 one side shakes, carbs? |
|
|
|
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. |
|
|
  |
| itsaporsche914 |
 Jan 13 2010, 05:27 PM
Post
#1
|
|
Member  Group: Members Posts: 169 Joined: 5-August 05 From: cave creek az. Member No.: 4,541  |
74 2 with 44 webbers. pops and back fires through the carbs. doesnt happen when idling or gettin on it. right side seems to shake though on idle. very noticeable. any ideas?
|
   |
 
|
| yeahmag |
Jan 13 2010, 05:31 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,421 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California 
|
You have to do your homework here... Start by adjusting the idle mixture screws. If the carbs don't respond check for a plugged idle jet. You should also verify all the standard tune up stuff; timing and valve adjustment.
|
|
|
|
| itsaporsche914 |
Jan 13 2010, 05:36 PM
Post
#3
|
|
Member Group: Members Posts: 169 Joined: 5-August 05 From: cave creek az. Member No.: 4,541 |
QUOTE(yeahmag @ Jan 13 2010, 03:31 PM)  You have to do your homework here... Start by adjusting the idle mixture screws. If the carbs don't respond check for a plugged idle jet. You should also verify all the standard tune up stuff; timing and valve adjustment. how often do the valves need adjusting. also i know i have a intake leak. when turning the air mixture screw all the way in on just one barrel theres no change in idle |
|
|
|
| aircooledtechguy |
Jan 13 2010, 05:39 PM
Post
#4
|
|
The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
If it's shaking that usually means one or more cylinders are not firing (or there's no fuel to ignite. Check the plug wire routing correct order on cap and correct cylinder. Either feel for a cold exhaust pipe or pull one plug wire at a time while running to find out the offending cylinder.
Then you can determine if it's spark or fuel related. If fuel related, I would start w/ cleaning the jets and re-setting the mixture screws. Then a full sync. |
|
|
|
| Mark Henry |
Jan 13 2010, 05:41 PM
Post
#5
|
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Linkage is the #1 cause of sync issues.
|
|
|
|
| aircooledtechguy |
Jan 13 2010, 05:42 PM
Post
#6
|
|
The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
QUOTE(itsaporsche914 @ Jan 13 2010, 03:36 PM) also i know i have a intake leak. Get the vacuum leak fixed as this could be the genesis of all your problems. QUOTE(itsaporsche914 @ Jan 13 2010, 03:36 PM) when turning the air mixture screw all the way in on just one barrel theres no change in idle A clogged idle jet will cause this. . . |
|
|
|
| aircooledtechguy |
Jan 13 2010, 05:43 PM
Post
#7
|
|
The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
QUOTE(Mark Henry @ Jan 13 2010, 03:41 PM) Linkage is the #1 cause of sync issues. (IMG:style_emoticons/default/agree.gif) |
|
|
|
| SirAndy |
Jan 13 2010, 07:03 PM
Post
#8
|
|
Resident German Group: Admin Posts: 41,625 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
If you can't remember the last time the valves were adjusted, start there ...
Everything else will be a complete waste of your time if the valves are off. (IMG:style_emoticons/default/shades.gif) Andy |
|
|
|
| geniusanthony |
Jan 17 2010, 12:35 PM
Post
#9
|
|
Its a brand new "Chrome-sicle" Group: Members Posts: 517 Joined: 12-December 05 From: Alexandria,VA Member No.: 5,266 Region Association: MidAtlantic Region |
If the problem is limited to just one side your floats could be set wrong, starting at the basics and working your way up will solve it. Especially if it has been awhile since the last complete tune up.
Has the car ever run right or is this ongoing? How long has it sat? |
|
|
|
| itsaporsche914 |
Jan 18 2010, 06:22 AM
Post
#10
|
|
Member Group: Members Posts: 169 Joined: 5-August 05 From: cave creek az. Member No.: 4,541 |
fixed. i took them off the car and completely took them apart to clean. ive done this twice before. kit once. i noticed one of the pump arm rollers was missing. made a couple of calls and found a shop in phoenix that had one for $20. nice guy. does sand rail and machining. these are 25 year old 44 webers. the guy said pretty good carbs. anyways i cleaned them real good put them back on and it runs like a rocket ship again. fires right up, idles and then goes. no problems. thanks for the replies
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 10th May 2024 - 08:26 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.