Thanks!

I'm just excited to learn of this very simple and practical solution...benefits yet to be seen but I'm optimistic.

I suppose the non-fouler attached to manifold could always be welded off so no gases hit the probe showing a very rich mixture I guess. I'll just see what happens with this.

If very significant, I plan to add PULSTAR plugs and a few other things to see if I can crank it up more. I did get 43mpg in the city a few years back. With this mod and a few others, I have no doubt I can get 50mpg in the city with this car.

What I get now on average is about 35 mpg in the city and it has about 110k miles.

These are what I want to add later:

pulstar plugs
fuel heater
condensator (pcv output filter)
water gas booster

The only mods I have now for better mileage is just a slighly larger exhaust pipe to relieve some back pressure...not so big it is just a noisemaker. Also, I have a high flow air intake for easier breathing and I have magnets on the fuel line right before going into the intake and RXP fuel additive. With those I did get 43mpg...also, I have AMSOil transmission fluid and engine oil with vacclaisocryptene oil additive (rx oil boost).

Anyway, I'm glad there is an alternative to the circuits that can trick the fuel computer. Those are easy enough to build but this is cheaper and faster.

I agree with Racer, a car you can work on on your own without all the electronic stuff is best. I've had 5 old Z cars and my current one..wrecked from racing...is a 1973 Datsun 240Z with a 2.8 liter engine from a 280Z and a 240z head for higher compression, mallory racing ignition system, triple weber carbs, racing headers and exhaust, etc.... the stock carbs are SU's that I currently have on it the last time I went through inspection. I think these cars at this age are exempt now but I have to tell you...having a lot of engine room (lots of empty space) and just mechanical analog stuff to work on is very very very nice compared to electrical diagnostics and tuning.

Fuel injection, etc... is supposed to be more efficient, etc... but the potential of everything with o2 sensors, etc.. is that they become less fuel efficient, etc...

I saw Chevy's new website and their "most advanced technological" cars they ever had...I saw gas mileage and I get more mileage in the city than the brand new cars get on the highway... and that is with a 16 year old Honda... What are we not being told???