When you installed the megasquirt, you need to verify that the timing the megasquirt is showing is the same as whats on the crank pulley. If you have not done this, do it before you do anything more. If you do not have a timing gun, rent one from a parts store or buy one.

anytime you make a change please include the tune file with the datalog.

I can see GVE is at 37 most of the time at 700 rpm, map is around 40-44 which is off, should be around low 30s so timing could be causing this and PW is still out around 2.8 while its in this area. still gair is effecting it and gbaro which causes Gammae to be at 104.

Oh ok sorry. Heres the tune with that last one. And ill check the timing tomorrow.

yeah check timing and wideband sensor like in that video.
If the sensor checks out ok, with those pw and if my guess of it being to rich is correct when you finally bring fueling down enough it will go from --- to 10s

Where is the wideband location before or after any cats?
Is there a narrowband o2 sensor still in the exhaust somewhere?

Car was a cali version with two cats. i cut both of the o2 sensors off when i put on a new header and mounted the wideband sensor in front of the cat. I spliced into the first o2sensor input wire. The other o2 sensor wires are cut and just sitting there. Could that be the issue?

any updates?

Sorry ended up having to work among other things yesterday. Going to check timing after breakfast

Checked the timing and it was very close. Also sensor checked out and works.. Not sure where else to go at this point

from your last log I still say its rich because the pw is around 2.8 at idle area which is a bit much.
mine is around 1.7pw and 1.5duty cycle.

I would take fuel out around your whole idle area, bring all cells in 500-1500 20-45kpa down to 30 and see what happens.

also just because you bring down to 30 doesn't mean its running with VE at 30, there is still enrichments and whats not that will effect final ve output.

You may also want to disable MAT table correction by inputing the correct numbers to zero that out for time being. Will have to find them.


Forgot to mention, test this out for me.
With your timing light attach it to all the spark plug wires and make sure they are getting spark to all cylinders. I had once a old ms1 that wouldn't fire one coil pack and I was able to idle the car at 3.5ms pw at lambda 1 on two cylinder alone, still you smell the excess gas that wasn't burn, since the o2 sensor can't read this non burnt gas it wouldn't show up on wideband gauge.

Ok I checked and all the cylinders are getting spark. Changed the values and it started to run really rough. Timing is perfect and the spark advance table is the one from diypnp's website.
Edit: Not sure where or how to disable the mat corrections..

Ok there maybe something else like different injectors

in your 500-1500 by 20 - 45 kpa area add fuel, increase it to 50 and see what happens, increase it to 60 and see what happens.

At work right now so ill try it and see when I get off

Really wish my wideband would read... If i lower the ve table to say 30 would changing the timing maybe even it out? I cant tell how rich im running without the afr and as you said my pw is still high as apposed to similar cars..

when its at 60 its really making the wideband change, move it up to 70 and see what happens, seems odd though. but we are trying to figure out

Possibility two injectors aren't firing and its causing this issue.
Obviously as we add fuel it seems to richen up as we can see at 60 gve.

What engine related mods\parts have been added\changed\updated?

Raceland header a cat back exhaust. That's pretty much it. And ill test that now

Well your right about something. The wideband came down after i gave it a whole lot of fuel. Not that that makes sense to me..

99 use returnless fuel system? do you know what fuel injectors are in it and what pressure is base set to?

Yes i believe it is returnless. It has stock 260cc and i believe it has a constant of 60psi

260cc at 60psi?
looks like stock 99-00 injectors are 256cc at 3 bar

I would try 9.8 req fuel and see what happens to your fueling.
9.8 is from 1800cc motor
4 cylinder
303cc injectors

used a calculator to see how much the injectors may change size by from 3 bar(43.5psi) to 4.14(60psi)bar~

Hardly would run.. Im going to try and upload the latest firmware and see if all my setting for sequential is right. It seems like i have a miss.