How Long, ... does your AAR keep the idle up after cold start? |
|
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. |
|
How Long, ... does your AAR keep the idle up after cold start? |
pbanders |
Jan 4 2010, 05:44 PM
Post
#1
|
Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
For those you with D-Jet 1.7 and 2.0 motors, assuming you haven't ripped out your aux air regulator, how long does it keep your idle high after a cold start (left sitting for 3+ hours)? On a cold start with my car, turning the key with no throttle input starts the car, which immediate jumps to 1700 rpm. After about 3 minutes, it drops to idle speed, approx 1000 rpm.
How does your cold start / engine speed sequence go? |
SirAndy |
Jan 4 2010, 06:10 PM
Post
#2
|
Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
For those you with D-Jet 1.7 and 2.0 motors, assuming you haven't ripped out your aux air regulator, how long does it keep your idle high after a cold start (left sitting for 3+ hours)? On a cold start with my car, turning the key with no throttle input starts the car, which immediate jumps to 1700 rpm. After about 3 minutes, it drops to idle speed, approx 1000 rpm. How does your cold start / engine speed sequence go? My '70 1.7L D-Jet was about the same. 2-3 minutes ... (IMG:style_emoticons/default/bye1.gif) Andy |
SLITS |
Jan 4 2010, 06:20 PM
Post
#3
|
"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Never timed it ...
|
tod914 |
Jan 4 2010, 06:24 PM
Post
#4
|
Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Think mine is about 4-5 minutes, 1200-1300 rpm down to 950. My 74 took abit longer despite changeing AARs. Maybe 10 minutes.
|
Cevan |
Jan 4 2010, 06:34 PM
Post
#5
|
Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
The '75 L-Jet was about 2-3 minutes. The '74 D-Jet was closer to 8-10 minutes.
|
shoguneagle |
Jan 4 2010, 06:38 PM
Post
#6
|
shoguneagle Group: Members Posts: 1,180 Joined: 3-January 03 From: CA, OR, AZ (CAZOR); New Mexico Member No.: 84 Region Association: Northern California |
I think you are ok as I get the same on my Jeep, on my Alfa Romeo Spider, on my Vette, on my Chev Pickup. All go along the lines of the other member ranges: Cold start 1,500 then about 2 - 3 minutes later drops to about 1,000 rpm. We are located at 7,000 ft and the temperature geets down to zero or below during the early morning hours.
If it goes to higher rpm and does not come back you have problems. Hi, Sir Andy Steve Hurt |
914_teener |
Jan 4 2010, 09:02 PM
Post
#7
|
914 Guru Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Brad,
My 1.7 goes for about 2-3 minutes 1400 RPM's. Then down to 950 RPM. |
N14 |
Jan 5 2010, 10:45 AM
Post
#8
|
Out There Group: Members Posts: 78 Joined: 31-October 06 From: North Vancouver B.C. Member No.: 7,119 Region Association: None |
My 74 d-jet maybe 8-10 minutes.
|
tracks914 |
Jan 5 2010, 10:53 AM
Post
#9
|
Canadian Member Group: Benefactors Posts: 2,083 Joined: 15-January 03 From: Timmins, Ontario, Canada Member No.: 153 Region Association: None |
On a cold morning, 45-50F it doesn't come off at all on my way to work. (8 minutes)
On a hot day, it still takes about 5 minutes. |
Bleyseng |
Jan 5 2010, 11:12 AM
Post
#10
|
Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Mine start off at 1800 rpms and ends at 1150 after 3-4 minutes...Jake 9550 cam thou..so cold idle is rough for about 1 minute.(too rich) (IMG:style_emoticons/default/dry.gif)
|
pbanders |
Jan 5 2010, 11:19 AM
Post
#11
|
Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Thanks to all. Looks like a cluster of 3-4 minutes and a cluster of 8-10 minutes. I tried adding a 5 ohm ballast resistor to the AAR heater wire - if it had any effect in extending the time, it was minimal. I'll keep playing around with it. I'm going to put my vacuum gauge on the intake side of it and watch it over the first 10 minutes after cold start to see what happens.
|
montoya 73 2.0 |
Jan 5 2010, 02:26 PM
Post
#12
|
Lack of consideration to others, and Selfish! Group: Members Posts: 1,791 Joined: 27-October 04 From: Paso Robles, Ca. Member No.: 3,016 Region Association: Central California |
My 73 2.0 D-Jet owners manual says to not warm up the engine in neutral. To drive off immediately using low engine RPM for the first few miles. Is this something for just the engine break-in or is it forever?
|
tod914 |
Jan 5 2010, 02:57 PM
Post
#13
|
Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Brad of 4 units that I tested after warm up while mounted, they all seem to have slow leaks and pull vaccume. Be curious to see if yours does the same.
|
SirAndy |
Jan 5 2010, 03:00 PM
Post
#14
|
Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
My 73 2.0 D-Jet owners manual says to not warm up the engine in neutral. To drive off immediately using low engine RPM for the first few miles. Is this something for just the engine break-in or is it forever? But that's different. The AAR will still keep the idle up for a few minutes, even if you start to drive right away. The AAR does NOT work off engine heat! As soon as the AAR gets power, it will heat up by itself and close when warm, regardless of the engine temperature. And yes, you should always start driving as soon as possible. Do not let a cold car idle for a longer period of time. (IMG:style_emoticons/default/shades.gif) Andy |
montoya 73 2.0 |
Jan 5 2010, 11:26 PM
Post
#15
|
Lack of consideration to others, and Selfish! Group: Members Posts: 1,791 Joined: 27-October 04 From: Paso Robles, Ca. Member No.: 3,016 Region Association: Central California |
My 73 2.0 D-Jet owners manual says to not warm up the engine in neutral. To drive off immediately using low engine RPM for the first few miles. Is this something for just the engine break-in or is it forever? But that's different. The AAR will still keep the idle up for a few minutes, even if you start to drive right away. The AAR does NOT work off engine heat! As soon as the AAR gets power, it will heat up by itself and close when warm, regardless of the engine temperature. And yes, you should always start driving as soon as possible. Do not let a cold car idle for a longer period of time. (IMG:style_emoticons/default/shades.gif) Andy (IMG:style_emoticons/default/pray.gif) Thank you Ol' wise Yoda! |
Lo-Fi Version | Time is now: 14th May 2024 - 05:31 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |