Jeep in question is my 2000 XJ. 4.0, Aw4. 95,000 miles
On the way back from Seattle today, I drove down a washboard road for about
7 miles, got gas and went to get back on the highway. Less than one mile
after fueling, I get a CEL. Pull over, gas cap is tight, everything looks
OK. Continue around 100 miles home, CEL solid the entire way. Fuel near
home, 15.5MPG! I had previously gotten 21.1, 18.9, 20.1.
Stop at CSK, pull the codes, and I get P0303. Cylinder number 3 misfire.
Plugs are new copper champ's, Throttle body was recently removed and
cleaned. Any ideas where to start looking?
Also, I'm planning on changing the coolant soon. I have heard I can get the
prestone heater hose tee, and flush it with a garden hose. Then drain the
radiator thru the lower hose, fill the radiator with distilled water. Drain
again, and refill with 100% coolant. Will this give me the right mixture?
- posted 13 years ago