Engine falters at 4000 rpm

[HI2DVY]

Strange one this...

My 2.5 V6 has been sitting in the driveway for a few weeks with hardly any use. I took it for a spin today and discovered I can't accelarate past 4000 revs - bit of a problem when trying to overtake! When I get to 4000 rpm the engine seems to jerk violently and the EMS light flashes. It's worse if in sport mode.

I thought it may have been a fuel pick up problem as the tank was quite low but Ive ran a paper clip test and get the following results:-

019 - Incorrect RPM Signal

059 - Intake Manifold Valve 1 Voltage Low

I suspect the 059 may be an old reading from when I changed the head gaskets and forgot to connect the rear multiram connector - but maybe not?

Any ideas what may be causing this?

Dave

[rickyboy]

Crankshaft sensor needs replacing.

[HI2DVY]

Thanks mate. I'll take a look.

[Dazzler]

As said, code 19 is a faulty crankshaft sensor
4k limit is the engine in limp mode because of the fault code

[Marks DTM Calib]

As said, code 19 is a faulty crankshaft sensor
4k limit is the engine in limp mode because of the fault code

Thats not limp mode enduced becasue the crank sensor wont initiate any limp mode.....but if the signal is poor then the waveform might start to collapse at higher revs

[Dazzler]

As said, code 19 is a faulty crankshaft sensor
4k limit is the engine in limp mode because of the fault code

Thats not limp mode enduced becasue the crank sensor wont initiate any limp mode.....but if the signal is poor then the waveform might start to collapse at higher revs

I bow to your better knowledge Mark