Actually, the kit was for all Renix Jeeps to eliminate the "loom" wiring from CPS to ECU.

Post 27 in my tips covers eliminating the C101.

Your CPS wiring should have nothing but soldered and shrink tubed connections. NO butt connectors.

And here's the pic of the fuel pump ballast resistor Flintstone referred to.

 

Fine then. But who with an 89 or a 90 would do that? (unless some Jeep tech snuck in the there and grounded it. ) And thanks again.

 

Jeep techs DID do it!!

This one now does C101 elimination (post 27), and Sensor ground upgrade (post 6) on all of them.

 

In the few miles I drove it, it did not buck. Usually it does it around 40-55mph. Its when I cruise to work at around 45mph for a few miles steady. I only drove that speed for a quick few seconds trying to get my operating temp up after adding coolant.

Cruiser my connections for the CPS were shrink tuned but they have a almost square 2 wire connector. Tomorrow I will have to take a pic and post to see if its what you mentioned.

Side issue: No matter what the drive or distance I cant get my temp gauge close to or at 210. It stays midway between the lowest mark and 210. Its been doing this for about a year, not related to me resend water pump install. Maybe stuck open Thermostat?

 

We dont have to run 210 mine runs around same spot for years like 195 .

 

Or crappy one. I use only the factory stat anymore. 52028186.

 

Here's what my cps connector looks like. In the pic without the sensor visible you can see the wires shrink wrapped. Is this what mine should be swapped to?

If so, when I buy new cps does any come with this style connection?

 

My 95 started bucking bad, I checked everything and it was all correct (ohms), finally bounced it off a buddy of mine (Chrysler tech) and he said 02 sensor. I told him I've got no codes he said change it out anyway. I listened and it fixed it. Not saying that's what's wrong with your, mine did it more often then your describing but it's worth a try

 

Well the bucking did not go away, the only things I havnt replaced are o2, map, cps, coil.

Sometimes the bucking happens when letting off the gas and then giving it gas again. Other times its a steady speed and rpm and it will do it.

Also not sure if this is related but sometimes when a light turns green and I give it gas it seems to die out for a split second and then take off. Almost like when a carb is run in rich and you give it too much gas and it dies, but mine never dies. It just basically stalls for a split second then takes off.

 

Desert, that's a different connector there. The original CPS connector was a flat, black, three wire connector, with only two wires going through it. Suppose it should be fine if the connection is good. Of course there will be a problem if you go to change it as the new plug will be different. I gather it's a sort of "spiked", square wave, (as opposed to a true sign-wave). It may well be polarity sensitive. (probably can't reversm')

The shift point on my 90 is such that right there around 40, sometimes it has an issue picking a gear. Might up-shift, or down shift with a slight change of the petal. (might feel like a "buck")

 

Ok throw an o2 sensor at it then now it sounds like my symptoms

 

Bad O2 sensor gives an unstable idle on a Renix. Not the symptoms he's describing.

Look at this and make sure the CPS wiring is good and not burning on the engine.

 

As a mechanic I can tell you that's not always the case it could be fine at idle and bad at other rpms. Half the time you don't notice a bad 02 sensor other than the brought orange light on the dash. I won't go back and forth with you. He's asking for help I had a similar issue with mine that didn't affect idle but did at higher rpms. He can try it or not, it's just my offer of help

 

It is on Renix. They use a primitive system and a different type of oxygen sensor than you're used to. No CEL.

I was Service Manager and Shop Foreman at a Jeep dealer from 1980 through 1992. Just so ya know I'm not arguing. Just speaking from experience. .

 

Cruiser's word is like gold! On a non renix system he may have some experience but renix is a whole nother world of diagnostics.

Cruiser did you see the pic of my cps connector? Did that look similar to what they were doing at the dealer when updating or whatever it was they did?