View Single Post
5l32v4c 5l32v4c is offline
1985 Porsche 928s
 
Join Date: Dec 2012
Posts: 315
Garage
This is a real shot in the dark. I had a hard starting issue myself not so long ago and it turned out to be a loose connection (in the engine bay) to the temperature sensor. If the computer can't work out the temperature, it can't configure the engine properly to start. Could it be that the temperature guage connection is where the issue is? Again, this is a wild-ass-guess, but it's something to consider.

While I think of it, another signal the computer needs to start the engine comes from the flywheel sensor which also feeds the tach. I can see why bad connections at the pod could, theoretically, cause starting problems.

Check to see if your fuel pump is spinning when you try to start the car. The computer will not send voltage to the fuel pump unless it has input from various sensors. If you have someone crank the car while you have your hand on the fuel pump (under the tank) you should be able to feel if it's working. If the fuel pump does not spin, also check your fuel pump relay as these can randomly go bad and have you chasing your tail. On my '85, the fuel pump relay is the same as the horn relay, so you can swap it out for troubleshooting. Trying to troubleshoot with a relay that is starting ot fail can drive you nuts as it might work intermittantly.

Last edited by 5l32v4c; 06-08-2016 at 02:26 PM..
Old 06-08-2016, 02:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)