Jet Performance Chips.

I own a 1994 Mazda B2300 with a 2.3 or 140 ci engine I want to know it;s it's worth spending 303.00 dollars on this chip or is it just bullshit?

on a 94? Very likely to be a waste. Thats without knowing what its actually modifying (if its modifying anything), but there was very little that was adjustable on that year through normal means. That doesn't mean it isn't capable of modifying things, but it would probably do it in very hackish ways (changing things globally instead of changing portions of curves, etc)

the 2.3's were gutless because of their engine design vs application, not because of their engine management. I have a slightly older version of the same thing. They are REALLY gutless without some relatively extensive mod's.

I hate the truck.....but I got it for free, so I can't complain too much

She does well enough for a 4 banger. She gets up and out of her way fairly easy.

i'd say it probably won't be worth it for a few reasons: 1) as stated, they're gutless because of their design, and 2) because it won't get you much, if any, improvement. that engine had what, 120hp stock? (my dad's B3000 had between 150 and 160 at the crank when it was new) it probably has alot less than that now. with that kind of power to start with, you probably won't be getting much power from anything cheap. and finally 3) lots of so called performance chips are scams, not all, but i've heard of alot that do some stupid stuff like make your engine run rich and actually reduce power and fuel economy.

Most of those chips take fuel out and add spark. In stock trim, most ECMs are programmed to run rich. Its an attempt to quell warranty claims by providing a detonation barrier as well as cooling the combustion for lower NOx emissions (at the expense of slightly higher HC emissions).

Most of those chips pull a tad out of the fuel curve (worth a couple ponies) and add more timing (worth a couple more, but you typically have to run premium to do the timing change.

Seriously, on a B-pickup, you'll take it from 120hp to 127hp, not feel a lick of difference, pick up .1 mpg, and wonder why you spent $300 on a chip that won't pay for itself for another 750,000 miles. Its different on a Vette where you can pickup 25 hp and 2 mpg, but save your money for a bedliner or something instead.

the newer vettes, and many other newer vehicles, actually have reprogrammable computers. Thats my main issue with this AGE of vehicle. Part of OBD2 was that is had to include recalibration capabililty. Not so on pre-obd2. I don't know for a fact if this falls into the catagory, but IMO, its very unlikely.

If its not reprogrammable, the only thing a "chip" could do is modify the signal of a sensor. That won't "reprogram", that will only tweek an existing curve.

I'm making some assumptions of course, but really, its not like they will tell you what they are really doing, and it would be way too much effort to discover what they are really doing.

Gas engines are nothing like diesel engines. Adding more fuel or adjusting fuel timing wont' have dramatic effects. They are fairly good from the factory. You have more to gain from tranny shift points IMO than you do with EFI adjustments.