Does anyone know if any performance chips (particularly JET) will work with the 1990 cherokee computers even though they always list for 1991 and newer??

 

It will not work. Don't even waste your money. They don't work on any year xj.

 

Replace your CPS with a PC307 from RockAuto and that will advance the timing a bit. If they still have them. Be sure to drill the upper mounting hole. Post 7.

Be sure your distributor is indexed correctly. Post 13.

In my link below........

 

Thanks alot, im def going to check that out.

 

HEY Thanks for the info

 

Didn't someone make an upgraded ECU for the RENIX? I remember someone here saying they had one...Cruiser?

 

There was one, but rare. I don't have one though.
I have my own methods to pull a bit more HP out of the REnix motors.

 

EDIT: nevermind, stupid slow refreshing.

Cruiser IS the upgraded Renix ECU.

 

That would be a good write-up for the future, eh?

 

Go Go Gadget Microcontroller!

Could be a real problem with the holidays coming up. How many people at the dinner table will be able to talk like a DRB?

 

You oughta see my USB port!!

 

Just a thought, Fords' inline had a chip and a similar setup to ours could some wiring genius make that happen?

 

Well considering a lot of "chips" are actually resistors that fool the MAP sensor, sure, why not?

 

Called a MAP sensor adjuster.



http://www.strokedjeep.com/regulator.html