General EPROM/SAFC/tuning question.

[scott90gsx420]

I'm going to say sorry up front now this is my first ever post so if there are issues just say so and I'll be sure not to do it again.

Ok so I rebuilt my car last year. Everything is running really good but I've been getting really wary about my tune as i haven't tuned it since it was cold outside. I have a Wideband but the visual display unit decided to spas out and they no longer make this model so I can't get a new one. (no logger either and wont have cash to get one for a couple months) But I've noticed that everyone says my Evo 560 injectors (base fuel pressure is 46 so I'm sure its more then that they flow like 580s at 43) and 2g MAS will leave me running a little rich.

What's got me confused is all my settings are very close to zero on the low SAFC settings. The high are also very close but I've had to add fuel from 3000rpm up? How is that possible?

Anyways my question is I pulled my ECU out today (first time I've looked) and its the stock 90 ECU and it is EPROM. The chip is stock but on my ECU cover it says capacitors and caps replaced 03/27/03. I need to know if its possible they flashed the chip and saved the settings for my mods?

I'm just trying to figure out why I'd have to add fuel to the settings as apposed to pulling it like I thought I'd have to do? I have just really started running the car hard as I wanted to let everything set properly and I don't want to detonate the car apart. I always check my plugs and look threw the holes and my cylinders appear to be like cleaner then I remember. Could this be because I'm detonating?

They don't look sand blasted they just appear to have less carbon buildup then I thought they should. The car pulls like a beast all the way to redline and I've never hear pinging or the car pulling timing (which I know what it feels like I had the issue the first week or so car was running) and I've been running it pretty hard the last two weeks.

Sorry for all the questions hear but gist is I need to know:
1) Could the chip be flashed and tha'ts why my settings are so weird?
2) Why are my pistons appearing to have little carbon build up, is it due to knock?
3) Would I be able to see signs of detonation on the plugs and cylinders if it was in fact detonating or am I just being a newb?

Also have an EGT gauge and my temps never ever get above 1500 at WOT, actually they barely ever touch it and the temps are within normal ranges at cruise and idle.

Any help is much appreciated. I have severe OCD about my cars and the slightest sound I'll pull over and start trying to diagnose issues that aren't there . (Getting annoying I never listen to music or anything) Oh and the only mods I've personally done to my car is the new turbo, balance shaft removal, and the rebuild. I bought it with a blown head gasket from a guy who bought it in the same shape, but chose it was to big of a task so idk how it ran before.

No help? Haha thanks guys I appreciate it

 

[Absit]

Injectors that flow 560@46 PSI would flow LESS, not more at 43 PSI.
Yes, without a tune you'll be running rich, very rich. You threw on 25% more injector and the ECU can't compensate for that.

Something you really want to consider for your next post is format and spacing. A lot of people probably saw your wall of text and just closed it. I almost did.

I don't know about your ECU.
I doubt knocking would clean your pistons up.
If you have OCD about your car you need to get your wideband back up and running and a logger.

Sorry I couldn't be more helpful, but I added what I could.

 

[steve]

I've noticed that everyone says my evo 560 injectors (base fuel pressure is 46 so im sure its more then that they flow like 580s at 43) and 2g mas will leave me running a little rich.

Whats got me confused is all my settings are very close to zero and the on the low safc settings. The high are also very close but ive had to add fuel from 3000rpm up??

How is that possible?

Anyways my question is I pulled my ecu out today (first time I've looked) and it's the stock 90 ecu and it is eprom. The chip is stock but on my ecu cover it says capacitors and caps replaced 03/27/03. I need to know if its possible they flashed the chip and saved the settings for my mods? I'm just trying to figure out why I'd have to add fuel to the settings as apposed to pulling it like I thought I'd have to do.

Low setting on an SAFC are for closed loop (when the ECU is using feedback from the O2 sensor). The high settings are for when your in open loop.

If your ECU has a stock chip in it, the programming hasn't been changed. The stock chip has a label over the EPROM window used to erase the contents. Most reprogrammed chips will have a different label or none.

 

[scott90gsx420]

Injectors that flow 560@46 PSI would flow LESS, not more at 43 PSI.
Yes, without a tune you'll be running rich, very rich. You threw on 25% more injector and the ECU can't compensate for that.

Something you really want to consider for your next post is format and spacing. A lot of people probably saw your wall of text and just closed it. I almost did.

I don't know about your ECU.
I doubt knocking would clean your pistons up.
If you have OCD about your car you need to get your wideband back up and running and a logger.

Sorry I couldn't be more helpful, but I added what I could.

How would they flow less? I thought more fp would increase the size of the injectors thats what ive read but i could be wrong. Ya i have called all the little electric shop around hear to see if someone could repair the display unit and no one can so im gonna have to buy a new one

I also have a 2g mas in the car so that should help balance it out more. I also thought i was hitting fuel cut in 3rd-5th in higher rpm's, but ive decided it cant be fuel cut as sometime the rpm it does it at will change and it doesn't always do it.
So i must be running way rich.

I just added the blue wires mod untill i can get my WB fixed. During idle it is very slow to cycle if at all. During cruise and light throttle it sweeps normally(few times a second.) Under boost i try and watch it and my volts read like .73- .76(LEAN WHAT????how is my car even running anymore if thats the case but )
Ive read 90's read .1 volts lower then other cars does anyone know if this is true? If so my volts are close to good.
Steve ive been trying to pm you for months haha. It says your private message box is full. Ive seen your post all over the place from years back and i know youv got the stash box on safc tuning .

My biggest thing now is my studdering/fuel cut issue? IDK if running lean could cause that type of backfire. If someone could help with that id much appreciate it.