sr20det help

[242sr20]

hi dunno if this is the rite place to post this, new here but just installed a new fmic an full 3" exhaust otherwise from that it is stock. did have a manual boost controller but was reading 15+ psi.. hooked the stock back up an is still reading 15+ was every time the boost goes above 13 it sputters dunno wat the problem is hoping someone can help.. checked the wastegate c if it was sticking but it moves freely i belive it sputters because not enough fuel but duno why the boost is above stock level

[mouse2651]

you could be hitting fuel cut for some reason but i dont know. my freinds that had srs boosted 15 no problem. maybe it could be that your injectors are not running to low duty cycle and is sputtering out or maybe you need a new fuel pump

[ShaunakaRichard]

Upgrade to a walbro 255 fuel pump to stop the sputtering. Most likely the stock fuel pump can't keep up with the demand, thats how it was with mine. And make sure you have your wastegate connected in the correct spot. Could have the wrong hose hooked to it.

[242sr20]

thanks i'll have to check it out..yea i would think it would hold 15 psi easy have to check m fuel pump and wondering why its hitting 15 with stock boost idk lol

[242sr20]

long as the wastegate is hook to a vacuum line its ok or no..

[johnnyballs180]

no, you're gonna want to hook it up to a boost/pressure source.

what brand fmic did you get? if you motor's pretty stock like you were saying, then you probably had a bunch of plastic pipes instead of aluminum, right?

i'm pretty sure the sr20 wastegate picked up it's signal from the hotpipe, the pipe going from the turbo to the intercooler, from a barb/nipple that sits on the hotpipe. if you replace the plastic piping (like with a greddy fmic, for example), you need to find another signal source.

closest to the turbo is generally best; rule of thumb is to make sure you route the line no longer than three feet from the wastegate.

on your throttle body, there's two nipples above the throttle plate and i think only one below; use the top left one for your wastegate. top right is your fuel pressure regulator (don't T into it for the wastegate. for boost gauge it's okay), and bottom left is that stupid charcoal emission thing. hook the wastegate to the throttle body unless you have a place to tap into a little bit closer to the turbo.

if you can move you wastegate actuator rod by hand with a little bit of "mp-ph" then it's probably fine.i'm pretty sure you have a boost/air leak. use a new hose, good clamps (not the crappy one that the car comes with), and check all your other clamps too. if the hose has a crack, it's going to delay the wastegate.

my car would feel like it was "cutting out" when i floored it. after installing some things, i bumped the boost to 1 bar (a little more than 14psi), but i wasn't getting enough fuel. i got a sard 265lph fuel pump, nismo adjustable fuel pressure regulator, and a fuel pressure gauge.

no more sputtering or cutting out. if you keep adding mods to the motor, you're probably going to be needing a lot more fuel soon. plan out what you want to do, and get the supporting mods out of the way early.

g/l

[242sr20]

thanks alot yea i'm planing on jus upgraded fuel pump n regulator n thats it just wanted ta figure out this problem i'll have ta check it out 2maro n let ya know thanks..p.s got hks fmic

[242sr20]

i checked it out the left nipple on the throttle body is fpr the right one goes to a black canister on the right of the radiator also do you mean to run the hose directly from that an t my fpr from another source

[johnnyballs180]

my bad my bad

i was all messed up. right now i'm at work on lunch and about to head out, so i'll take a quick gander to see how mine's set up.

okay, so, two on top of the TB and one below. cap the one below off; it's for the charcoal canister, unless you WANT to use it.

i think the top left is the smaller nippe, for the FPR and boost gauge

top right, bigger nipple, wastegate/BOV.

sorry about the confusion.

*another EDIT



okay, it's a little tough to see, but this is the factory setup. okay, so, FPR on the top left, top right DOES go to the canister, leave that one alone, and bottom left, fudge it and cap it off. tap into the top right nipple, unless your hks kit comes with a barb somewhere.

i feel bad.. i should have just shut the hell up, huh? haha

i was tired of effing with all the lines after a while, and i wanted to put my w/g source as close to the turbo as possible. i went to the hardware store and went to the air tools section and looked at their air accessories. i found a barb, (i forget how many milimeters.. but there were only a few options, and i went for bigger than small. as long as your boost line can fit on it snuggly, it's okay) and i also found a nut with the same thread. the aluminum hotpipe is.. well, aluminum, and not very thick. i didn't want to tap it and find out there wasn't enough "meat" on it.oh, and i bought a tap. lol

i got home, examined exactly where i wanted to put the fitting, and it was 1/4 ways up the pipe coming from the turbo. i marked it, used a nice stepbit to drill it out (obviously you want to be careful and go slow, as to not screw up and drill too big). when it was just a tad small in diameter than my barb, i got the tap and threaded it. you gotta be REAL straight, and take your time, do it right. 'cause if you mess it up, you probably just caused yourself a lot more hassle.tap went in with a little resistance; good. i threaded it in, out, in, out, in and out, lightly, until i was satisfied. i put some super high strength, heat resistant epoxy on the barb's threads, right before i threaded it into the pipe. why not? then on the inside of the pipe, i snuck the nut in there and tightened everything snug. not too tight, but snug.don't ask how i got the nut in there. it was a religious experience. months later and i couldn't take that barb out if i wanted to.

i hope i haven't caused you more problems than you started with
Modified by johnnyballs180 at 3:34 AM 12/13/2008

[242sr20]

i just got it straight, running 9 psi now. just ordered my fuel pump n fpr thanks for the help