Missfiring Problem

[Nathan_G1]

Hey hey

Havnt come accross this problem before and im having a little trouble trying to figure it out.

Basically, holding the accelerator peddle at any rev point, whether it be at 2,000rpm or 4,500rpm im hearing a miss through the exhaust and i cant figure it out.

Coilpacks are spitfires.....they seem fine, however i took the spark plugs out checked them and they seem alright as well, but i think they could still be the problem, they arent igniting right perhaps. Injectors also seem fine.

What other things should i check for, ive just replaced the fuel filter, and on monday il get new spark plugs. Please let me know, its friggin weird and doing my head in.

Cheers Nathan

[Murry33]

Type of exhaust system you have?

How old are your spark plugs anyways, their platinum ones yeah?

Edited March 3, 2007 by NeesaanGTS

[Cubes]

Swap out the ignitor to rule that out. Its a series1?

[Nathan_G1]

series 2, and exhaust type makes no difference. problems only just arose, last time i drove it the car was fine............

[DREW32]

Hey hey

Havnt come accross this problem before and im having a little trouble trying to figure it out.

Basically, holding the accelerator peddle at any rev point, whether it be at 2,000rpm or 4,500rpm im hearing a miss through the exhaust and i cant figure it out.

Coilpacks are spitfires.....they seem fine, however i took the spark plugs out checked them and they seem alright as well, but i think they could still be the problem, they arent igniting right perhaps. Injectors also seem fine.

What other things should i check for, ive just replaced the fuel filter, and on monday il get new spark plugs. Please let me know, its friggin weird and doing my head in.

Cheers Nathan

Hey well yeah i did all that ,s/f ,plugs,clean AFM ,Clean throttle body checked everything 4 times over and over $1000's later ended up putting my old iridiums back in resetting my ECU and bingo off she went heaps more power than ever before unreal now i have clean uniterupted boost YAhoo

[Nathan_G1]

havnt been boosting or anything, its track only........cars been sitting in the shed for 3 odd weeks since i last drove it.

last time i tried to start it my battery was flat and i primed it tried to start and nothing, so i charged it.....next day (after leaving the battery on charge) i started it and there ya go, missfire at idle and at any given rev-point.

dont think its an ecu problem, have a HKS Fcon Vpro, but might look into re-setting it somehow, just worried about losing tune

[teazn_r33]

im thinking that this is your widebody trax car ???

[r33_racer]

have you checked fuel pressure?

Perhaps the fuel filter had been blocking flow and now youve changed it, its increased enough to be slightly too rich causing a miss.

[Nathan_G1]

nah cant be fuel filter......was doing it before, and still is after,

im gonna replace spark plugs 2moro and try again......hopefully that works

yeh teazn....this is the widebody track car