GSRwBOOST

fuel setup as follows.. and the problem

history... code 14 and tps sensor code, art sends replacements... done.

injectors and 8-1 fmu disk
fields set to -30% on 1-3000 rpm levels

car runs fine it seems, stronger at 8 and 10 psi levels (cant wait for higher)..

at idle it bobs up and down (rpm gauge), idles for a bit and on occasion gives me anohter code 14.

my thinking is, more fuel than it can compensate for so the car idles down thinking that will do it.. but starts to drop below idle, then bumps it up only to see the same problem again... (due to larger injectors)

idle vacume is at -20

I'm thinking the extra fuel is causing the problem.. cna anyone confirm this?

Strider Turbo

Your screwed, just turn your keys and turbo in on your way out the door. Thanks for playin. HEH

greyzone

What size injectors...what is your fuel pressure at idle?

degradated

RC 370cc injectors, and we really don't know the fuel pressure because it is Teed from the banjo bolt on the fuel filter, and the two pumps fight each other giving a wacky reading.

dbman96

If you're the least bit serious about figuring out what's going wrong, you need to relocate the FP gauge to somewhere it will do some good. If you don't mind blowing a few bucks getting a decent idle reading, do this:

go to hardware store

get hose barb tee to fit your fuel line (AFTER THE BLOODY SECOND PUMP)

get a few extra feet of fuel line

buy 0-100 psi water pressure gauge (like $3)

buy 1/4" FPT to hose barb fitting to attach water pressure gauge to fuel line

attach pressure gauge on line to tee

hose clamp everything

start car, figure out what your damn fuel pressure is

The gauge will give out after a week or so since the seals aren't made to stand up to gas, but it's only like $3-5 down the drain and you can always just take the gauge off when you're not interested in what it's doing. Fringe benefit is you can put the gauge wherever you have enough fuel line to reach - I had mine taped to the windshield so I could get a rough idea of how my FMU was working.

greyzone

Pure and simple, dbman96 knows his ****.


[Modified by greyzone, 7:39 AM 12/18/2001]

VTC_CiViC

Sounds good dbman

chri5

I dont think it is your fuel, code 14 is like the IAT or IACV. With 370s at -30% you should be good at stock fuel pressures. Of course the assumption is that it is stock fuel pressure. if you're hitting higher than that on me

GSRwBOOST

yea... i'm going to put the fuel rail on next couple days and get fuel pressure back to stock settings if it's off.. and see what happens from there..

just wanted to see if my theory is right... too much fuel causing idle problems and the subsequent code 14

SiR Kid

Let me throw a wrench into your thinking here guys....

The Field VTEC controller will only adjust fuel at WOT, not idle.

He's still hitting normal fuel pressures and pulsewidth with those 370's, therefore he's got WAY too much fuel.

GSRwBOOST

if i'm sitting at idle with the stock injectors and fields.. and i turn the fields all the way rich +30% the airfuel reads rich.. if i go -30% the air/fuel goes lean... so i'd say it works at <WOT...??

solution? drop the fuel pressrue with my fuel pressure regualtor? if this is the problem

dbman96

While the ECU IS in closed-loop at idle, the field or AFC will influence the mixture still; the ECU appears to pick a "base" fuel mixture based on the MAP sensor input and then adjusts based on the O2 sensor. I can stall my car out if I zero the VAFC at idle on my 450cc injectors so I know it does something.

chri5

s previously mentioned the VAFC affects idle. I can see the injector pulse change on my AVCr when I adjust it with the VAFC at idle.

SiR Kid

Maybe I am confusing the Field unit with my previously owned Shogun tuner....

I know one of them was WOT only...

Xerxes

The King of ghetto engineering!

Evil DOHC

Okay let me brake this down for u.
First check your fuel pressure with the hose off. Set it to around 40 psi base pressure with the vacum off. Then lean out on fields. If u want send me an e-mail and I will send u some of my base settings for a gsr with those type injectors.
If u dont' set your fuel pressure correctly u will damage the diaphram inside your regulator and flood your motor with fuel. This is the main reason why your car is acting this way. Get the fuel pressure taken care off, then lean it out with the fields.
My e-mail is evildohc@aol.com
EVIL

GSRwBOOST

Evil...

i turned the fpr out a few turns. witht he car on.. and listend to the drop in noise/idle.. then after it was at a lower idle.. i played with the fields so the car idled better.. and now when i rev it goes to 900-1000 goes up a little then back down to idle with little or no more movement... i'll knwo more when i drive to work... but that might do it.. <<<<-------------- crosses fingers