'94 LT1 EEHack analysis using WB

[91ss]

Cool. Curious, how does EEHack accept the analog input? In mustang world, we tend to use the formally used egr input into the EEC for analog or the separate digital output straight into the laptop.

[babywag]

The MTX-L seems to work very well.
I have both outputs in use, stock o2 sensor was removed, and pcm is being fed an analog signal from the MTX-L.
Other output goes to EEHack via pin D27.

Watching the gauge while I drive, jives with what I see in the data logs. So I am confident it is working correctly.
I used it in the past, in the same way to tune my Jeeps running 16197427 pcm's.
Loaned it out to a buddy, and he also had good results using it on his LS swap in a Jeep.
For the $ the MTX-L is a quality piece IMHO.

I would love to get one of the new Innovate dual WB's, maybe some day when I get some disposable hobby/play $?

[91ss]

The MTX-L seems to work very well. I have both outputs in use, stock o2 sensor was removed, and pcm is being fed an analog signal from the MTX-L. Other output goes to EEHack via pin D27. $?

Don't have schematics here. What was D27 used for before? It's not recommended in the ford camps to replace the NB with a pseudo NB signal from a WB. In general, it adds a conversion delay and the ford eecs sample with an expected delay as it switches it's LAMBSE's back and forth. If it doesn't detect the mixture yet switch cause of the delay, it continues to swing the LAMBSE further than needed in order to detect a switch happening. Guys are always told to weld in a dedicated bung especially when they seem to be chasing tuning ghosts. I would think the GM PCM's work similar.

[steveo]

Cool. Curious, how does EEHack accept the analog input? In mustang world, we tend to use the formally used egr input into the EEC for analog or the separate digital output straight into the laptop.

the rarely used egr position on pin d27, or the ac pressure sensor input, both are in the stock datastream

unfortunately they aren't great for linearity but they're good nuff with a bit of tweaking

[babywag]

Can't speak on any technical aspects of simulated NB signals. I've read the arguments from guys saying it doesn't work/not recommended.
I've done it before, and compared tunes after the fact with a NB installed and the WB in a dedicated bung.

This was just the easiest method/solution on the car for me.
It isn't a track car, and just a stock engine with 140k on it, that I wanted to run better. Fuel isn't the same as when they were built/tune developed by GM.
It's pretty obvious with the WB installed that they're running on the lean side.
My initial data & calculations showed it was off by ~4% running the stock tune. With a little tuning it runs much better, and I'm happy with the results.
Might not be the "right" way, but it works for me.

[yoheer]

old thread to the top
I need some explanations
Ive got an innovate wb sensor. Just the sensor with no controller. Is there a way to make it work directly? And if yes then is there any manuals how to do it?

[WASyL]

Nope, you need to have WB controller.