Porschenstein

I checked the original CPS that I pulled out. Looks correct, makes sense because swapping it didn't fix it. Display at 20 °C: 0.8 - 1.0 k ohms = 0.932, 0.930, 0.928, Seems to drop a bit with every check.

Not exactly bouncing, moves very slightly, opinions? tach.mp4

Thanks, yes it is the correct diagram just wasn't sure if Speed Sensor was the same as CrankPS... Also I forgot to say in the initial post it's a 1999 C2 Coupe, DME 5.2.2

Thanks, I'll check it but it's brand new, connections were cleaned, so I'm thinking maybe wiring or the magnet. Should it show "Ready or Present" even with the car not running? Is this the Crank PS on DME pins 78 & 20?

Still looking for confirmation on a couple of things: Can anyone say for sure that this is the Crank Position Sensor and it should have a "Ready or Present" value even when the car isn't running? Is this definitive information that means we're not getting a signal from the Crank PS? Is this the crash data signal (GR/OR SRS pin 24 to I32 pin 33), I thought it always has a signal but the pulse changes if crash data is present. Would this just throw an AB warning light or could this cause a DME no start since it's not getting the signal. Thanks

Thanks, correct me if my thinking is incorrect on this but I think I can rule out any of the physical issues, meaning: Jump the relay socket: pump runs Tested the relay with cover off: contacts close with voltage (replaced it anyway, new FP relay now) Connect with scan tool and tell the DME to run the pump: the pump runs So I think it has to be a logical reason, meaning the DME isn't happy about something and isn't in a run ready state. With no codes thrown, I'm hoping the PIWIS will give a clue from an actual value on the DME or Immobilizer, I have two that I'm currently concerned about. One is on the Immobilizer I see: Signal From Airbag: Not Present. This one may be because it's a used SRS module, locked to another VIN, dealer says only a new one locked to your VIN will work, but does that shunt the fuel pump? Some posts say they have used one from a donor but it would be good to know for sure if putting a donor SRS module could cause the no start. I will also investigate the GR/OR wire going from SRS(24) to the Immobilizer(33) crash data. Not sure if that's the missing signal but maybe? The other is on the DME: Reference Mark Signal: Not Present (Is this the Crank Position Sensor?) I did replace the Crank position sensor early on, I've made sure I didn't cross the connection with Cam sensor that shares the same mounting bracket. If it is the missing signal, maybe it needs to be shimmed or something, I didn't see anything as far as shims on the old one that came out. I don't really see the Tach needle bounce, but I have pulled spark plugs and watched them spark while the engine is turning over.

Anyone have any advice on finding problems with the PIWIS? I'll post a link to a long thread on rennlist rather than going back through everything here. The short of it is the fuel pump doesn't come on when trying to crank the car. Seems like the ECU isn't turning it on for some reason. I say it that way since wiring, relay and ECU's ability to turn it on all seem fine, have also disconnected the fuel line at the filter to confirm no fuel when cranking. ECU, Immobilizer and key set all confirmed good by ECU Doctors. I rented a PIWIS 3, I'm sure it's a clone but seems to work. I'll attach a few PIWIS results as well. 1999 C2 Coupe, DME 5.2.2 ServiceValuesReport.pdf Sensors that can cause turn over but no start - Rennlist - Porsche Discussion Forums RENNLIST.COM 996 Forum - Sensors that can cause turn over but no start - I'm wondering if someone knows all sensors that must be functional for the stage 2 MPI & Ignition to come on when trying to start a 996. I've swapped the ignition switch electronics and Crank position sensor. I...

It works, Thank you so much.

I am working on rebuilding a salvaged 1999 996 C2 Radio is a CR-210 S/N: W5010462 Thanks, Ron