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Old 04-11-2001, 06:00 PM   #1
HOK
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Join Date: Oct 1999
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1999 RSTI
WRB

Post Help! I need help with turbo 99

Hi folks...

I have a EJ22T on MY99 SOHC and a JC sports Custom Turbo. It uses a T28-T3 hybrid. I have a TCII and a S-AFC, Walbro fuel pump, and 440 cc RC Injectors.

I have a boost gauge, EGT and oil pressure (not connected yet). The EGT is connected to the header up pipe to the turbo.

I have done a complete ECU reset and My S-AFC settings are all correct and I have leaned it out 35-40% accross the board for both hi and lo throttle. My lo throttle is set to 0% and hhi is 50%. For the first five minutes after the ECU reset I have a nice pull from 3000rpm to 5000 rpm and I get EGTs at throttle at about 1200 F

But then after a while the CE light comes on and I can't rev past 4300 (I beleive it is in limp mode, since it bouces on 4300 like the rev limiter). And when a do another ECU reset it does the exact same thing The MAF is fine I have changed a new one too and reset the ECU but this still happens. It goes into Limp mode... I'm going to the dealer to scan the error, but whatever they tell me I think you guys know. (probably knock or fuel problems... I think) but even if they tell me, how do i correct the problem. I can't lean it out any further since I tried -50% and still no difference.

I have a rough idle... goes up and down from 900 rpm to 600 and sounds close to dying. sometimes it does die... I have tried the deceleration feature on the S-AFC but it still has a rough idle.

Also anyone know how iridium plugs are rated for cold or hot... does it even matter?

Anyone know whats going on or can help... thanks in advance....
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Old 04-11-2001, 06:08 PM   #2
Pipercub
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Post

Are you venting the BOV to the atmosphere or the intake tract?

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Old 04-11-2001, 06:14 PM   #3
GTBGUY
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'98 QS Legacy L (auto)

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FEI (For Everyone's Info) It's vented back into the intake track.
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Old 04-11-2001, 06:18 PM   #4
Sean McElderry
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Post

Instead of leaning it out, richen it up. Try it and tell us how it went.

Sean
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Old 04-11-2001, 06:28 PM   #5
wac
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Champagne Gold Opal

Post

I highly recommend an A/F gauge as well - you don't get the complete picture with just an EGT, except during steady-state conditions.

Or if you can read fast enough (I can't), watch the O2 sensor voltages on the S-AFC (blue wire mod), and find out what it reads just before, during, and after the engine stumbles. You want to see something like 0.80V or higher.

-WaC
Wayne
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Old 04-11-2001, 06:57 PM   #6
GTBGUY
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Sean - the reason of going with the AFC is to reduce fuel (b/c of 440cc injectors), so why would you want to richen? 440CC injectors are 57% larger than the OEM RS'
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Old 04-11-2001, 07:19 PM   #7
HOK
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Yeah i've tried to richen.. but it back fires and I think that is not really the problem... I think that the ECU and TC and AFC are arguing over settings. I think that since the ECU and the TCII "learn" over time there may be a possibility that if i drive over time it will come to a compromised setting for all three. TCII is ignition and S-AFC is fuel and ECU is being "tricked" by both. I think this is the culprit, it may be getting sensor readings that may be too different because of the 50% lean...

??????????? Guesses - guesses???? thanks for all the help keep em coming...

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Old 04-11-2001, 07:35 PM   #8
wac
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The RC injectors might be 57% higher capacity. (440-280)/280 = 1.57.

But going the other way, RS injectors are 36% lower capacity than the RC's. (440-280)/440 = 0.36.

I would start at -36% instead, and go richer from this point on...

-WaC
Wayne

Edit: richer.

[This message has been edited by wac (edited April 11, 2001).]
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Old 04-12-2001, 10:39 AM   #9
HOK
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at -36% my EGT is at 1200... and when i go to -45 it goes to 1300 i thought lower EGTs mean rich... I was driving for like 15 minutes yesterday before i got the CE light... i'm so mad... I was in 3rd at 3500 rpm... urrrr (what kind of EGT's should i be targeting?)

Thanks!
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Old 04-12-2001, 11:02 AM   #10
blaster88
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1300 is good - up to 1400 is okay under boost
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Old 04-12-2001, 11:30 AM   #11
Pipercub
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But remember the EGT guage needs to be about 1 - 1.5 inches from port #3 for the 1300 ~ 1450 target to mean anything.
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Old 04-12-2001, 03:25 PM   #12
DaveK
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I thought if you have a TCII you don't need the S-AFC. I thought the TCII did tend to richen up the fuel (on stock injectors anyway).
Also, the idling problem seems like a blown MAF...except that it kicks in after running fine for 5 minutes.
Good luck.
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Old 04-12-2001, 05:27 PM   #13
GTBGUY
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'98 QS Legacy L (auto)

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HOK is using the 440CC injectors, the TC2 will work w/ the stock injectors, but since the 440CC's are 57% larger, the TC2 cannot compensate for that much of a change.
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Old 04-12-2001, 06:49 PM   #14
Joe Hogan
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Sorry to hear of your difficulties ... this is a great arguement for a aftermarket ECU upgrade though ... no offense

I agree with the assesment that the stock ECU is confused. Too many pararmeters have been changed for the stock ECU logic to compensate or in fact make any sense of what the engine is doing.

Joe Hogan
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Old 04-12-2001, 07:19 PM   #15
HOK
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WRB

Post

UPDATE UPDATE....!!!!!

Went to Dealership... It was a speedo error from wiring the TCII... JC SPORTS was a great help... They said they will send up a new unit since they think it is faulty...
They have been a great help for my problems...

Things work good now... but still hesitating at around 4300 but no CE light I think the TCII should fix the little hesitations... I'll keep on tweaking.

THANKS FOR ALL YOUR HELP!...

HOK
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Old 04-14-2001, 05:17 PM   #16
Andre Vandenberg
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What are you doing for fuel pressure control?

If it is still stock FPR Change it, THEN start playing fith fuel settings.
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Old 04-15-2001, 09:20 PM   #17
HOK
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yes... stock...

its actually is doing very nicely... I'm getting boost itch.... but i stiall have to find a way to either adjust my wastegate or get a boost controller... how much boost are you running Andre? I'm just at 5 and still i'm pretty fast....
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Old 04-15-2001, 09:45 PM   #18
Andre Vandenberg
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Watch out for the boost bug...... it cost PLENTY to clean up after it

I am running 0.8 bar day in day out, after ECU & tranny upgrade I hope to run 1.2 bar day in day out.

The stock FPR sucks to say the least.... MAJOR restriction inside of it. Dump it and get an SX or something similar for insurance.
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Old 04-15-2001, 10:00 PM   #19
GTBGUY
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'98 QS Legacy L (auto)

Post

Andre Vandenberg - just out of curiousity, are you using the stock injectors for fuel? Hence using a RRFPR and Hi-flow fuel pump?
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Old 04-16-2001, 07:23 AM   #20
Andre Vandenberg
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Stock MY 98 injectors.
Here is where I'm coming from: I don't care if you 1000cc injectors with 350 lbs of fuel pressure, if you have a restriction, (wich in the stock FPR you do) BEFORE the injectors that decrease the orriface size by more than 50%, you are NOT using your very expensive add-on goddies to it's full potential, since only a SET amount of fuel can pass through the restriction. If it is AFTER the injectors you will NEVER get it to run lean or at stoich since the "backed up" fuel will just sit in the line and raise the pressure to an unmanagable point for the stock regulator.

With my set up, (RX-7TT pump, SX ARFPR, gutted stock regulator and stock MY 98 injectors and Field HyperR Fuel controler), I can get it to run rich to the piont where you can SMELL the gas. With race gas (100 octane unleaded) I have run 1.5 bar boost with NO problem. Well, stock Ign maps are NOT good at that boost level, but I did not see ANY J&S activity and EGT's were fine, but the car did not pull smoothly through the rev range. AGAIN, Stock ECU with add-ons are FINE, and SAFE for up to, but NO more, than 10lbs boost. Anything more than that, and you are playing with your future retirement fund and food budget.
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Old 04-16-2001, 08:05 AM   #21
wac
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Champagne Gold Opal

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Andre,

Are you sure the stock FPR is before the injectors? If so, how does it raise pressure for the injectors?

My Bell RRFPR is connected downstream of the stock FPR, which in turn is downstream of the fuel injectors. It goes like this:
1. Fuel tank.
2. Fuel pump.
3. Fuel filter.
4. Injectors.
5. Stock FPR.
6. RRFPR/FMU.
7. Back to fuel tank.

-WaC
Wayne
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