I currently have these mods

AEM V2 w/ AEM Dryflow Filter
Professional Products 68mm Polished TB
Rosko ported & modded 68mm Euro R Intake Manifold
NGK 7mm Spark Plug Wires
Hytech Replica Header 2.5"
Magnaflow Metallic High Flow Cat I/O 2.5"
2.5" Resonator
Kteller 2.5" T304 Piping
Vibrant Muffler 2.5"
AEM Pulleys
aem ems series 2
tuning done to produce 170whp and 129.06trq
AEM wideband
stock injectors
walboro 255lph pump

May or may not help:
CC Delete (Intake air isn't going that way)
Deleted EGR (IDK if it hurts)
M2Y4 Tranny (bwah)
Mishimoto Radiator
Mishimoto Fans
B&M Tranny Cooler


I had complained about shitty ~21mpg with a stock ecu and now after all this have a whopping 17mpg after power and "fuel tuning" What the hell is going on that my mpg dropped? When I went there I was told I would get more power and better mpg and even went back for the fuel tune after the initial tune on the dynojet. He's saying if I went at a constant 60mph with barely touching the gas I'd get 35mpg. Now of course that will never happen but I'm leaned out a lot and barely ever hit VTEC. He says it'll go up in summer and doesn't want to lean it anymore drastically. I know I have an auto but this is ****ing silly. His wife's tuned 5peed gets 29mpg combined. Why is mine so difficult?

 

Need an AFR graph to know what is going on.

 

Yep...the dyno numbers don't help with MPG questions.

Maybe your tuner isn't very good at tuning for MPG on the aftermarket ECU?

 

AFRs are 12.7-12.9:1 under wide open throttle conditions.

 

And again. This has next to nothing to do with your mpg.

It could be a bad tuner though or maybe you have other issues. Power seems low too.

 

its an automatic.

 

5spd will give you more power and better mpg.

 

Was this only dyno tuned at WOT? If this was never street tuned and/or part-throttle tuned, it's not all that surprising you're getting the results you are.

 

dyno tuned for the power, driven around for a week and tweaked for the gas. i know 5spd will give me better everything, isnt an option right now.

 

street tuning for a week?
Who did this?
Was a wideband used?
You can tune partial throttle on the dyno as well.
Street tuning is not the best IMO unless you're making final adjustments at the track after a proper dyno tune.

 

on and off for a week
dms performance in dillsburg,pa. hes been tuning since late 90's
yes
proper power dyno tune was done on a dynojet. gas tune done under normal driving conditions.

 

I had my WOT and partial throttle tuned on the dyno.
Dynojet and dynapack.
Doesn't matter how long hes been tuning. The local tuner here tuned my motor at first and I went to someone good and it ended up making more power and ran way better.

 

are you still running the TCU?