Thank you in advance for all help and sorry of I give too much info - just trying to be thorough.
2004 - 4.0 - 5 speed - new to me - 167K on Jeep - 8K on new engine (why i bought it) Tranny needs rebuilt - front bearing going bad, but rest of jeep rust free and cosmetically OK. Engine over heated and killed first engine- PO replaced - have paperwork and stickers still on block and head
Knew it had a power issue when I bought it. Loss of power at highway speeds. Have to drop a gear even for small hills.
Threw code P0306 - misfire in #6 - after a bit began running rough enough the miss was noticeable.
What I have done/checked.:
Ran Cataclean through - 2x's
Checked temp of cat and pre-cats - none are hotter than surrounding pipes or muffler
New plugs
Replaced coil rail
All injectors sound the same - stethoscope
Since engine had been out/replaced - tomorrow is cleaning all grounds and trying to see if any are missing - may post separate help ? for this - service manual not much help. Need to make sure there are not missing grounds
Sunday is checking injectors with multimeter
No Schrader valve to check fuel pressure???? Is there a way?
Any other suggestions are welcome and thank you,
Not a mechanic, but I keep a 70 chevy 4x4 truck running. The new fangled stuff I am not so good at - still wanting a carb on this thing..... My 2nd 04 and this one I will keep. I need to learn how to work on it myself.
thanks again
2004 - 4.0 - 5 speed - new to me - 167K on Jeep - 8K on new engine (why i bought it) Tranny needs rebuilt - front bearing going bad, but rest of jeep rust free and cosmetically OK. Engine over heated and killed first engine- PO replaced - have paperwork and stickers still on block and head
Knew it had a power issue when I bought it. Loss of power at highway speeds. Have to drop a gear even for small hills.
Threw code P0306 - misfire in #6 - after a bit began running rough enough the miss was noticeable.
What I have done/checked.:
Ran Cataclean through - 2x's
Checked temp of cat and pre-cats - none are hotter than surrounding pipes or muffler
New plugs
Replaced coil rail
All injectors sound the same - stethoscope
Since engine had been out/replaced - tomorrow is cleaning all grounds and trying to see if any are missing - may post separate help ? for this - service manual not much help. Need to make sure there are not missing grounds
Sunday is checking injectors with multimeter
No Schrader valve to check fuel pressure???? Is there a way?
Any other suggestions are welcome and thank you,
Not a mechanic, but I keep a 70 chevy 4x4 truck running. The new fangled stuff I am not so good at - still wanting a carb on this thing..... My 2nd 04 and this one I will keep. I need to learn how to work on it myself.
thanks again