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Discussion Starter #1
~150,000+ miles on it.
It was running fine when the engine light came on. I stopped and pulled the P1148 code (air/fuel ratio) and I thought it might be a loose gas cap. So I tightened the cap and cleared the code.
Got back in, started it, fine. Drove 2 blocks and it started to miss ---- pulled the P0300.
Seemed okay at higher revs so I took it to the dealer (thank you MaxCare).

Anybody else ever have this? Bad fuel rail pressure solenoid?
 

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Might be an 02 sensor.
 

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Might be an 02 sensor.
That's what I thought at first --- but would it cause a miss? And not a bad miss; just at low RPM.
 

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When was the last time you changed plugs? Coils? also seems to me if the A/F is off it could cause a miss fire.
 

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Discussion Starter #5
Plugs were around 60K miles ago. Coils, nope.
 

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I did plugs at 50K and will do plugs and coils at 100K as well as change out the oil cooler. That is if it last to 100K.
 

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Discussion Starter #7
Oil cooler and radiator were both replaced. Fresh coolant at ~90K.

Got a call from Service yesterday afternoon ---- bad valve took out a head. New head is on backorder.
They said if they don't get a ping back from the supply-side I should ping @JeepCares on Tuesday. I've got vacation plans starting Monday June 1 and they involve the Jeep (of course, duh).
 
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