Help!..car Chokes On High Rpm

[miki_R33]

after doing some mods(intercooler with piping, dump pipe, air intake, safc II, AVCR) to my car i encountered this problem.....

when the car hits approx 4500 rpms it just starts to choke, loses power...higher the boost more it chokes more power it loses....

first thoughts were that the fuel pump is not pumping enough fuel so that was changed( WALBRO 550hp )spark plugs changed as well, still problem persists........

after that coil packs were checked and tested and are all good.....

anyone experienced anything similar to this please HELP!!!!

dont know what to try next!!!

[Fly_With_Sky]

how much boost are you running? If its anything higher than 10psi then put it back down to 10psi and see if it still 'chokes'

sounds like its the rich and retard strategy of the nissan ecu's. there are heaps of threads about it, do a search...

[miki_R33]

even on standard boost, 5psi car still chokes. not as much as on 10psi or over but it still chokes.....

hope to solve this problem soon!!!!

[ferni]

Gap your plugs to 0.65-0.7mm if you haven't already. and use BKR6E.

[Dush]

spit fire coil packs..

[miki_R33]

Gap your plugs to 0.65-0.7mm if you haven't already. and use BKR6E.

that was done as well, didnt help.....

spit fire coil packs..

yeah, thats what i need, spit fire coil packs....

after few hours of testing again today i think problem was identified....

faulty ignition amplifier.....when it was replaced i got much better results straight away....after that coil packs were tested again one by one...this time they didnt test as good when car was running on high rpms....2 needed to be changed, 4 not in very good condition but they will do for now.......

car is running good now but i dont know for how long so i definatelly need a new set of coil packs and i think spit fire is what i wanna go for....

does anyone know a good place in perth where i could get set of those????

cheers