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Car will turn over and run for a few seconds and stall

Tiny
PAULR
  • MEMBER
  • 1999 PORSCHE 911
  • 85 MILES
Had the heads rebuilt by a top shop when they were installed now the car will turn over and run for a few seconds and die. The heads were rebuilt 100 percent new gaskets. The car was down about a month. When u try and start it it runs rough for a few seconds and dies. It doesn't run long enough to build compression. It seems like a security problem except it did run for about 2 minutes once. I am a transmission and motor builder bit this is my first Porsche. It is a 99 911 carrera. Any ideas
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Wednesday, February 22nd, 2012 AT 12:27 AM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure the valve timing is correct? If okay check fuel pressure
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Wednesday, February 22nd, 2012 AT 12:31 AM
Tiny
PAULR
  • MEMBER
  • 4 POSTS
I'm as sure as I can be. I timed it off info from online. Any suggestions
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Wednesday, February 22nd, 2012 AT 3:19 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you put piston no.1 on its compression stroke/TDC and align the cam and crank sprockets as indicated in the repair manual? Also did you check the fuel pressure with a gauge to confirm the pressure if its within specs?
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Wednesday, February 22nd, 2012 AT 11:51 AM
Tiny
PAULR
  • MEMBER
  • 4 POSTS
It's settings cam sensor a code out of range or performance.
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Wednesday, February 22nd, 2012 AT 4:11 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If its popping a camshaft sensor double check the wiring and the computer before you replace it-
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Wednesday, February 22nd, 2012 AT 8:33 PM
Tiny
PAULR
  • MEMBER
  • 4 POSTS
Yeah that's what I did. It took awhile to figure out which one was cam sensor a. Thank u
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Thursday, February 23rd, 2012 AT 3:08 AM

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