gt3 non start

[topmech0]

hi all

have 2004 996gt3 that friend just rebuilt engine. after initial start up all seemed fine at idle for about 10 mins. tried to rev slightly and holding back like air leak or fuel starvation. then it cut out. no mechanical noises etc. now just cranks with no efort to fire,not even splutter. on pst2 it comes up with three faults

P0335 rpm input circuit

p0344 phase sensor 1

p0349 phase sensor 2

so presumed crank sensor. swapped it for used one and put his in another car. his worked ok in other car.

this gt3 still just cranks.looks like there was no spark.

any ideas? we had to stop looking last night as it was getting late.

[Loren]

P0335 Engine Speed Sensor Signal – Open Circuit

Possible fault cause

- Corrosion in the connector

- Open circuit or short circuit in the wiring harness

- Rpm/crankshaft position sensor faulty.

- DME control module faulty

P0344 Camshaft position sensor 1 - open circuit

Possible fault cause

- Camshaft rotor (phase sensor wheel) damaged

P0349 Camshaft position sensor 2 - open circuit

Possible fault cause

- Camshaft rotor (phase sensor wheel) damaged

I would focus on the P0335 - check the wiring from the sensor and also check the DME cable at the DME to see that they are tight and undamaged.

[topmech0]

thanks loren. i found the problem. it was cam timing. the tools used were for early gt3 9661 with 9661/2 plates for inlet cams but as its 04 it should have been set with the gold 9661/3 inlet plates. reset it and all fine now. i was suprised it was that as the cam sensors threw faults up and would have thought even if timing out the sensors would still pick up signal from cams when turning. anyway all seems good now

[Loren]

:thumbup: