Diagnosing an intermittent D-Jet problem..., Hesitation under load at 2800 RPM but only when cold... |
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Diagnosing an intermittent D-Jet problem..., Hesitation under load at 2800 RPM but only when cold... |
MikeInMunich |
Oct 10 2016, 02:46 AM
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#1
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Member Group: Members Posts: 392 Joined: 19-November 13 From: Munich, Germany Member No.: 16,674 Region Association: None |
Hi again from Munich!
Here are the details. But please see update from Feb. 5th below! I have a D-Jetronic intake. Under load and at about 2800 RPM Im experiencing an intermittent hesitation. Yesterday my son and I took the car out for a drive from Munich, towards Innsbruck and back and we ran into a bit of rain coming along the Aachensee (lake), and this hesitation got worse. Then I remembered the only other time I've had this car out with 100% humidity and that it wasn't running well on that day either, so this is apparently a clue. So what can this be? And why does it happen at all, even when it's not raining, albeit not as noticeably? Is there a cure? Experts / senior gurus out there, thank you for your time and sharing your knowledge and experience, in advance! With kind regards, Mike in Munich (IMG:style_emoticons/default/smilie_flagge6.gif) |
MikeInMunich |
Oct 11 2016, 09:28 AM
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#2
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Member Group: Members Posts: 392 Joined: 19-November 13 From: Munich, Germany Member No.: 16,674 Region Association: None |
Checked the CHTS connection...seemed to be OK, BUT, after that, my idle changed upward significantly! I turned it back down with the idle screw. With the AAR shut completely the idle was over 1600 and was previously about 900. So, apparently the CHTS wasn't working and now is?? What do you think about this new symptom?
As for the "hesitation", I can at least confirm that it's not definitely still there. Seems like it MIGHT be better. M.i.M. |
BeatNavy |
Oct 11 2016, 10:56 AM
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#3
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
Checked the CHTS connection...seemed to be OK, BUT, after that, my idle changed upward significantly! I turned it back down with the idle screw. With the AAR shut completely the idle was over 1600 and was previously about 900. So, apparently the CHTS wasn't working and now is?? What do you think about this new symptom? I don't think that had anything to do with the CHT. It sounds like you disconnected a vacuum line in the process. I guess you could say the CHT (and CHT "circuit") has three modes (basically): working, intermittently failing, and failed. When it's failed, or during those times when it is intermittently failing, due to a broken/breaking wire or flaky connection, the engine dies. It super-enrichens to the mixture to the point where the engine floods. If the connection is "restored" quickly enough, the car may not fully quit but "buck," I suppose, during that episode. That's it. As for the "hesitation", I can at least confirm that it's not definitely still there. Seems like it MIGHT be better. Wait...what? (IMG:style_emoticons/default/confused24.gif) I'm guessing CHT may not be your problem... |
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