R33 Rb25 Spluttering

[wayde]

hey

at revs over about 6000 it starts to splutter and loses power and even changing gears at low sometimes it backfires but its more of a miss than a back fire

any ideas?

cheers

wayde

[shaunzo101]

spark plugs...get bcpr6es spark plugs and tell us if the 6000 rpm splutter goes away.

[wayde]

spark plugs...get bcpr6es spark plugs and tell us if the 6000 rpm splutter goes away.

i already replaced the spark plugs and the coil packs are good the wiring harness for them isnt that good the clips are all broken but they still go onto each one

[shaunzo101]

How can you be sure the coil packs are good what makes you say that?

The standard coils are very common to fail. Try taking each one out, wrapping pvc electrical tape around them top to bottom (mainly around the top square part) and give that a go. Shouldn't miss a beat. If you got the right spark plugs in too and you didn't drop them before putting them in.

Edited February 15, 2009 by shaunzo101

[Binofski]

+1 to the wrapping, coil packs are notorious for this....

also with the spark plugs make sure they are gapped to 0.8

[wayde]

i fixed it buy wrapping the coil packs and changing the wiring harness which all the plugs were pritty much destroyed by the heat. now revs to 7 and a half no problems.

only thing is sometimes when im not even giving it much it back fires i dont know if its getting to much fuel or anything

[Impact]

haha yeh i was missfiring, spluttering like a bitch on heat, changed plugs to some iridiums, no more spluttering, but now i get a few backfires, i have splitfire coilpacks.