Intermittent lack of power

[Chappers200]

Erm so ive searched and everything and cant fin any clear and concise info on what it could be.

Basically, ever since i bought my car ive had a problem thats getting steadily worse. When i Start the car after its been off for a while it will missfire until ive turned the car off and on 3 or 4 times and then it will be completely fine. I alsi have a lumpy idle.

Now, what can this be? ive changed the coil pack and sparks to no avail. But have recently been told my ecu might be fudged.

Any help appreciated.

[jm-darcy]

Does the engine management light come on at all?

[shell-vt]

safe mode possably

[Cam]

Wont be ECU, alot of people assume its always the ECU when its not. Sounds like a air/feul matter to me so map sensor lambda sensor etc..

[stevo67]

Don`t rule out the voltage regulator on the alternator slowly dying either mate.

[Chappers200]

got a flashing eml while its missfiring (idle gets stupidly lumpy, lack of power) and then constant the rest of the time (never goes off)

[jm-darcy]

I do not think that stopping and starting the car will be resetting the ECU (I think power needs to be disconnected from it for hours for it to fully reset), so I am not sure that the starting/stopping could be connected to sorting out a fault with the ECU. The fact that there are no lights on the dash would also suggest the ECU is okay.

Hmmm....tricky..!

[jm-darcy]

Sorry...posted too early...so EML does flash on and off during misfires..but doesn't stay on to allow codes to be read?

[Chappers200]

well yeh i heard that ecu is most likely a constant problem not intermittent but drastically losing my patience with the thing.

clutching at straws. Spose i could just start replacing bit by bit sensor by sensor and hope it works.