B18 CYA

hey all, got a lil problem with my setup on my 97 gsr... if i try and floor it until 5000 rpms it sputters. I can go half throttle or more until 5000 rpms. right after 5000 rpms it pulls like crazy but anywhere below 4800-5000 rpms it sputters when i floor it. heres a video .... check it out need help please!!
http://www.mod-mart.com/car/MOV01435.MPG

Turbo E

possibly too much fuel or plugs gapped too wide. *still waiting for vid to DL*

EDIT: wow that was brutal. prolly not a gapping problem. any FMU?

hehehe...indiglo gauges.

STHPERFORMANCE

I'd check the plugs, make sure they are gapped correctly. man that car was bucking like a raging bull...

Jockobo

i get that when my turbo starts to separate from the manifold thus causing slower spool and a overly rich condition before boost.

SL0WEGG

check the plugs. man that was a really bad bogg. did u check your map? maybe its running too fat. do u have an wideband to see where its at? maybe lean it out a lil. i was thinkin to myself man it cant be that bad till i saw the vid. that must be horrible driving that thing around.

Alstare

Heh..

If my car was doing that as I was driving the last thing I'd be doing is putting the pedal to the floor and riding it out..lol

But on a serious note, I'd sugest basically to try the same things already mentioned, and maybe check the basic tune-up items like cap and rotr, wires, etc...

Turboteggy

Just my opinion, so take it for what it's worth.

If the plugs were fubarred, it would get worse as the revs rise. More boost, faster firing = more stress on the plugs.

I would take it back to the tuner and check the maps. Could have low RPM map issues. Do you have a wide-band in the car? If you can, borrow one or whatever.

Also, try putting a fuel pressure guage with a long hose attatched to it. Have a passenger hold the guage while you accelerate, and see what happens.

You need 2 things for a motor to run properly - spark and fuel.

B18 CYA

well at idle i get a constant 14.6-14.8 air fuel ratio... i guess ill try leaning it out a little. but why does it work fine rite after 5000 rpms? it pulls like nuts ....only way i can race is if i start from a roll at any gear at or after 5000 rpms lol. btw, it doesnt bog like that at normal driving, just when i floor it....

Turboteggy

definitely sounds like a mapping issue.

what's your management?

B18 CYA

using stock injectors rite now at 7 psi ...obd1 ecu using uberdata ....

Johnyquest

Stock injectors @ 7psi? That takes some *****.

It's most definatley a fuel map problem. I'm guessing it's your low map, and your car probably switches to the high map (vtec) @ around 5k.

Post the map and let some of us check it out.

Matt

edit: Meanwhile, GET SOME INJECTORS!

B18 CYA

heres the map ...

http://www.mod-mart.com/car/gsr.bin

B18 CYA

anyone?

warrick

I'm going to go ahead and say that ***you don't even have a boost map set up***.

you're probably pig rich below 5k, and anything in boost is lean as hell.

is your vtec kicking in? are you using an external controller? because it's not enabled in the rom you posted.

list everything done to the car, and everything you changed in the rom.

B18 CYA

front mount intercooler ...
Precision SC34
Tial 38mm WG
TurboXS RFL BOV
stock injectors (til i install my 780cc's)
Inline Pro Manifold
PLX Wideband
Greddy Turbo Timer


thats as far as ic an remember off the top of my head... i cahnged my ignition retard, o2 heater disable, and eld. how would i go about setting up a boost map?

m R g S r

Wow, riding in that car must make you look like the guy in turboteggy's avatar. LOL

m R g S r

Woah, your bosting with stock injectors and no fmu? Aren't your injectors at like 500540528909% duty cycle?

B18 CYA

im not using an fmu or a missing link...

Chris F

Hey, I think something must have been wrong with your speedo... it said you were doing 110 MPH on the street.

Just kidding. Anyhow what's your setup? That thing pulls pretty hard for sure. Dyno yet?

-Chris

MiKeAhOwSkI

well your uberdata map has no boost section setup at all... I dont even know what happens when there's nothing setup. I would suggest not driving it until you get your new injectors installed.



edit: also I hope I was hearing the wastegate in the video, and not a whole lotta detonation.


Modified by MiKeAhOwSkI at 5:56 AM 7/9/2004

warrick

don't disconnect the charge piping, the turbine will fry itself if it doesn't have the backpressure in the charge piping.

1) stay out of boost, PLEASE.
2) get some 450cc or bigger injectors
3) come back when you have these and we can talk about making a boost map AND then you can tune it with your wideband.

PLEASE DO NOT BOOST UNTIL YOU HAVE NEW INJECTORS.

MiKeAhOwSkI

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by warric_k &raquo;</TD></TR><TR><TD CLASS="quote">don't disconnect the charge piping, the turbine will fry itself if it doesn't have the backpressure in the charge piping.</TD></TR></TABLE>

good call I didn't do it very long... just to go to emissions; my bad.

B18 CYA

Engine Internals:
JE 9:1 81mm Pistons
Eagle H-Beam Rods
STR Block Guard

Turbo Setup:
-Precision SC34
-Turbo XS Type-H RFL BOV
-Tial 38mm wastegate 1.0 BAR Spring
-Inline Pro T3 4bolt turbo manifold (stainless steel)
- Precision Intercooler 31.5 X 8.0 X 3.5 600HP
-Greddy Turbo Timer
-3" downpipe with 3" exhaust from front to back... just a resonator no cat...

anyway, its not detonating. my air fuel ratio reads between 11.7- 13.0 on my wideband when i give her....

B18 CYA

ordering sum injectors tomorrow morning...

warrick

are you using crome or uberdata?