I used "M156" knock sensors, cause new "M112/M113" not available around me,

and i hate to use any second hand Elec. items, kinda my weird habit..:D,,

you can simply, not close the hood completely, and let someone to drive the car, and you can diagnose the car easily..!!

No bro., if they're less sensitive, will NOT put them,

as you know; knock sensors are the heart of Engine, can't joke with them, isn't..?!?,

they are better price than "M112/M113" sensors, and i like how bend of the EV1 connectors, more carving for connector plug..:)

you can go with "M112/M113" sensors, no problem with that, but in my case; they're NOT available around me,,

and IMO; they're not deserve the price, compared to "M156" sensors..!!

-;ZAYED;-

did that car show simular issues to mine with the hessitation?

Great..:)

-;ZAYED;-

"Something really strange lately though...

i have had some health issues and spent a week in hospital, the car was not started for over 3 weeks, i expected it would run like a total dog, but it actually ran better than it has in a very long time.

I cant explain that at all."

I believe this, I had my car parked for a week. Didn't get started not once. When I did go start it and drove it I couldn't believe how good and how fast it drove. I didn't disconnect the battery either so wasn't that the ecu reset. And it continues to drive very well..

Yeah im not sure what is going on there. I havent used it in more than a week since that one drive, i think i will have to drive tomorrow so ill see what happens.

must be sugar pill placebo effect :rolf:

Well it wasnt all in my head, drove the car today and it ran like usual, there is no question it was considerably more powerful last time, for just that one off day.

The way it revs up you would think the timing is retarded abit.

how's the weather down under?
did you have rain recently?
rainy weather makes car breath better with fresh air

yeah mate, a fair bit of rain. I can hear it about 500 meters away right now actually.

But having said that, weather was fine both times i have taken the car out.

maybe car gets reset by it self not driven for long time?
or you maybe forgot how it drove last time you drove the car and now it behaves differently with a new sense of feeling from you?

No. It starts rough most of the time after sitting more than 7-8 hours, yet on that one occation it didnt, it started and ran perfectly. Pushing the throttle in park resulted in a very snappy rev up, which usually it not the case, its quite a lot slower, like what happens if you dont have enough advance on the spark timing.

I've put more than 100,000klms on this car in the last 3 years, so i know exactly how it starts and runs.

Starting my E55 cold used to result in a nice big growl, the C43 was the same when i first got it, but cold starts on it now are like there is not enough fuel pumped in at start, fuel rail is up to pressure and holds fine.

MAF is new, 02 sensors are 12 months old, coolant temp sensor is 12 months old, cam and crank sensors are fine. Disconnecting battery over night does not change this either.

The ESL is new, but still have all 3 original keys and key reader, id be suprised if that had anything much to do with it though.

Just to throw out some ideas.

fuel pump relay might be old and not sending enough or consistent voltage. Can try flushing the fuel system as well for the rough start.

Really another long shot but check your ground strap.

Also throwing an idea, have you changed your fuel filter?

you could be onto something there...

yep, been done a few times

have not replaced the fuel pump relay, might look at that. Fuel pump is 12 months old and genuine.

Throttle cable and throttle position sensor are new,

if your car drives slow like grandpa using a walker?
it could be clogged injectors not giving enuff fuel?
have you tried with a bottle of wich brew Motul cleaner poured in your tank when you're low on fuel below 30 litres?
low on fuel gives you a higher cleaning concentrate.

maybe you have a vacuum leak somewhere giving you issues?