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 |
Mar 16 2015, 08:05 PM
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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 |
Remove the advance vacuum line and plug it.
Drive it. Also, remove the distributor cap and rotor. Hook up the advance vacuum line to the little can on the distributor. Remove the DECEL line so the port is open. Take the other end of the advance line and suck on it, see if you can move th advance plates. If yes, when you let off do they SNAP back to no advance??? Rich |
OU8AVW |
Mar 17 2015, 07:55 AM
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#3
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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 |
Remove the advance vacuum line and plug it. Drive it. Also, remove the distributor cap and rotor. Hook up the advance vacuum line to the little can on the distributor. Remove the DECEL line so the port is open. Take the other end of the advance line and suck on it, see if you can move th advance plates. If yes, when you let off do they SNAP back to no advance??? Rich Ok, sucking on the advance moves the plate and it pops back nicely. I'll plug it and drive it. And report back. I cleaned the TPS. It looks pretty iffy. Cleaning it did help the surging about 50% but caused a low idle. (IMG:style_emoticons/default/headbang.gif) |
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