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[jtgh]

throttle spacer does nothing ( ecu learns it in 5 minutes and zippo) have dyno plots. and many to prove that. see my snake oil page.
chip.

if you can tell me what a CHIP is , ( please do) Fleebay, wow.

notice the brilliant obfuscation there ( amorphous , nebular)

Marketing BS , all.

The trick is to fool the ecu.
tell me what why and how, do you wish to fool the ecu? ( can be spotty)

This is called piggybacking (chip is BS) what do you wish to fool.

You first need to know the ECU is programmed to run in CLosed loop
full time (not W.0.T)
this runs 14.7:1 AFR.

to get cheap power, some ppl force the ECU out of closed loop.
If your motor is tuned and the senors are not bad, you can do this by pulling the O2 sensor.
some ECU's will go to the intrinsic AFR which is 12.5:1.
its illegal but out of the factory it was tuned to do that.

this will give you maybe 5HP.



want more power (8v is low) get the 1.8L and drop it in. 2.0L 2001+ is better.
or
a Grand Vitara V6.


The 8v cant breath and that is why they have the 16v.

the old ECU 91 , can get real upset with bad sensor inputs (piggy backs)
it gets upset and then punishes you with FailSafe mode.
Rich and retarded timing

so fooling it can be like throwing dice.

snake eyes.

Tuning a car without tuning the ECU, is mostly a waste of time.
but you can trim it a little.
Just like in the old carb days, tuning the motor with out rejetting is a waste of time.

same rules, diff, hardware.


or just buy a 4.0L or bigger jeep.
the jeep has more power , out of the box. and lots of potential.