 idf a/f idle mixture needle screws, chasing persistant prob |
|
|
|
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. |
|
|
| rhodyguy |
 Jun 30 2006, 10:02 AM
Post
#1
|
|
Chimp Sanctuary NW. Check it out.  Group: Members Posts: 22,098 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch  |
still chasing it. i replaced the the mallory cap and rotor.
1. persistant rough idle. 2. loss of power while climbing grades. 3. when i turn the screws in on the 1/2 cyl carb the idle quality change is not as appearent as the other carb. 4. coming to a stop the idle will fall way down and slowy pick up. the newer looking one is on the left ( out of one of the 44s i have) and the one on the right is the style currently in the car. very obvious design difference. o ring sealing the screws are flattend out and look suspicious. does anyone know if the port design was changed during production? will the "newer" needle work as a replacement of the "old" style, or just swap out the the o-ring? old ring is on the left. my thought is a defective ring would let air sneak through giving an inacurate adj on the mixture plug pict is of one from the "bad" side of the engine and has about 500 miles on it. electrode is clean, color seems about right, so i think the "spark" is not an issue. thoughts? k Attached image(s)   
|
   |
 
|
  |
Replies(1 - 3)
| SirAndy |
Jun 30 2006, 12:43 PM
Post
#2
|
|
Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
don't know the answer but i'll give this a (IMG:style_emoticons/default/icon_bump.gif) ...
i had to buy extra o-rings for my 44 IDFs as the rebuild kit didn't have enough ... (IMG:style_emoticons/default/dry.gif) Andy |
|
|
|
| lapuwali |
Jun 30 2006, 01:03 PM
Post
#3
|
|
Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
The long, tapered screws are, IMHO, the "good" screws to use. They actually allow some adjustment. The newer stepped screws are basically on/off.
|
|
|
|
| rhodyguy |
Jun 30 2006, 01:59 PM
Post
#4
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,098 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
spark you could weld steel with on the bad carb side. blew out the jets, and circuit. idle a/f needle valves no effect on one barrel and minimal effect on the one next to it. i took them to Carbs Unlimited (local firm) they'll be ready on monday.
i can't complain. they were on an engine in total i bought in late 02'. cleaned up the engine, put it in the car and i've been driving it since. italian made 40s. k |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th June 2024 - 01:41 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.