Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: HI2DVY on 26 March 2008, 15:44:45

Title: Engine falters at 4000 rpm
Post by: HI2DVY on 26 March 2008, 15:44:45
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
Title: Re: Engine falters at 4000 rpm
Post by: rickyboy on 26 March 2008, 15:45:52
Crankshaft sensor needs replacing.
Title: Re: Engine falters at 4000 rpm
Post by: HI2DVY on 26 March 2008, 15:53:12
Thanks mate. I'll take a look.
Title: Re: Engine falters at 4000 rpm
Post by: Dazzler on 26 March 2008, 16:07:30
As said, code 19 is a faulty crankshaft sensor :y
4k limit is the engine in limp mode because of the fault code ;)
Title: Re: Engine falters at 4000 rpm
Post by: Marks DTM Calib on 26 March 2008, 16:22:43
Quote
As said, code 19 is a faulty crankshaft sensor :y
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
Title: Re: Engine falters at 4000 rpm
Post by: Dazzler on 26 March 2008, 17:06:07
Quote
Quote
As said, code 19 is a faulty crankshaft sensor :y
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 :-[