More problems

KilnRed;2032 wrote: There isn't anything more challenging in doing an intake refresh than there is doing a timing belt job. If you've done the timing belt then you're more than qualified to do tackle this one yourself as well.

Are there special tools required to do this job?

KilnRed;2037 wrote: Yes, it's the same for standard 928s. The Hall sensor would be unaffected by a worn starter ring. You are correct.

So the diagnostic that the tech mentioned about hard starting with missing teeth is wrong? What else could be causing the hard start? Why does it take 3 or more cranks before it finally starts?

rluvsporsche;2059 wrote: So the diagnostic that the tech mentioned about hard starting with missing teeth is wrong? What else could be causing the hard start? Why does it take 3 or more cranks before it finally starts?

Yes he is wrong because he dose not know that this system is different then others.

1.-Dose it make a loud grind noise when it doesn't start or dose it crank
normal?

If it cranks normal and dose not start, then either timing or fuel mixture is out.

2.-Did this problem occur after any repairs or did it get worse over time.

Information is the most important thing to properly diagnose your car.

3.-Also what is the mileage.

rluvsporsche;2059 wrote: So the diagnostic that the tech mentioned about hard starting with missing teeth is wrong? What else could be causing the hard start? Why does it take 3 or more cranks before it finally starts?

As Brad pointed out, the air/fuel mixture can cause hard starting. It may not be entirely responsible for your hard starting, but it is definitely contributing since you have known intake leaks. The hard starting issues will probably be resolved once you correct the intake leak(s). No special tools are required for doing the intake refresh.

The intake has many rubber components which given the amount of work to R&R should be all replaced when doing the refresh project. Dwayne has, as are all his write ups, an excellent pictoral explanation of the intake work in his garage website.

There are only a few diag. tools that can be used on the 928. They connect through the diag port with a cable which differs between the '89 model year. Porsche made their own tool referred to as the Hammer because of its shape, John Speake has an interpetation known as the spanner and Theo/Paul have their version which is the most up to date providing the most information and usage on many Porsche models. I have Theos diag. system and used on many 928s.........not only does it activate specific sensors it analyses the engine management systems with engine running.

The flywheel that the starter engages is part of the ring gear which triggers the Crank Position Sensor.

The Hall Sensor previously mentioned is triggered by the exhaust cam of the 1-4 bank of cylinders.