Need some some guys

[steve1040]

Im having a really annoying promblem with my S14. After the car warms it starts to sputter n losing power as if it were going to turn off (in fact sometimes it does) n the rpms bounce up and down. N it jolts back n forth while its sputtering. it does it while driving n while at idle. Some of the time it goes away but most of the time it just keeps doing it. Also it is gettin horrible mpg. Ive replaced the spark plugs, fuel pump, coolant temperature sensor, n fuel filter but nothing changed. I am completely stumped. Any help would be appreciated.

[Ceepo]

check all your couplers/vacuum lines for boost leaks...

[steve1040]

Lol i should have put that im running the stock ka n its a 95. But i did check for vacuum lines for leaks n came up wit nada

[dato]

idle air control valve

[Schassis707]

Clean out the iacv and if not it's the tps, or your timing if off, play around with the ignition timing with the tps unplugged of course. At first if you have problems with the cars idle and u unplug the tps and it stop, there u go that was the problem... My s13 has that problem right now and I just got a different tps sensor in the mail today(thanks traxx07) and will put it on 2moro and hopefully it's fixed

[Schassis707]

So i put the new tps on and it fixed the same problem u had, just post wtb and u will get one soon.

[miklos]

What's a "some some guy"?

[buentellomma]

try cleaning your mafs

[steve1040]

I cleaned out the maf already n also checked the tps n it was good. Im going to checkout the iacv next. Thanks. Oh n that some some guys thing was a typo.

[Schassis707]

I started experiencing the problem again after changing my tps, and it's bc my maf is being moving around bc of the intake, so I got a few questions:
1)stock or aftermarket intake
2) if aftermarket is the maf in a position that it won't be able to move up down or whatever?
3) is your car running rich?
4) does the car sputter in certain rpm range?