Is 200 Misfire

[schumi7]

can anybody please advise me I have an 04 is 200 started to misfire and engine light started to flash mechanic friend plugged snap on computer into my car and the fault said misfire on cylinders 1356 was advised to change coil packs and plugs have since fitted 6x coil packs and 6x ngk lazer iridium plugs cleared faults started car still mis firing re plugged computer in and no faults present so basically I neee guidance on the best way to go don't want to get rid of the car absolutely love her PLEASE PLEASE help

[Dewfallsuk]

Very strange, you have no Engine Management light or flashing Traction Control symbol. But still have a misfire? The EM system monitors all parameters and should register the fault even if mechanical as the engine would expel un-burnt fuel.

It would be strange but not impossible for all the coil packs to fail at once, whilst a certain fault code points to a potential problem area it does not always mean the specific item is at fault. I might look at the crankshaft & camshaft sensors as these do the job of an old fashion distributor, if it is giving false data to the ECU the engine may misfire? But again this would be picked up by the EM system.

Is the misfire right across the rev range?

Do you have the original fault code as that may help.

[BillNick]

I had a misfire problem when I first got my 200. The management light came on and i had a sever misfire and of course loss of power. Fault code was "Misfire Cyl 3". Gave it to a Toyota Independant Garage who replaced a faulty injector of all things! But cured it and has been fine since. Something to check thats all.

[ChrisIS200SportTTE]

I also had an injector go giving up a mis fire code...

^good advice :)