 Too much air through AAR, valve? |
|
|
|
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. |
|
|
| mtndawg |
 Jan 18 2010, 11:01 AM
Post
#1
|
|
Member  Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None 
 |
I've been looking for info on the AAR and most of the discussions have been about the AAR being stuck closed. I'm wondering if mine is letting too much air through at start up? I've got my 1.7L d-jet pretty close to where I want it. When it's warm I'm idling around 900ish. Vacuum lines are new and fuel pressure is perfect.
When the engine is cold and I start it up, it jumps to 2000 to 2300 rpm. When I take the hose off the AAR it's sucking a LOT of air. Restricting it with my thumb of course drops the idle. After about 3 minutes the valve is closing and the idle drops on it's own. There's also a little white smoke at start up. What do the experts think? |
   |
 
|
  |
Replies
| SLITS |
Jan 18 2010, 11:47 AM
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  |
that's a bit high on the cold idle, but nothing critical. You might have a vacuum leak that doesn't seal until the engine is warm and metal expands.
|
|
|
|
Posts in this topic
mtndawg Too much air through AAR Jan 18 2010, 11:01 AM
ConeDodger I am no expert but it sounds like it is doing what... Jan 18 2010, 11:04 AM mtndawg Shouldn't it start to idle around 1500 to 1800... Jan 18 2010, 11:09 AM
ConeDodger
Shouldn't it start to idle around 1500 to 180... Jan 18 2010, 11:15 AM underthetire Your close enough! It depends on where the mi... Jan 18 2010, 11:14 AM pbanders I've been doing a lot of research into the AAR... Jan 18 2010, 12:26 PM tod914 You could experiment with a plug in the airline wi... Jan 18 2010, 04:46 PM |
3 User(s) are reading this topic (3 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th December 2024 - 03:31 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.