caleb peters

Hey guys...

Well I have a 93 Jeep Grand Cherokee with 4.0l i6 engine, great engine I love it but, there's an issue I've been battling for a good 2 weeks now. She sputters...

I've replaced the tps thinking that would be it, cleaned the IAC valve and that made it worse!!

So I pulled the codes and holy cow there's more than I thought and multiples too.

Codes:

12 - Memory to controller cleared
51 - Air/Fuel at limit O2 sensor signal input indicates lean Air/Fuel while running
21 - O2 sensor niether rich nor lean detected
13 - MAP sensor pneumatic signal - No variation in MAP signal detected
24 - Throttle Position Sensor voltage too high/low
21 - O2 sensor niether rich nor lean
14 - MAP voltage too high/low
34 - Speed control servo solenoids or MUX speed control curcuit
55 - End

I'm totally confused guys please help.

The jeep will totally kill out on me on the highway and voltage falls dramatically.