Actually, That's probably not the problem if you were getting a reading of 19AFR (~5V) I guess it's good to be rigorous, but probably a waste of time.
Where were you measuring the voltage from? I REALLY hope the readings are wrong because if it's putting out a narrowband signal this all makes sense. If not, I don't really have much else to offer except some jokes about cows

 

I cant locate r10. I didn't build the unit, have no interest in building the unit, and don't have a diagram of how it should be. At this point, all I want to do is sign over my paycheck to someone that can fix this. 30 some hours of zero progress is really frustrating.

 

Section 3.2.1 of the mtxl user guide. It's the analog output programming. It can be programmed to emulate a narrowband.

 

From the manual

 

If I'm not mistaken, he's seeing the proper 0-5v signal at the MS, so it's not a gauge problem

 

yeah, I just checked with the o2 sensor at 22 afr per the mtx gauge, I do see 5v. at the pink wire on the ms. so, correct config on the analog output.

 

I think it is this MS unit. I found the build thread from the guy I bought it from, he never got the car to run right and eventually parted it out.

1. I have ID 1000's/ walbro 190hp and have to use a req. fuel of at least 6.0 just to get it to kind of run, and not even close to idle. 3.0 and it runs for 10-15 seconds then dies. Sitting at 3k rpm it will be running, then just stop, like I turned the ignition off. log shows nothing obvious. This is all on a base map. running the stock FPR.

2. Auto tune will not make any adjustments, regardless of settings. (could be related to discombobulated 02 readings)

3. My WB does not correlate with TS, even though I have a confirmed 0-5v output in the pink 02 signal wire. Once the correct signal goes into this black box, its out of my hands.

I was pretty comfortable with my ms2 and my car used to run great! So its not like I started trying to use TS yesterday., although it feels like that at the moment.

 

It very well might be a dud megasquirt. Still have your ms2? II would contact diy, they can diagnose and tell you what is wrong. I've found emailing them gets the best response.

 

sold the ms2 to fund the 3. I emailed them today, should hear back tomorrow.

 

progress

 

stuff and things

 

I'll check the running voltage.

Good to know that require fuel is just a random number.

The rest of your suggestions I understand and have tried in any configuration you could imagine. I even started an entire new project tune, thinking that maybe my first one had become corrupt somewhere. Same results.

 

Slight hijack: with WBO2 setups that have a simulated NB output, can the NB output wire just be connected to the harness end of where the single-wire OEM O2 sensor plugged in (e.g. in an OBD1 car), and will it then work just like the OEM sensor with the stock ECU?

 

Yes

 

I would disagree with that. Look into the code and how it's used, it's not just a random number, or at least in the past it wasn't. It used to be used in more than just the fuel table, other things as well were messed up if req fuel was wrong. I just use whatever req fuel it calculates, I don't see any benefit to changing it, my car runs perfect as is.

 

REQ_FUEL is a scalar in the Pulsewidth calculation algorithm.

PW = REQ_FUEL * VE * MAP * E + accel + Injector_open_time

E = gamma_Enrich = (Warmup/100) * (O2_Closed Loop/100) * (AirCorr/100) * (BaroCorr/100)

So an "incorrect" req_fuel can be "fixed" by tuning VE.

Source: http://www.megamanual.com/v22manual/mfuel.htm

 

Question, cause I'm not digging through the current code. But in the past, it was also used in places other than just the PW calculation. If it's ONLY used in pulse width calcs then sure, modify it. But is it used anywhere else? Like warm up enrichment, or acceleration enrichment, or anything else?

 

Read my edit. PW takes into account the Warmup and accel.

 

I'm browsing the current code right now.

 

Also what about injector dead time calcs, wouldn't those cause problems?