Would this do anything? Chip?

[Jackrabbit41]

I've never seen one before and didn't know it was possible on a renix, would this chip do anything? Anybody suggest one? It'd be nice to try and get some power but I doubt this would do anything at all. 

 

http://www.amazon.com/gp/product/B00WFIJUYW?keywords=jeep%20comanche&psc=1&qid=1457586559&ref_=sr_1_1&sr=8-1-spons

[gogmorgo]

Considering its supposedly good for both Renix and HO's, imma call :bs:

But hey, it won't void your factory warranty :teehee:

[Jackrabbit41]

Considering its supposedly good for both Renix and HO's, imma call :bs:

But hey, it won't void your factory warranty :teehee:

where would it even plug in?

[gogmorgo]

Usually these sorts of things are hacked into the map/maf sensor wires. If they do anything at all, they might be a resistor that messes with the signal and then hopefully the car runs a bit richer. In theory it works, except the O2 sensor tells the ECU something's up, and it will pull fuel to correct the mix. But it might just be an LED. Best case scenario, you wire it in and nothing happens. Worst case, it screws with your ECU, leads to overfueling and burning out of the O2 sensor, or just does something else stupid and undesirable.

[krustyballer16]

I installed one that said it worked on the 4.0 and a VW TDI motor (that right there should tell you...)

And it did absolutely nothing. It livened up the jetta a bit but did nothing for my 2001 xj.

[Eagle]

Usually what the chips do is alter the timing curve to allow more advance. The trade-off is that they require high-test gas to run. This one claims to fit the renix 4.0L but I don't believe it -- and I think you can get the same benefit by running a high-altitude CPS with high-test gas. With the high-altitude CPS, if you choose to run regular gas, the knock sensor will control the timing so you don't damage the engine. And that's why any chip for the Renix won't show any improvement unless you run high-test ... the knock sensor and CPS keep the timing as far advanced as it can go anyway, so the chip can't override it.

 

Save your money, IMHO.