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> Running problems with a 2.0, Starts Fine, Runs fine... until warm...
73Phoenix20
post Sep 5 2007, 08:53 AM
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1973 2.0, original engine, completely rebuilt to stock specs about 10K back. Original D Jetronic still in place... new Cylinder Head Temp Sensor installed about 500 miles back. Cold Start valve disconnected... everything else original to the car.

Professional Porsche Mechanic has completely gone thru a major service and full tuneup less than 500 miles back. Fuel system was completely checked from the tank thru the injectors and is fine...

Car starts perfectly from cold, and runs fine for the first 10 to 15 minutes of driving, (which is about what it takes to come up to full operating temps)...

Then it will start intermittently cutting out and missing and often will not rev over 3,000 rpm...

If brought to idle, it will either drop very low, or completely stall. If it stalls, it is very hard to restart, and will only do so with the accelerator fully depressed...

BUT, it does not exhibit this behavior all of the time... occasionally, it will run fine for as much as 150 miles!!!???!!!???

So, in a nutshell, it apears to be an electrical issue that is affected by the heat/vibration of the engine during operation... All ideas to help pinpoint the trouble spot will be greatly appreciated!

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Posts in this topic
73Phoenix20   Running problems with a 2.0   Sep 5 2007, 08:53 AM
So.Cal.914   Just a thought off the top of my head. Have you ch...   Sep 5 2007, 08:58 AM
BahnBrenner914   I was having problems with my 2.0 this summer and ...   Sep 5 2007, 08:59 AM
Ferg   Points. Ferg :)   Sep 5 2007, 09:02 AM
computers4kids   1973 2.0, original engine, completely rebuilt to ...   Sep 5 2007, 09:16 AM
73Phoenix20   That is a Great Tip on how to check the CHT Sensor...   Sep 5 2007, 12:21 PM
Tom   When I got my 76 2.0, it was running rough and wou...   Sep 5 2007, 06:54 PM
Cap'n Krusty   From the symptoms, I would be inclined to check th...   Sep 5 2007, 07:12 PM
orthobiz   occasionally, it will run fine for as much as 150...   Sep 5 2007, 07:34 PM
73Phoenix20   He, He! Well, maybe if the car was still in I...   Sep 6 2007, 08:44 AM
BK911   I had the exact problem with my '72 1.7. Turn...   Sep 6 2007, 03:58 PM
Cap'n Krusty   I had the exact problem with my '72 1.7. Tur...   Sep 6 2007, 06:55 PM
73Phoenix20   Sticking advance weights in the dizzy... that is o...   Sep 6 2007, 04:26 PM
computers4kids   Sticking advance weights in the dizzy... that is ...   Sep 6 2007, 05:57 PM
73Phoenix20   Actually, the 037 MPS was used on the 1.7's AN...   Sep 6 2007, 08:46 PM
stateofidleness   *noob warning* pardon the ignorance what's a d...   Sep 6 2007, 11:20 PM
Rand   *noob warning* pardon the ignorance what's a ...   Sep 6 2007, 11:28 PM
markb   Dizzy=Distributor Oops, Rand beat me to it.   Sep 6 2007, 11:30 PM
73Phoenix20   Well, the MPS checked out well within the 10% marg...   Sep 7 2007, 08:27 AM
orthobiz   Lyle, OK. You live in Michiana, winter in FLA,...   Sep 8 2007, 03:42 AM
73Phoenix20   He, He! Keeps me out of the bars and strip jo...   Sep 8 2007, 08:03 AM
gothspeed   Actually, the 037 MPS was used on the 1.7's A...   Mar 27 2009, 12:24 PM


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