911 996 3,4 C4 won't start

[Jarzembek]

Hi everyone . I have a problem with my 911. No fires . I do not have any errors. Is the spark and fuel pressure. What time should check yet ? Are damaged shaft position sensor , always generates an error ?

[JFP in PA]

Originally Posted by Jarzembek

Hi everyone . I have a problem with my 911. No fires . I do not have any errors. Is the spark and fuel pressure. What time should check yet ? Are damaged shaft position sensor , always generates an error ?

If you are referring to the crank position sensor, no, they do not always throw codes, but when they go out, you would have no fuel pressure.

[Jarzembek]

I found damaged one teth in my flayingwheel, maby?

[Jarzembek]

He was bent about 2mm

[JFP in PA]

Originally Posted by Jarzembek

I found damaged one teth in my flayingwheel, maby?

That could be an issue as it is adjacent to the "tooth gap" which is a critical measurement point for the CPS. I would also pull the CPS and look at the face of the sensor for any signs of damage, it does not take much for these things to crap out.

[FPB111]

Next question is how did that tooth get bent?

[Jarzembek]

Curvature was probably in the planning surface of the flywheel .

[Jarzembek]

Still nothing. But after few times of traying started a have this:
Factory Fault Code 407 -DME relay/control module faulty (computer monitoring: reset) Signal implausible

[JFP in PA]

Originally Posted by Jarzembek

Still nothing. But after few times of traying started a have this:
Factory Fault Code 407 -DME relay/control module faulty (computer monitoring: reset) Signal implausible

You need to look at the following:

Does the DME have power?

Is the CPS signal reaching the DME?

If the DME has power and the harness checks out that the CPS signal is reaching the DME, you may have a faulty DME.

[Jarzembek]

what should be the minimum fuel pressure ?

[JFP in PA]

Originally Posted by Jarzembek

what should be the minimum fuel pressure ?

Engine off, 3.8 +/- 0.2 bar, or around 55 PSIG

[Jarzembek]

I have 3,2- 3,3 bar and when i crank i have maximum 3,4 -3,5

[JFP in PA]

Originally Posted by Jarzembek

I have 3,2- 3,3 bar and when i crank i have maximum 3,4 -3,5

That should be more than enough pressure.

[Jarzembek]

The engine fired , the reason was the broken EPROM . But now I have a problem with the motor , poorly fires , and engine has a low speed , do not respond to the gas throttle . There are no errors . Probally i have air leaks but i dont have any ideas where?

[ltusler]

I think you should give us some history of the car and what you have been doing to it.