KA sputtering,missfiring, bogging..... =/ ????

[miami-200sx]

hello all., im not new to this site, and i have searched all around and read multiple posts, but i cant seem to find the problem.

the engine is a kade. the ecu was throwing the code 12 *maf. i changed the maf, i changed the plugs and the wires, also changed the fuel filter and ran an injector cleaner.

the car is running much better now. but it still boggs under acceleration. mostly from 2000rpm to 3500rpm itll bogg and sumetimes start jerking like is going to fall apart, and as soon as i let got the throttle, it will stop and go back to normal.

also while accelerating and at idle it will missfire alot, and i can hear the backfiring every 2 or 3 secs.

* what could it be?

-fuel pump?-vaccum leak?-coil?

please help. im clueless to this and is bugging me!!!!

[Valett85]

i was just reading somewhere today that that motor usually developes clogged or bad fuel injectors after a while "dont hold my by it its just something i read" so i'd check out the fuel delivery system.

[miami-200sx]

ok so today, i went playing with my voltometer, and when i checkd the TPS it did not change from idle to 3500..........so the tps is prob going to be the cause of my loss of sleep lolim gona change the tps tomorrow. and will update.

if not the tps then im gona upgrade to a walbro.255 and if not. ill go jump off a bridge.......

[nissantuner91]

Is your timing ok?

[miami-200sx]

timing is ok. a lil advanced but nothin crazy.

i went today to the junk yard and all the s13s had the TPS cut DAMN now i need to solder and heat shrink the damn wires......