 Idle issue..., D-jet idle a bit faster than should be-what am i missing? |
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| DRPHIL914 |
 Mar 10 2016, 08:00 AM
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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 
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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, |
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Posts in this topic
Philip W. Idle issue... Mar 10 2016, 08:00 AM
scott_in_nh Are you reading the dash tach or a tach/dwell mete... Mar 10 2016, 08:37 AM
Philip W.
Are you reading the dash tach or a tach/dwell met... Mar 10 2016, 10:23 AM lsintampa :popcorn:
I've chased idle issues for over a... Mar 10 2016, 09:44 AM scott_in_nh To me it seems it would be on the air side, not th... Mar 10 2016, 10:32 AM r_towle Adjust the tps like this.
Then set dwell with a me... Mar 10 2016, 10:33 AM Philip W. Yes, rich I had it set exactly like that but the e... Mar 10 2016, 11:10 AM JamesM Possibly weak advance springs in your distributor ... Mar 10 2016, 11:24 AM Wyvern Following this with same issue.
GREAT thought on ... Mar 10 2016, 02:12 PM nordfisch Hi,
it's quite easy to adjust THIS KIND (the n... Mar 10 2016, 02:43 PM Philip W.
Hi,
it's quite easy to adjust THIS KIND (the ... Mar 10 2016, 02:49 PM nordfisch
...
which kind is a new kind? not sure ive seen o... Mar 10 2016, 04:46 PM Jeff Bowlsby The TPS for a 2.0L is calibrated with an ohmmeter ... Mar 10 2016, 03:13 PM GregAmy
...after looking at the idle A/F and the fact tha... Mar 10 2016, 05:15 PM BeatNavy
I thought the knob on the ECU was for mixture, no... Mar 10 2016, 05:26 PM turk22 Phil, since I'm in the middle of AAR issues, a... Mar 10 2016, 05:49 PM r_towle Sadly I think that bowlsby is correct and you need... Mar 10 2016, 08:29 PM 76-914
Sadly I think that bowlsby is correct and you nee... Mar 12 2016, 09:08 AM jack20 I chased the same problem. Don't forget the in... Mar 11 2016, 12:26 AM porsche913b_sp Ditto here, I chased that same dam idle issue over... Mar 11 2016, 01:24 AM jcd914 I have seen several 2.0L plenums that were cracked... Mar 11 2016, 05:19 PM Philip W. I got to do a bit more on this thursday, really se... Mar 12 2016, 12:49 PM  |
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