sr20 question idle/ reving issue

[S14Chask]

ok well i have been dealing with isssues with the motor seince ive bought it mostly with the idle but i seafoamed the whole car and i also took out my FMIC pipeing and cleaned all the s*** in there out and now its idleing pretty good it still drops kinda when i go to brake but i think thats due to my IACV setting becuase i took that screw out and have been playing with the setting to find out where it idles right at.. anyways!!!

now im haveing another problem its done this in the past but idk what to do to fix it but im haveing some hesatation.. like ill just kinda cruze in 2nd gear at liek 2000rpm and it kinda sputters and bucks and s*** and when i give it gas it bucks more then finally the rmps will just rise super fast and my car will come to life.. and then sometimes you will be cruzeing and then the same thing will happen and when you go to give it gas even if you step on it.. nothing happens then finally blastoff!!!!!!!! lol

when im at the track drifting its fine becuase im on the throttle alot of the time but when i daily drive its soo bad its soo f***ing annoying to daily drive just becuase of that..

idk if it has to do how i setup my oil catch can

or if its a boost leak?? how do i search for a boost leak??

i have no idea if its eaither of those i mean i have checked everything on the car like 4141513 times and then i bought it to z-feaver and they took a pry bar and pryed the fuel rail down and it stoped haveing a surging idle but that was last year now its being stupid again idk what it is

its werid like when i sit in my friends car and we have the exact same setup and i press in the gas at an 800 rpm idle it rises up soo fast with no hesatation

then when i do it in my car the rpms sligly drop down then go up if i press and release the pedal and then if i slam the pedal it takes like 2-3 seconds for it to rev up.. and it kinda sounds like it sputtering and s*** its super werid then when i press in the brake pedal it drops the idle superrrrrrrrrr low and wants to die out..

[S14Chask]

help

[xX RB Xx]

kinda sounds like a TPS( throttle position sensor)

[LOLChevyPower]

My thaughts exactly. I bet its the TPS.

[Steady_One_S13]

Double check all hoses. Come up with a leak tester like this one:zerothread?id=113785Vac should be around 18-20 inHg.

Check the fuel pressure. A bad fpr and/or fuel pump could causeit to sputter and wanna make it die. My .02 cents. Hope that helps.

[duffman1278]

Definitely sounds like a vacuum or boost leak.

What is your vacuum at?

Pressurize the system with that DIY Boost Leak Tester kit and listen for any leaks, make sure your in a quiet place, and also open up the throttle to listen for any possible leaks in the intake.

[S14Chask]

yeah idk i just bought a brand new fuel pump and put it in... its super weird like if i press in the throttle i hold it in for like 3-4 seconds and then it will finally rev up

and when im driveing the throttle keeps dieing out like i will be driving... and then my car gets quiet and then it starts to buck alot it makes me look like im a horriable driver...

tps is supposed to be set at .45 volts correct?? what is the proper way to set the tps ive tried to do this many times i dont understand it at all for a point the tps was not even being used the little arm that attatched to the part on the throttle was just below it...

[Steady_One_S13]

TPS factory reading is 0.45 volts when the throttle is closed. Make sure engine is off. Check with a multimeter. Probe the middle pin with the red lead, then the black lead to ground. The reading should be around 0.45 Volts.If needed, loosen (but do not remove) the bolts to the TPS, and adjust til youget .45 volts.Hope that helps.

[S14Chask]

ill give that a try!!

my vacume is useally at 20 sometimes its a little bit lower

i wish i could get you guys video i tried driveing home last night and it was just horriable its really not responsive at all.. if i stay above 3000 rpms and drive fast then it drives good but from a dead stop and i romp the gas it just takes like 4 seconds to finaly realized that i did that...

or if im just cruseing 2nd 3erd at like 2000 2500 it wants to keep bucking and kinda dieing out then when it dies out kinda and i press the gas more to make it go it bucks again its werid..