bad engine missfire

[mattfas]

hi more problems when i accelerate hard in my car it missfires badly and the engine management light flashes on and off then goes off all together. When driving normall the car seems fine its just when the turbo kicks in it starts to missfire bad what could this problem be? thanks

 

[mattfas]

advice urgently needed

also i tried unplugging the maf sensor andtaking it for a drive it is still the same plugged in or not plugged in does this rule out the maf sensor could it be a coil pack that is on its way out this is urgent as i use my car everyday to travel to work its a hundred mile round trip please help

 

[lee_woollett]

I had a similar thing happen to mine recently, turned out a plug hard worked loose or hadn't been tightened and was blowing the coilpack off the plug when on boost, this was ok at low boost. Try checking the plugs first or checking to see if all the coilpacks are on the plugs properly. If everything is tight and the coilpacks are pushed down hard then i guess one of them is dead or dying.

 

[mattfas]

hi lee thanks for advice i just done the checks you said all the plugs are tight and coil packs are correctly fit so one of them must be on its way out but how can you tell wich one it is and how much do they cost

 

[mattfas]

just had the spark plugs out and they all look ok no funny coloured ones they all look the same in good condition how can you tell if its a coil pack thats on its way out i only put the plugs in 3000miles ago

 

[ScoobyJawa]

Covered only last week - search is your friend.

Its a coilpack failing. Because its not failed you can't tell which it is. Replace them all anyway, once 1 goes the others seem to follow. About 80-90 quid for all four from Euro Car Parts or GSF...............

 

[smiff]

Yeah definitely a coil pack on its way out had exactly the same problem i managed to get a log done and locate the bad one all coilpacks were only 7months old replaced the faulty one and alls fine now