TPS Adjustment, did it by the book, but.... |
|
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. |
|
TPS Adjustment, did it by the book, but.... |
Bruce Allert |
Apr 21 2005, 02:52 PM
Post
#1
|
Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
It's an easy adjustment and I've done it many times but with the last few (even with a new TPS) it seems that when the car isfirst started & running cold, I can just touch the throttle & move it ever so slightly & that's when the car wants to quit running. If I go past that point it will pick up & run.
When I adjust the TPS by the Bird article, it says to move one more hash mark after the ohm meter jumps to zero. Sometimes the needle jumps when I'm between hash marks. So, do you move to the next hash mark making only a 1/2 a move or do you move past that closest mark to the next one making it a 1 1/2 hash mark movement? Anyone ever experiment with their movements (on the TPS) (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) .......b |
Bruce Allert |
Apr 21 2005, 04:42 PM
Post
#2
|
Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
OK, so, just got back from a long drive and discovered after it warms it idles at 1500. Usually, this is saying a vacuum leak (but there ain't none)! So, I step on the gas maybe an 1/8th and the idle goes down to where it's supposed to be (900/1000). This is telling me the TPS is miss adjusted, eh?
Hopefully this is what it is cuz it's, basically, new. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) ....b |
TheCabinetmaker |
Apr 21 2005, 05:10 PM
Post
#3
|
||
I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
No. this points me towards the AAR not closing. Elimnate the AAR from the equation by pulling and pluging the hoses, or pinch the hose with pliers when at high idle and see if the idle goes back down. A vacuum leak will be a vacuum leak at all engine temps. TPS should not affect warm or cold idle speeds. Do an ohms test hot and cold on the CHT. I know you have already checked the valves, dwell, and timing. Opps, ya gots petronics. No dwell. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) Curt |
||
Bruce Allert |
Apr 21 2005, 05:27 PM
Post
#4
|
Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
Curt, the CHT & the TPS is new. Why would giving it slight throttle cause the idle to go down? You'd think it would go up, right? This isn't making sense (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
I've checked the AAR many times & it's closed... tight. If I turn the car off then restart it, it idles at 900-1000. Go out & drive it & the idle goes up. (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) All components numbers match (CHT, ECU, MPS, Dizzy). ....b |
TheCabinetmaker |
Apr 21 2005, 05:45 PM
Post
#5
|
I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Do you have a little slack in the accelerator cable? Did you ohm test the new CHT? I've thrown brand new CHT's in the trash. The quality of CHT's doesn't seem to be as good as they used to be.
|
Bruce Allert |
Apr 21 2005, 06:26 PM
Post
#6
|
Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
Yup, got slack. I'll test the CHT. Could be a crappy one like you said. Besides, they're cheap (thank God)! (IMG:http://www.914world.com/bbs2/html/emoticons/beer.gif)
...........b |
Lo-Fi Version | Time is now: 23rd May 2024 - 10:30 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 ... |