kenc

iTrader: (6)

hi guys, just after putting new ngk 7b plugs in my car which is a 00 sti 4dr, and also a full straight through system with open throat decat down pipe, at 5k revs the car i think is fuel cutting, would the straight through system cause my boost to rise and the ecu to cut fuel????????????????????, i have no boost gauge to read the boost yet. next prob!!! i was told that car would run lumpy with these plugs when cold but car is running like sh*t, even when warm, its mainly in first and secon, and taking off from stop, you dont have to dog it for it to happen but it seems to be breaking down or missing rite up to 3k revs, i dont know if this is plugs or is it fuel cuting this low in r3vs because of exhaust???????? help me please, am supposed to be getting tek3 remap of andy forrest end of month to make use of mods, would this be prob??? anyone exp similar, car was perfect b4 plugs and ex....
cheers

blueyzfr1

Put the plugs back in and see if it still does it.
Only change one thing at a time
R.

TonyBurns

iTrader: (3)

More than likely its your downpipe causing overboost due to the greater air flow (and increased boost). The 7b's are a cooler plug, did you have 6's in before?
I should add that my MY03 JDM has NGK 7's as standard and it doesnt run like a dog when cold!

Tony

Fuzz

Sounds more likely that you have damaged the coils.
Never yet seen a problem with PFR7bs in any model scoob.
What gap did you set them to?
Needs to be 0.7mm


Andy

kenc

iTrader: (6)

thanks for reply, so those plugs have to be set before you put them in. do you know what there set at out of the box, the plugs that came out of her were 6bs and were well used, but still were ok to drive

Fuzz

Every plug should be at least checked before install even if they are pre gapped plugs.
Normally around 0.8mm I find

Andy