v6 vp backfiring when taking off ?

[sparksy07]

just put extractors on my vp v6 and it has just started back firing when taking off?
but only does it when it gets warm and only some times not all the time ?

[rusty91]

is it on gas? If so id be doin plugs n leads n make sure no vacuum leaks n airbox hasnt blown up

[sparksy07]

no its not on gas and i have checked the box and its ok ?
plugs and leads all just been changed.

[mischa]

Did you put the oxygen sensor back on the new extractors?

[FXST01]

no its not on gas and i have checked the box and its ok ?
plugs and leads all just been changed.

Has it started backfiring since you put on the new plugs and leads? What gap did you use for the plugs?

[sparksy07]

didnt change or cheque the gap ? what should it be??

[sparksy07]

yep. O2 sensor back on.

[Brett_jjj]

Sparkplug gap should be 1.5 mm.

[sparksy07]

Thanks Brett.
will check that.

[Gudgeon Pin]

got a leak at manifold???