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FM O2 signal modifier

FM O2 signal modifier
FM O2 signal modifier
8 Review(s)

Availability: In stock

Customer Reviews 8 item(s)

8 Item(s)

2nd best thing I've ever bought for my Miata
I was on the fence about buying this because another reviewer didn't have luck using the O2 modifier in conjunction with his FFS PC Pros. I'm glad I bought it though, my experience differs greatly.

The O2 modifier not only completely eliminated the lean tip that I occasionally experienced (maybe 1 out of 5 WOT accelerations), but the throttle response has been improved to a degree I did not believe possible.

I have a 2004 with an FFS kit and PC Pros, I understand that it can be very difficult to tune out lean tip in with the NB2 ECUs, but FM's O2 modifier is the ticket. I am so happy with this product.
Review by Spurius Maelius / (Posted on 6/23/2020)
FFS Powercard fix, no dice.
Didn't work for me, used in conjunction with FFS powercards to try and fix a lean TPS blip, tried everything, no difference.

Note from FM: There is no reason why the signal modifier would not work with a powercard, but if there are other reasons for a lean condition on a throttle blip it may not solve those problems.
Review by Andre / (Posted on 11/13/2019)
Works as claimed. Helped with tuning consistency.
And Im running a boosted 1995 Ford (Mazada) Escort!
Review by Heyoldguy2002 / (Posted on 7/7/2019)
Pleasantly surprised
Say goodbye to the dreaded bog
Review by Josh / (Posted on 5/9/2019)
Didn’t work
Did absolutely nothing no matter what I adjusted it to. This has also been the case for a lot of other users. Skip this for a real ECU and tune

Note from FM: A real ECU is a good option, but it's not always an option.
Review by Alex / (Posted on 5/13/2018)
I love this product!
I received this piece from purchasing the FM MSM Intake Kit, and I am really happy with the results. I was a little bit lazy in the beginning, because after the intake installation, I just truely forgot and put it aside until now. The MSM has the NOTORIOUS boost hesitation, but once I installed this to my car (Stock ECU), my car was not hesitating AT ALL. This piece is pricey to purchase on it's own, but I believe for the price you're paying for, it is really such a great deal!
Review by Sam / (Posted on 3/4/2018)
Very low hysteresis O2 signal modifier.
It's functionally similar to the older version that used a Hobbs switch with a 0.3v reference generator, but this one has hysteresis so small that it's practically unmeasureable. So you get consistent results whether you're rolling into or out of the throttle. However, as with the Hobbs switch version, the diaphragm is limited to one bar of boost.
Review by Ray / (Posted on 1/25/2018)
Too expensive.
Buddy.... 129 dollars? Its literally just a pressure switch. I dont wanna be rude but......

Note from FM: It's not just a pressure switch. It's a custom made electronic controller that alters the signal from the O2 sensor. There's a pressure sensor as part of it and it's integrated into a single component, but it's not just a pressure switch. If you try to replace this item with a simple switch, you will get errors due to a missing O2 sensor signal.
Review by Lolo / (Posted on 6/1/2017)

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