D-Jet Issues-getting close, Need a little more specific advice |
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D-Jet Issues-getting close, Need a little more specific advice |
OU8AVW |
Mar 16 2015, 09:17 AM
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#1
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Yacht Rigger Group: Members Posts: 1,803 Joined: 1-October 08 From: Granbury, TX Member No.: 9,601 Region Association: Southwest Region |
So I got my car back from the local Porsche shop and installed a rebuilt MPS from Bowlsby but the car is still not running right. Flat spots and intermittent dead fire misses. She starts right up, idles well and drives ok but when you get on it it has intermittent flat spots and when shes just cruising it misses once and a while. Seems like the advance is not ramping up like it should. Also, the mechanic left a vacuum line off the distributor. The line from the inboard connection on the pot is hooked up but the outside one is off. I understand that one of these is advance and one is retard.
Just need a list of crap to check (IMG:style_emoticons/default/biggrin.gif) |
OU8AVW |
Apr 24 2015, 05:07 AM
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#2
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Yacht Rigger Group: Members Posts: 1,803 Joined: 1-October 08 From: Granbury, TX Member No.: 9,601 Region Association: Southwest Region |
Following Rich's advice above I determined that:
A: the AAR was staying open causing high idle B: the timing was set to 13 deg at 3500rpm causing a flat spot at acceleration. (IMG:style_emoticons/default/dry.gif) I plugged the AAR and set the timing. Car ran pretty good and did not flatten out while accelerating Now I'm worried that the shop set up my MPS with bad timing and a leaky AAR. Now she wants to idle at 1200 rpm. Improvement but not perfection. I'm going to fiddle with the AAR or get another one. Then start looking for a friend with an O2 sensor I can use. |
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