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[chrisde82]

Hi Guys,

About two weeks ago my Omega 2.6 V6 automatic broke down on me and refused to start again, it would turn over but wouldn't start. After reading all your helpful advice on this forum My dad and I decided the culprit was the crank case sensor. So we replaced it and it has been running now for over a week, as before I would be lucky if it would run for 5 minutes without cutting out.

For some reason now, the spanner light comes on and goes off whenever it feels like it, which it wasn't doing before. Also, when you give it any amount of reasonable acceleration normally to about the 3000-3500rpm range the car seems to hesitate before it shifts and the emissions light flashes for a few seconds then either goes out or stays on static for a few days and will then go off again. 

I discovered the pedal test works with this car so I tried that and it returned the following fault codes:

44?
0204 Cylinder 4 injector circuit high
0300 Random/Multiple cylinder misfire
0304 Cylinder 4 misfire

Apart from this hesitation when accelerating the engine runs lovely, doesn't sound rough, shifts nicely and runs fine as long as I accelerate it very gently and get it to shift before it hits that 3000-3500rpm range.

I am guessing that the hesitation in acceleration is perhaps cylinder 4 misfiring but I don't understand why it has only started doing this since we replaced the sensor. The car has done just over 65k now and the spark plugs were changed less than 5000 miles ago.

Any advice would be appreciated,

Chris.

[RobG]

Check the security of elec. connector & cabling on #4 injector

[amba]

Try swopping # 4 spark plug with any other and see if it still gives code for missfire on # 4 ,that way you can eliminate the plug.

 

[RobG]

Try swopping # 4 spark plug with any other and see if it still gives code for missfire on # 4 ,that way you can eliminate the plug.

Reckon it`s a misfire because of the injector

[chrisde82]

Thanks for the advice guys, I will try your suggestions although it will have to wait until the weekend because as I am mechanically handicapped it will be something my dad will have to help me with. Hopefully I wont do any further damage to it if I go easy as most of my driving is a motorway commute the only time it really causes concern is when accelerating to merge with the motorway.

Do you reckon all the failed engine starts could have something to do with it? when the crank case sensor was playing up I lost count of how many times I tried starting it with no success.

Chris.

[amba]

Unless driving is absolutley essential, using car with a known miss fire is not ideal as unburnt fuel is going through the cats which will cuase secondary issues longterm