High pitched whine for about 45 seconds on cold start. Is it starter motor or air pump?

SOURCE: no power with fuel pump

firtt make sure the pump is not clogged up , then if u remove the relay and put a piece of wire across 2 off the terminals to make it run constant to see if pump ump is working , or u could wire the pump up to test

SOURCE: 2005 911 battery good. just get whining sound

replace the starter drive gear this gear locks in one direction and rotates the flywheel once engaged.

SOURCE: Vehicle starts cold but runs only for about 45

SOUND LIKE PROBLEM IS IN THE FUEL SYSTEM AND TIMING OFF.CHANGE FUEL FILTER HAVE FUEL PRESSURE CHECK.IT SHOULD RANGE FROM 34 - 40 PSI AND 53 - 59 PSI.SHOULD BE NO LOWER.IF FUEL PRESSURE GOOD.HAVE TIMING CHECKED.MAKE SURE PLUGS + WIRES GOOD ALSO CAP AND ROTOR.HAVE INJECTORS CLEANED.ALL THIS COULD CAUSE THE PROBLEM YOU HAVING.

Delage guy

• 167 Answers
• Posted on Apr 18, 2010

SOURCE: Sometimes it turns over and starts right up and

Sounds like a fault in the ignition switch, or ( if the car is auto) the lock out on the shifter.
First try wiggling the shifter . Else.
Providing that the ignition lights are coming on.
Wait for the fault to appear then hot wire the starter .
Take a wire from the small terminal on the starter to a positive power feed.
If the car starts, check starter relays, fuses, connections ( under footwell on the right side RHD cars) , make sure the connections are good on the starter. If all these things OK, then the actual ignition switch is most likely faulty.

SOURCE: PORSCHE 944 Starting issue:

Your car has a clutch switch if it's a standard and a park neutral switch if it's a automatic. The automatic it's in the console with a rod connected to the shifter, Knock the shifter to the side too hard, ( jump in the car and push the shifter sideways) and the rod can pop out. With the cover off just pop it back in. On the standard shift the switch is on the clutch pedal and you can break the wire or the plug or the switch it's self with your big feet. The carpet can bulg up under the pedal not letting you pust it down all the way. It in doubt about either switch there's just the two wires cross them and it'll start no matter ( just be careful as the reson for the switch is to keep you out of a wreak) Lets say your still out to passture and the switch is good Turn to start and the test light lights at both sides of the switch the wire at the starter ( the one small wire) comes hot in the startt position and you add power at this wire and theirs still no reaction, with this wire hot ( jumper wire , someone holding the key to start) rap on the starter with a hammer, I didn't say nail it) still no good and the big wire from the battery is hot ( battery cable going to the starter is clean and good, then the starter is bad. Have the parts store test it before you buy the new one as if it's good you missed somewher in the story I just told. 10 volts or more at the starter with the key heald at start and it'll start if it's going to/