Missfire... help reqd

[HeathGTST]

Fellas,

I got a miss fire in my beast, I changed the plugs this morning and put brand new ones in of the same type, I think they are BCPR7ES 11 and regapped them to the reccomended .8mm and all was fine and i did about 45klms driving and on the way home i filled it up with synergy 8000 from mobil which is 98octane fuel and now she has developed a missfire at around 5,500-6000rpm and the clears up again... Could I have just got a dodgey batch of fuel??

The other thing i noticed is that my HKS mushroom filter had come lose a bit and i think maybe it was sucking in un filtered air.... would that make a difference?

If i gapped down my plugs to say .7mm from .8mm would it make a difference?

thanks

[Zahos]

Hey Heath,

do a search for misfire and hesitation.

This has been covered plenty, so you will find plenty of info.

cheers

Zahos

[cameron]

Sounds like plugs or coils could be both.

Tape up your coilpacks with duct tape from the top to the bottom on the ruber boot.

Might be the plug try BCPR6ES ?

[BBQ]

Fellas,

I got a miss fire in my beast, I changed the plugs this morning and put brand new ones in of the same type, I think they are BCPR7ES 11 and regapped them to the reccomended .8mm and all was fine and i did about 45klms driving and on the way home i filled it up with synergy 8000 from mobil which is 98octane fuel and now she has developed a missfire at around 5,500-6000rpm and the clears up again... Could I have just got a dodgey batch of fuel??

The other thing i noticed is that my HKS mushroom filter had come lose a bit and i think maybe it was sucking in un filtered air.... would that make a difference?

If i gapped down my plugs to say .7mm from .8mm would it make a difference?

thanks

Give your plugs a re-gap to .7 and see what happens, if it works at that plug level you could have week coils. Also change the filter foam, if the filter is comming apart that is not a good thing.

[Ed G]

these are not iridium plugs right? what is the diff in performance? are they worth a try?

[TurkeySlapper]

I had to close my gap to .6 to stop misfiring, now goes like a champ.

[Duncan]

I had to close my gap to .6 to stop misfiring, now goes like a champ.

then you probably need stronger coils. A small gap might stop a missfire but it will produce less power.