
| CptTripps |
Jun 30 2005, 09:28 AM
Post
#3
|
|
:: Punch and Pie :: Group: Members Posts: 3,585 Joined: 26-December 04 From: Tuscaloosa, AL and Akron, OH Member No.: 3,342 Region Association: Upper MidWest |
No vacuum at all that I know of...you don't have vacuum with carbs...do you?
Maybe that's the problem? |
|
|
|
| Dave_Darling |
Jun 30 2005, 10:10 AM
Post
#4
|
|
914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
|
Any time you have air flow and something creating a restriction to flow, you have vacuum. The engine is trying to suck air in, creating air flow. The throttle valve in the carb is restricting air flow--that's its function, after all! Therefore, you have a vacuum in the carb a nd manifold, "downstream" of the throttle plate.
Vacuum leaks cause all kinds of funky problems. Check between the carb and the manifold, between the manifold and the head, and all over the carb itself. The throttle valves could be sticking, somehow. Check the linkage for binding or any oddness, check the throttle plates themselves, check over both carbs. Also check the ignition system--if the advance weights stick, you can get a high idle like that sometimes. --DD |
|
|
|
| CptTripps |
Jul 2 2005, 08:13 AM
Post
#5
|
|
:: Punch and Pie :: Group: Members Posts: 3,585 Joined: 26-December 04 From: Tuscaloosa, AL and Akron, OH Member No.: 3,342 Region Association: Upper MidWest |
Fixed it....here's what it was. 2 part problem, bith working in conjunction with eachother.
#1 - the linkage was getting caught up on the Coil. Easy fix. #2 - the rear air cleaner screw came undone from the pass-side carb. It is about 8" long, and fell down on top of the rear linkage. So it was making it stick. Case closed... |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 03:10 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.