Idle issue..., D-jet idle a bit faster than should be-what am i missing? |
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Idle issue..., D-jet idle a bit faster than should be-what am i missing? |
DRPHIL914 |
Mar 10 2016, 08:00 AM
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#1
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Dr. Phil Group: Members Posts: 5,768 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
75 d-jet 2.0 with hotspark module rather than points.
no vac leaks - after looking at the idle A/F and the fact that my adjustment screw on the ECU had no effect on it, I was told the TPS was not set correctly or it would. so I did adjust the TPS and now as I adjust the ecu knob it does change the idle slightly and A/f- prior my idle was lower and it seemed to be more on the rich side as well. - but after making this adjustment, I went back thru and due to the idle being a bit higher( it is now around 1200 warmed up), it had been about 900-950, so I went back thru and rechecked the timing mark is at TDC, and was re-applied by the Porsche mechanic last year so- verified, then timed at 3500rpm at 27 degrees btdc. also the distributor is clean, like new and advance plate is moving properly. my airscrew is all the way in, and the AAR is closed. if I adjust the ecu setting knob to more rich, the idle comes down a bit but then its really too rich and feels like its not a smooth . - am I now looking at the MPS setting possibly not being correct? its the only other item I have not touched, and the A/F info says the MPS is where it should be at WOT and part load. those numbers are really good and my gas milage has been good too. thanks, |
913B |
Mar 11 2016, 01:24 AM
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#2
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Senior Member Group: Members Posts: 847 Joined: 25-April 05 From: South Bay/SoCal Member No.: 3,983 Region Association: None |
Ditto here, I chased that same dam idle issue over a year as well. Dont forget the Cylinder head temp sensor. I read Pbanders trouble shooting guide and thought I needed a spacer for the CHT, installed but condition persisted, eventually figured out it was bad connection where the CHT plugs into that plastic spade housing connector, cut that section out and installed a new spade connector. Starts and idles at 900, then I re-installed the AAR and now on cold start ups it idles at 1200 until the AAR closes and goes back down to 900.
Good luck (IMG:style_emoticons/default/beerchug.gif) |
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