1983 Porsche 944 throttle position switch or DME relay

1983 PORSCHE 944
114,000 MILES • 4 CYL • 2WD • MANUAL
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HARLEYFX
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Car seems to flood out and stall after driving a few miles. It will continue to run if i keep the rpms up but smokes and smells like gas. I have replaced the pressure relief valve and fuel pump along with vacuem lines.
Nov 4, 2010 at 6:51 PM
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RASMATAZ
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  • ASE Certified Mechanic
Hi harleyfx, Welcome to 2carpros and TY for the donation

If its black smoke and smell like gas its running to rich and can be caused by the following below

1.Excessive fuel pressure can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Defective Oxygen Sensors.
3.Leaking injectors and fuel pressure regulator.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
Nov 5, 2010 at 2:49 PM
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HARLEYFX
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  • 2 POSTS
did not satisfy my queery.It run good for 30 min or so then acts it is running rich and wants to stall.have already changed pressure regulator with no change in performance.
Nov 5, 2010 at 9:55 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the fuel pressure with a fuel pressure tester and comeback with the readings
Nov 6, 2010 at 9:06 AM
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