 D-jet guys, never before encountered problem |
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| TheCabinetmaker |
 Oct 26 2011, 07:12 AM
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I drive my car everyday  Group: Members Posts: 8,336 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. |
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| TJB/914 |
Oct 26 2011, 08:28 AM
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Mid-Engn. Group: Members Posts: 4,406 Joined: 24-February 03 From: Plymouth & Petoskey, MI Member No.: 346 Region Association: Upper MidWest 
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D-Jet Guys,
I had the same problem with my Raby #9550 cam, etc upon startup. I adjusted the ECU to get it corrected. Now I can't remember which way I turned the knob. Can someone tell me which way is lean & rich??? clockwise or counter clock?? I forgot?? (IMG:style_emoticons/default/confused24.gif) Tom |
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| sfrenck |
Oct 26 2011, 08:54 AM
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#3
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Member Group: Members Posts: 492 Joined: 28-February 10 From: Wilmington, DE Member No.: 11,411 Region Association: MidAtlantic Region
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QUOTE(Thomas J Bliznik @ Oct 26 2011, 10:28 AM)  D-Jet Guys, I had the same problem with my Raby #9550 cam, etc upon startup. I adjusted the ECU to get it corrected. Now I can't remember which way I turned the knob. Can someone tell me which way is lean & rich??? clockwise or counter clock?? I forgot?? (IMG:style_emoticons/default/confused24.gif) Tom Clockwise richens - but you'll be changing the fuel delivery during idle for both cold and warm engine operation (your warm idle may get worse). Along those lines, if your mechanic set the ECU knob for emissions for warm idle, I wouldn't want to change the setting. Out of curiousity, how does it cold idle if you block the AAR (plug the intake hose to the AAR or temporarily clamp it closed)? Maybe you can just take it out of the equation all together. |
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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 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 |
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