What's your A/F on Overrun?, 'Nother D-Jet A/F Question Options

[BeatNavy]

For those with D-Jet, what are you typically seeing for A/F ratio on a medium to hard overrun? Based on what I've read here mine seems too rich - like in 10's and 11's. Once the RPM's drop closer to idle it bounces back up to normal idle A/F ratios. Does A/F on overrun even matter?

[BeatNavy]

I played around with my MPS, decal valve, tuning and a host of other things since I originally posted this. Car runs great, idles well, and is blast to drive. But I still see AFR numbers in the 12 range during decal, and my MPG numbers are not great. For the most part, I've given up worrying about it much, particularly since I have plans for a different motor before too long.

All good (IMG:style_emoticons/default/beerchug.gif)

[Olympic 914]

I played around with my MPS, decal valve, tuning and a host of other things since I originally posted this. Car runs great, idles well, and is blast to drive. But I still see AFR numbers in the 12 range during decal, and my MPG numbers are not great. For the most part, I've given up worrying about it much, particularly since I have plans for a different motor before too long.

All good (IMG:style_emoticons/default/beerchug.gif)

I also have played around with my MPS, and timing.

On decal I see around 15.0 + afr. I may be running a little on the lean side though.

But on a cruise the AFRs vary from mid 12s to high 14s depending on throttle position.

Do you have a meter to check your MPS values? I have notes around here somewhere with where I set the MPS on my car. Maybe we could compare settings.



Little different system since I have the 037 ECU

[BeatNavy]

I played around with my MPS, decal valve, tuning and a host of other things since I originally posted this. Car runs great, idles well, and is blast to drive. But I still see AFR numbers in the 12 range during decal, and my MPG numbers are not great. For the most part, I've given up worrying about it much, particularly since I have plans for a different motor before too long.

All good (IMG:style_emoticons/default/beerchug.gif)

I also have played around with my MPS, and timing.

On decal I see around 15.0 + afr. I may be running a little on the lean side though.

But on a cruise the AFRs vary from mid 12s to high 14s depending on throttle position.

Do you have a meter to check your MPS values? I have notes around here somewhere with where I set the MPS on my car. Maybe we could compare settings.


Little different system since I have the 037 ECU

My Air/Fuel numbers are pretty good - similar to yours at cruise.

I've actually swapped out like four different 043 MPS's in an attempt to figure out what was going on. Last year I picked up one rebuilt professionally by that company back in the day (Fuel Injection Corp?), and I used that for a while. I assume it was calibrated to stock 2.0, but I didn't notice any real improvement in my MPG, although I was probably slightly lean at cruise.

Earlier this summer I picked up a stock, unmolested 043 that I wanted to use to baseline my MPS values on my inductance meter. That confirmed my suspicion that my (cheap) inductance meter provided significantly different values than those documented by Anders, particularly at part and full load (idle wasn't too bad). So I've used that stock 043 as my "calibration," and adjusted my other MPS to just slightly richer than stock.

I can definitely share my numbers, but what would probably really help is to let you use that stock 043 so you can also calibrate your inductance meter. It's my guess that different models/meters can vary quite a bit. Let me know if your interested.

In terms of my mileage, that remains somewhat of a mystery to me. It could be multiple factors. It could also just be what it is.