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Missfire... help reqd

HeathGTST

By HeathGTST,
in Engines & Forced Induction

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HeathGTST Community Regular

HeathGTST

Posted
Posted

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

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Posted
Posted
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.

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