 d-jet a.a.r. question, 8/18/ AAR open vs closed - effect on setting timing-advance |
|
|
|
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. |
|
|
| DRPHIL914 |
 Aug 10 2011, 08:50 PM
Post
#1
|
|
Dr. Phil  Group: Members Posts: 5,769 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States 
 |
I e tested 4 now and after 10 min none of them close completely or at all. Either way could it be because of a bad connection? Not hot enough? I know atleast one, the newest one was tested as good and is very clean. I know they can go bad inside but I do not think they all are.
But after 10 min of car at idle its still pulling air thru, suggestions please. Phil |
   |
 
|
  |
Replies
| DRPHIL914 |
Aug 18 2011, 06:13 AM
Post
#2
|
|
Dr. Phil Group: Members Posts: 5,769 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
|
I had a thought on this, wondering if this makes sense.
If when i last set the timing the aar was partially open, would this not have caused the distributor to be placed different to compensate for the effect of the AAR, so now if i close off the AAR it almost kills it, and even if the idle screw is out its not there, and so i was thinking that maybe timing might not be where it should be, if i advance the distributor slightly this should bring that idle up a little with the AAR plugged(as if it were closed- when hot)- like it should be. right now after running it 20 min last night idle was at 1100- 1250 while hunting and is running great down the road, and i could live with that - but i know its not right- with the a.a.r. half open it seems this is the best i can do - unless i can get a spare MPS to test(043). PW |
|
|
|
| scott_in_nh |
Aug 18 2011, 06:24 AM
Post
#3
|
|
Senior Member Group: Members Posts: 808 Joined: 10-December 10 From: Hampton, NH Member No.: 12,471 Region Association: North East States |
QUOTE(Philip W. @ Aug 18 2011, 08:13 AM)  I had a thought on this, wondering if this makes sense. If when i last set the timing the aar was partially open, would this not have caused the distributor to be placed different to compensate for the effect of the AAR, so now if i close off the AAR it almost kills it, and even if the idle screw is out its not there, and so i was thinking that maybe timing might not be where it should be, if i advance the distributor slightly this should bring that idle up a little with the AAR plugged(as if it were closed- when hot)- like it should be. right now after running it 20 min last night idle was at 1100- 1250 while hunting and is running great down the road, and i could live with that - but i know its not right- with the a.a.r. half open it seems this is the best i can do - unless i can get a spare MPS to test(043). PW Hi Phil, The timing is a mechanical setting indepedent of the issues we have here, but do check it. So it is still surging indicating a lean condition? Does adjusting the idle mixture on the ECU have any effect (even if it isn't the desired one)? No part throttle surging down the road? Considering that most all failures, even vacuum leaks, default to rich condition and because I know you already replaced FI points and most everything else, I think we are still looking at a MPS setting that your engine is not happy with. |
|
|
|
| DRPHIL914 |
Aug 18 2011, 07:08 AM
Post
#4
|
|
Dr. Phil Group: Members Posts: 5,769 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
|
QUOTE(scott_in_nh @ Aug 18 2011, 08:24 AM) QUOTE(Philip W. @ Aug 18 2011, 08:13 AM) I had a thought on this, wondering if this makes sense. If when i last set the timing the aar was partially open, would this not have caused the distributor to be placed different to compensate for the effect of the AAR, so now if i close off the AAR it almost kills it, and even if the idle screw is out its not there, and so i was thinking that maybe timing might not be where it should be, if i advance the distributor slightly this should bring that idle up a little with the AAR plugged(as if it were closed- when hot)- like it should be. right now after running it 20 min last night idle was at 1100- 1250 while hunting and is running great down the road, and i could live with that - but i know its not right- with the a.a.r. half open it seems this is the best i can do - unless i can get a spare MPS to test(043). PW Hi Phil, The timing is a mechanical setting indepedent of the issues we have here, but do check it. So it is still surging indicating a lean condition? Does adjusting the idle mixture on the ECU have any effect (even if it isn't the desired one)? No part throttle surging down the road? Considering that most all failures, even vacuum leaks, default to rich condition and because I know you already replaced FI points and most everything else, I think we are still looking at a MPS setting that your engine is not happy with. Scott, i was playing around with that last night, - right now the ECU idle adjustment is set only one click clockwise, it is best there, - if i go 2 clicks more rich(clockwise) it gets worse. - so either the mps is way off or the ECU is off(my interpretation- do you think? by the way you have played with these- someone has some unmolested 049 MPS for sale on this board. i believe that is set for 1.7, can those be recalibrated for a 2.0 ? i have not been able to find a reasonable 043 MPS(75-2.0) Phil |
|
|
|
| scott_in_nh |
Aug 18 2011, 08:34 AM
Post
#5
|
|
Senior Member Group: Members Posts: 808 Joined: 10-December 10 From: Hampton, NH Member No.: 12,471 Region Association: North East States |
QUOTE(Philip W. @ Aug 18 2011, 09:08 AM) Scott, i was playing around with that last night, - right now the ECU idle adjustment is set only one click clockwise, it is best there, - if i go 2 clicks more rich(clockwise) it gets worse. - so either the mps is way off or the ECU is off(my interpretation- do you think? by the way you have played with these- someone has some unmolested 049 MPS for sale on this board. i believe that is set for 1.7, can those be recalibrated for a 2.0 ? i have not been able to find a reasonable 043 MPS(75-2.0) Phil Hey Phil, this is curious as that would indicate a rich condition, but you are saying it surges at idle still? Yes that MPS can be recalibrated. |
|
|
|
Posts in this topic
Philip W. d-jet a.a.r. question Aug 10 2011, 08:50 PM
ConeDodger Yes, heat. I assume from the 12 volt source coming... Aug 10 2011, 08:55 PM Valy is that the l-jet or the d-jet aar?
I know the l-j... Aug 10 2011, 09:07 PM ConeDodger Here is a link to Brad Anders DJet site. It outlin... Aug 10 2011, 09:09 PM Tom The AAR for D-jet needs two things to work on the ... Aug 10 2011, 09:39 PM McMark The AAR uses a bimetallic strip to rotate a step-c... Aug 10 2011, 10:45 PM cary As long as we're on the subject. I've had ... Aug 11 2011, 07:39 AM r_towle They get pretty warm, and the heat from the case a... Aug 11 2011, 07:42 AM
Philip W.
They get pretty warm, and the heat from the case ... Aug 11 2011, 08:21 AM Tom The AAR typically draws about 1 to 1.5 amps. They... Aug 11 2011, 08:33 AM underthetire
The AAR typically draws about 1 to 1.5 amps. The... Aug 11 2011, 09:08 AM euro911 I just refurbished a couple of them recently. They... Aug 11 2011, 08:35 PM Philip W.
I just refurbished a couple of them recently. The... Aug 13 2011, 03:05 PM swl The AAR is on the small FI harness - connected to ... Aug 13 2011, 04:20 PM Philip W.
The AAR is on the small FI harness - connected to... Aug 13 2011, 05:35 PM Tom Voltage is only at the AAR when the fuel pump is r... Aug 13 2011, 06:17 PM swl You can check it with an ohm meter with power off.... Aug 13 2011, 07:33 PM euro911 I tested the electrical function using a VOM to de... Aug 14 2011, 12:00 PM Philip W. OK. so ran the car for 10 minutes- yes we are on t... Aug 17 2011, 10:59 AM ConeDodger
OK. so ran the car for 10 minutes- yes we are on ... Aug 17 2011, 11:18 AM Tom Take the AAR hose that goes to the air cleaner off... Aug 17 2011, 11:36 AM scott_in_nh
Take the AAR hose that goes to the air cleaner of... Aug 17 2011, 11:43 AM Philip W.
Take the AAR hose that goes to the air cleaner o... Aug 17 2011, 02:12 PM scott_in_nh
good question- i got the current MPS in a parts b... Aug 17 2011, 02:23 PM Philip W.
good question- i got the current MPS in a parts ... Aug 17 2011, 07:43 PM Philip W.
Scott, i was playing around with that last nigh... Aug 20 2011, 03:08 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th June 2024 - 10:26 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.