misfire at idle

[billroy]

hi to you all im new at this and hope you can help me. i have a vectra 2.0 t 100 limited edition its started misfireing at idle but seems to go when driving then noticable when you try to put your foot down someone suggested the coil pack but i would of thought it would do it all the time any help much appreciated.

[cont1204]

So would I but you never know. Have you done the simple things first like put a new set of spark plugs in?

[wcr]

You wont get a definitive solution just on that description mate.

Many, many things can cause a misfire, or what feels like a misfire. Is it a misfire or is it lack of fuel? You probably don't know yet which is why it needs to have a full diagnostic ran.

Misfires can often be diagnosed wrongly without having manufacturer specific diagnostics plugged in. From your brief description it could be -

Plugs
Coil pack
ECM
Wiring
Sensors (one or more of many)
Fuel pump
Fuel blockage

To replace all the above you'll be over £1000, search locally for someone with Tech2/vaux com/opcom and spend £30 - £70 getting the fault pinpointed.