Cps fail?

[steved0x]

I had the CPS fail on me one time, car shut off as I was driving and would not crank, but if I let it sit 20-30 minutes it would crank. Then it would shut off again 10-15 minutes later. Rinse and repeat.

If your car cranks up and runs rough and then smooths out, that doesn't sound like CPS to me, unless maybe it is doing some very rapid intermittent failure. Usually it just cuts off and then won't start until it cools down a little.

[flouese]

All,

Thanks for the responses. Will check fuel pressure this weekend. See if Advance Auto has a loaner rig. Now to figure out how to do it...
Of course all this will take place after I go to the 20th anniversary shin-dig at Amelia Island.

[911monty]

A FP relay is a common spare carried in older Porsches. They do not always completely fail and can cause intermittent issues such as yours. The problem is you can check fuel pressure and it works fine and can cause you to look elsewhere. If you haven't already I'd replace it with a new one, they're cheap <$20.

[flouese]

Originally Posted by 911monty

A FP relay is a common spare carried in older Porsches. They do not always completely fail and can cause intermittent issues such as yours. The problem is you can check fuel pressure and it works fine and can cause you to look elsewhere. If you haven't already I'd replace it with a new one, they're cheap <$20.

Thanks for the input. I will order the relay today. Will follow up after install to let you know if that fixed the problem.