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) |
r_towle |
Apr 23 2015, 11:53 AM
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#2
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Custom Member Group: Members Posts: 24,577 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
high idle is vacuum leak AND/OR timing.
So, remove everything from the plenum and cap it off with rubber caps available at the local hardware store plumbing isle.... Leave JUST the MPS connected to the plenum. Its all you need. Dont be lazy and leave the AAR on there.... Remove all of them.. Does it still do it? Add one system (vacuum line) back at a time. First I would quickly check timing...it may simple be that.. 3500 rpms, tie off the accel on the throttl body with a piece of string, steady at 3500 Then set the timing... vacuum line off the distributor...Dwell already set correctly. Again, dont cheat... Rich |
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