robertbartsch

I used LS1Edit last year to tune my modified (H/C) car so it would pass inspection. This year my car failed again with NO additional mods.

HC = 1.36 (limit .60)
CO = 13.35 (limit 10.0)

The inspection tech said this means unburned fuel is in the exhuast and the timing is too advanced.

Is there a better instruction manual for LS1Edit now; how do you reduce fuel/air ratios and timing? It has been so long since I worked with this program that I forgot how to use it.

Thanks..

J&JsTA

Most guys I know will have a reduced timing table for E testing they put in before going to test. A 3-5º reduction in the high octane table for the RPM column that the test is being run in usually takes care of both issues depending on how aggressive your set-up is.

robertbartsch

Thanks...

OK so I download the current program and save it to a disk. Then I find the high octane table and reduce the RPM numbers across the board by 3-5%.

Is the high octane table a separate tab?

Is there a manual on the software now or is it the same junk that is impossible to understand?

Thanks...

J&JsTA

I wouldn't go across the board but you could... just the rpm range in which the idle & curb test is done at .... I can't remember the rpm range here but the mph is 20-30.

The high octane table is a seperate table

NO & YES

robertbartsch

In the user guide I found some (helpful?) guidance.

So I think the deal is:

Go to Engine Calibrations tab
Go to Ignition tab
Go to high Octane Spark Advance tab
Go to RPM column
Edit whole table frame (multiply by 95) providing a reduction of 5%


Right?

Thanks...

J&JsTA

you are correct Sir

robertbartsch

I replaced some hard parts this weekend and will do the programming this week.

I put some new 02 sensors in and some MSD plug wires. The old O2s were really black (too much fuel).

What is the gismo on the fuel rail that is held in by a snap ring; I thought it was a fuel pressure regulator. No parts store listed this part, however. One of the codes I was showing a few weeks ago was a high fuel pressure reading in the fuel rail (passenger side)?

robertbartsch

I'm confused.

Is the "idle and curb" test done while the car is using the high octane table?

Is the low octane table only used when the knock sensors detect detonation? Is it possible that since my cam is larger than stock that the knock sensors are telling the PCM to use the low octane tables?

Cstick

You meant .6 on CO right. I have 1.4 CO on my non cat, cam, headers car. 0.6 I believe is the limit for CO in most places. And for HC none of those numbers can be right. 50ppm HC would be an really efficient cat car.

CAT3

iTrader: (9)

Robert, mutiply the table by 95% will only reduce your timing about 1.5*. You can select the whole table and subtract 3, 4 or 5* easier.
Also there is a tab for idle fuel, one for base timing, and then the VE table. Reduce the VE table as you would for most cam tuning, reduce the first column I think its 400rpms x70%, then next one x75%, and so on up to the 1200rpm column (hang with me here, I havent touched edit in 8 months due to my current deployment maybe off a few rpms on the columns). Tweak the tables a little and save the new one as Etest. Good luck man.

Cstick

10 would be OK for CO2. Is that what you were thinking? CO+CO2 should be over 11% for a valid reading.

robertbartsch

I reduced the high octane and low octane tables by multiplying all cells by 93.

My engine runs a lot different (stronger?) now. I need to check my Ltrims with another computer program (OBD2) to see if I am in the ball park....

I did not see a way to reduce the RPM values at the top of the table. I'm I missing something?

robertbartsch

I'm looking at the NYS inspection report now

2004 Allowed HC = .60 gpm (my test = 1.36 - fail)
2004 Allowed CO = 10.0 GPM (my test = 13.35 - fail)
2004 Allowed Nox = 1.5 gpm (my test = .82 - pass)


Last year the test was easier for the same make and model car (99 F-body)

2003 Allowed HC = .80
2003 Allowed Co = 15.0
2003 Allowed Nox = 2.0


This seems unfair to retroactively tighten the emmessions standards two years in a row - AFTER the car was manufactured.....