MdFormula350

Failure all 3 first try

-chip had injector constant at 22, and I just put in 24s.
-chip 8 base timing, base timing set at 8 on engine.
-stock timing chart as well as stock fuel chart I believe.
-fan 1 I turned off, fan 2 I believe came on with the stock fan switch in the head, since it didnt get to the redline in temp but was def. up there
-outside was raining and about 58 degrees outside and humid

HC CO NOx
State 1.0000 GPM 20.0000 GPM 2.2000 GPM
My 1.7454 24.2047 3.3139
F F F

Failure 2 out of 3 second try

-chip injector set to 26, and I have 24s
-chip base timing set to 12, base timing set at 0 on engine.
-stock timing and fuel charts.
-fan 1 set at 235, off 230, however while I set sitting there it got passed 235 it seemed and I got worried and flipped my fan 2 switch on, so the whole time the fan 2 was on and the temp on the engine was about 190
-outside temp was 65 and sunny

HC CO NOx
State 1.0000 GPM 20.0000 GPM 2.2000 GPM
My 1.1174 16.5176 2.5409
F P F

Just from those readings I am going to double check my fan 1 does come on, and I think I am going to up the base timing in the chip to read 20.
would it be ok to try and lower engine base timing to under zero?

From these readings what else should I touch, since all did lower alot.

test 1 printout



test 2 printout




thx

Zeikjds

hey do 5 gallons of gas 5 gallons e85, drive car around 15 minutes before keep rpms higher so cat can get nice and hot and then go pass emissions

MdFormula350

well my egr, a.i.r, charcoal canister, muffler, and cats somehow fell off at the moment

but thx though. but rather try to do it through tuning and just wondered if I am going in the right direction making the computer think it has higher injectors and less timing. I think I am though.

vernw

iTrader: (2)

I just put a quart of denatured alcohol in with about 6 gals of premium in the tank and she passed with flying colors (first time ever with the 383!)

MdFormula350

might have to resort to stuff in the tank I think, if I try one more time and fail due to de-tuning.

86 Cali IROC

I wonder if here in Cali they are worse? I'm trying to smog mine after sitting for years, and it's a bit rich. Changed plugs,oil, O2 sensor, and added an additive called Guarrantied to Pass. Anyone heard of it? Will post readings next week.

MdFormula350

3rd fail time.

weather was shitty today, not raining anymore but humid and around 55 out.


this is what i tried today.

new chip with engine timing at 0, chip base at 0
lowered max timing from 42 to 30, and lowered all timing -5 on the charts

injectors set at 24 which they are, and for hte fuel charts -5 throughout.

1/4 of the usual 93 gas, 2 to 3 bottles of the 91% rubbing alcohol and a small thing of octane booster (i am getting desperate).

fan comes on at 231 off and 225, stays on if it needs till up to 137 mph so if it overheats while running at 60+ mph on the treadmill it will stay on.

HC CO NOx
State 1.0000 GPM 20.0000 GPM 2.2000 GPM
Readings 2.1073 GPM 15.6176 GPM 3.8295 GPM

I guess I need to start over again, and my my 3 test so far, I dont think it likes to run hot??? At least the NO is always high when it runs hot, maybe I need to cap the temp to 220 and no higher.



any comments or suggestions? I have till FEB but want to get it done while the temps are still decent out.

vernw

iTrader: (2)

Part of your problem this last time was using RUBBING alcohol. That was a worthless attempt. It has to be DENATURED alcohol to help with emissions. Only place I found it was in the paint thinner section at Lowes and Home Depot.

MdFormula350

lol, well that might have something to do with it

Ill check tomorrow at lowes.

I am on the right track I think, at least was but my HC and NOx got alot worse.

my second test where the weather was decent out and I had the engine running at 185, timing set at 0 on engine and chip base was at 8, injectors i think I put at 26. I will go back to that tune, and do that alochol and try again.

thx for ur time.


after reviewing some things I am going to take out my timing higher in the rpms since they seem to have to get on it some to increase the speed, as well as some fuel when the ecu sees higher rpm or map pressure.

duncz

so your last test was on the treadmill and I am to understand you are running no cats egr or air?

MdFormula350

all test on treadmill, yeah no cats (someone cut them off, and I didnt feel i needed to buy them again ), non air header, no egr, no charcoal canister.

I am going to put back the tune I had on the second test where I almost passed and try that D-Alcohol stuff. Like a dummy I filled the tank to full, but I wanted to run out all that junk I put in the tank so I need to ride around a bit this week to get down to 1/2 tank before putting in the alcohol.

I am going to lower the fan temp (test 2 I ran fan on the whole time 185) some because I think the Nox gets too high when it runs too hot, since in general Nox in from the heat in the combustion camber, and without fresh air (egr) it will run alittle high. The CO is about the only thing I am passing now which is stricly from being too rich if ur too high lean it out some. The HC is unburnt stuff so timing can affect that as well as being too rich or too lean, so thats usually the hardest to get passed, but some what I heard unhook the pvc valve too keep the unburnt stuff going back into the engine.

also now I am learning if the person testing the car doesnt do it too smoothly it affects the readouts as well, so far I have had 3 diff. people testing with 3 diff. outside temps and weather condition.

so far the best (test 2) has been when running high injector constant like 26 when i have 24, running the fan on keeping the engine cool at 185, running 0 engine timing with chip set to 8 base, also taking out -5 timing throughout the chart. also it doesnt run as good with higher speeds vs. lower speeds. I have time to find out a solution

DENN_SHAH

iTrader: (1)

i doubt its going to be easy to pass with no EGR or cats.
the main thing that reduces NOx is the EGR valve, aftermarket cats usually don't do too much for it.
if it were just no cats, i think you should be able to pass with a well tuned chip unless you have done some motor mods you don't have listed at your cardomain site.
i got my car to pass without cats, but i have access to an emissions machine that i tuned my car on under the same conditions of the test. also, here we do a steady state 2 speed test, 15 MPH & 25 MPH. it looks like you have to do the IM 240 test which is harder to pass.
engine temp doesn't affect NOx as much as you would think.
from around 120 up to around 230 there isn't much change, generally just a few PPM, but in this case every little bit helps.

my thoughts, like you said, go back to the tune you had on the second test.
maybe set the injectors to 27 or 28, pull 1 or 2 more degrees of timing.
also, i can't tell what the speed was on the tests, but if its higher than what the torque converter is set to lock at, raise the TCC lockup speed well above the top speed of the test.
if the TCC locks, it gives a big spike to NOx. keeping it unlocked can also help HC.

vipershark11

iTrader: (6)

sorry i just found it hilarious good luck on trying to pass i might need to do what you do since im in the same boat.

MdFormula350

yeah good looking out on the tc lockup, yeah I think they get up there in speed 60 however my tc locks stock while crusing at 38 like a stock car would and I think they ride around in overdrive as well.

either way on the test I dont think they get over 3500 rpms on the engine, I guess I need to disable locking of tc up there.

I will check a few things on that, yeah it really doesnt like the part where they cruise at like 65 or so for a few seconds as you can see as speed increases all 3 readings so as well.

back to the test 2 stuff and tweak it some more.


I am looking pulling off the pcv valve might help some because it wont let the unburnt stuff back into the engine.

MdFormula350

test 4: kinda getting somewhere. failed hc, passed CO and NOx

things i did.

1/4 tank of 93 like usual with 1 gallon of denatured alcohol.
fuel injector constant 26
stock fuel charts but -1
timing: 0 on engine, 8 base in chip, -10 on stock spark charts, max timing advance 25
torque converter lockup at 50, instead of 38.
fan on a 225, off at 200.



HC CO NOx
State 1.0000 GPM 20.0000 GPM 2.2000 GPM
Readings 1.7634 GPM 11.9250 GPM 1.8673 GPM



I think since this is my first time running the denatured it might now be too lean now?

vernw

iTrader: (2)

I think you might have gone too far with using 8 times the denatured alcohol I suggested (I said one quart in half a tank) and dropping the timing so much. If I remember correctly, the high HC indicates unburned fuel, probably from the retarded timing (or a fairly wild cam with lots of overlap).....

MdFormula350

I think is was too lean maybe? since Co I think deals with only the richness of the fuel mixture and with that being so low I think the Hc might of read high just because it was too lean.

yeah i overdid the alcohol since I thought the more the merrier, but now I added more 93 in the tank and will car the car down to 1/4 tank and throw in a one quart can.

I give this a try soon and test again, but now I am distracted since some a-hole rear ended me in my ws6 so now I need to get that fix, and would like too before the new year.