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 |
Jun 10 2015, 12:36 PM
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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 |
A quick update as I have had home projects and summer taking all my time.
I replaced the AAR with a known good unit. Now the car starts easily and warms up with no help from the throttle. Car ran pretty good. I was able to adjust the idle to 1k. Happy me. Now on hard decel the idle drops into the weeks. I hear the 2056 like a little higher idle... I have now installed a tested good decel valve. This helped the idle drop but only until the engine is warm. I'm thinking it's rich at idle causing it to tank when the RPMs drop. A quick touch of the accelerator keeps it going. Car accelerates great but still has a flat spot at near full throttle. I'm thinking it goes lean at full throttle. If I'm easy on the gas, RPMs climb with power and smoothness. My assumption is the MPS was adjusted with vacuume leaks present and the guy who did it f-ed it up. My plan is to adjust valves, change the oil (500 mile service) and the hook up the LM2 to set the MPS. I found a good thread on the Samba that I'm adding to my study list. Samba D-Jet thread |
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