I have a 98 eddie bauer with the 4.0 that has some problems that seem to be getting worse. It is missing badly. It misses idling, under acceleration, and pretty much any other time. Also has no power whatsoever under acceleration. It takes me forever to get up to highway speeds. I hooked up a scanner and got several codes. Misfire detected bank one(duh), misfire detected bank 2(really?), system too lean, and calalyst efficiecy below threshold. What the heck does that last one mean. I have done all the routine stuff like new plugs and wires, new filters, and cleaning idle valves and such. Nothing has helped. it has 160k miles on it. I am imagining o2 sensors would help, but would like to know for sure before I shell out all that money. Is there a way to test the sensors? Any ideas? Thanks

 

One of two things. Coil pack has gone bad or the cam shaft position sensor is bad. I have code reads of 4,5 and 6 are miss firing along with too lean on gas.

 

good day to all .if the problem is under load then change the cam position sensor .
if you need have plenty of them $100.00 + shiping p/s weve been parting explorer's expedtion's & navigator's for 10 years 818-767-0316 or fax 818-767-0346
or email @ rainbowauto@sbcglobal.net mike or john