Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> D-jet guys, never before encountered problem
TheCabinetmaker
post Oct 26 2011, 07:12 AM
Post #1


I drive my car everyday
*****

Group: Members
Posts: 8,300
Joined: 8-May 03
From: Tulsa, Ok.
Member No.: 666



Just reinstalled my new engine before musr12. Its a 2056 with Raby 9550 cam and djet. I reinstalled the original FI system complete. Components were bench tested before being reinstalled. Car runs beyond my expections.

Heres the only problem I have really have. Upon cold start (not cold-cold start) it idles very low and rough. A few minutes of throttle held to about 1400 rpms, and the aar kicks in and everything is normal from there. Or, if I start it and pull it out of the garage to the drive, everything is normal. Aar is working properly. Head temp sensor is the correct one and ohms are within specs both hot and cold. Ts-1 also shows 310 ohms at 60 degrees. Cold start valve is not hooked up. I have considered a leaky injector, but is seems that would cause problems only when there is adquate fuel pressure, not after setting all night. Ambient temp seems to make no difference.

Opinions please.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
vsg914   D-jet guys   Oct 26 2011, 07:12 AM
rmital   D-Jetronic Idle Stability (from Brad's site) ...   Oct 26 2011, 07:29 AM
vsg914   Thanks Ray, but that isn't the symptom . This ...   Oct 26 2011, 07:34 AM
rmital   Thanks Ray, but that isn't the symptom . This...   Oct 26 2011, 07:36 AM
vsg914   No prob, Ray. Cold-cold start refers to temps unde...   Oct 26 2011, 07:42 AM
tradisrad   you say when the AAR valve kicks in; do you mean w...   Oct 26 2011, 08:00 AM
914_teener   you say when the AAR valve kicks in; do you mean ...   Oct 26 2011, 08:10 AM
vsg914   you say when the AAR valve kicks in; do you mean...   Oct 26 2011, 08:31 AM
vsg914   AAR works as designed. It opens fully cold and clo...   Oct 26 2011, 08:05 AM
Thomas J Bliznik   D-Jet Guys, I had the same problem with my Raby #...   Oct 26 2011, 08:28 AM
sfrenck   D-Jet Guys, I had the same problem with my Raby ...   Oct 26 2011, 08:54 AM
vsg914   D-Jet Guys, I had the same problem with my Raby...   Oct 26 2011, 09:16 AM
r_towle   most likely too rich at idle. Turn down the knob o...   Oct 26 2011, 10:07 AM
vsg914   Rich, running rich is my thought too. Yes an o2 se...   Oct 26 2011, 10:19 AM
r_towle   MPS needs to be set under load...even with an O2 s...   Oct 26 2011, 10:31 AM
Tom_T   Not sure of the cause nor cure Curt, but you'l...   Oct 28 2011, 09:13 PM
PancakePorsche   My stock engine does the exact same thing. My AAR ...   Oct 29 2011, 02:27 AM
Bleyseng   Its too rich at startup due to the 9550 cam. 1100 ...   Oct 29 2011, 04:07 PM


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 20th May 2024 - 12:46 PM