TBI 5.7 swap in my YJ

[DaddyJeep]

Hello everyone. I have been reading here a fair amount and decided it was finally time to join. I will be getting a cable and Tunerpro Rt soon so I can dive into this stuff that I know nothing about. It should be an adventure for sure.

Current state of things... My Jeep runs, but not like it should. It is fine when cold, but falls on it's face once warmed up.

Immediate known issues, TPS readings with volt meter are .12 volts up to a little over 2 volts at WOT. Will be replacing TPS tonight. Also, I am only running a single wire o2 sensor on the manifold.

https://drive.google.com/uc?id=1jxG_...5cUlfhci-1ZI7L

[dave w]

Hmmm, did you get your Jeep that muddy with the TBI system?

dave w

[DaddyJeep]

Hmmm, did you get your Jeep that muddy with the TBI system?

dave w

I did. It was just the one little mud puddle. The Jeep was already stumbling before then so that was the only obstacle encountered before heading back home.

[c5wagner]

You finally joined! Awesome!

[DaddyJeep]

You finally joined! Awesome!

Yeah.... I suppose it is time to start learning something new. I appreciate your help thus far. Hopefully tonight the new TPS gets me running well enough to get on the trails this weekend. I have to work tomorrow and Friday nights and be 3 hours from home by 8:30 Saturday morning to work on trails. Tonight is all I have.

[DaddyJeep]

I put in a new TPS and a new MAP last night. It fired up and idled fine as it usually does. I backed it out of the shop to warm up and it shuts off and won't start. I have fuel, but no spark. C'mon... I just want this thing to work. I won't be able to get back to it for a couple days now. I was really trying to have it running good by Saturday because we will be pre-running the trails for the Bantam Jeep Heritage Festival. Oh well.

How big of a deal is the 3 wire 02 sensor? This is a trail Jeep. Fuel economy is not a concern. There is wiring left for it so I assume the ECM is looking for it.