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My Mounty has 3 Cats in one. It is Y shaped with a left and right bank cat and then joins downstream to a single cat and out the tail pipe.. It comes as a whole unit. Maybe your Explorer is a Calif. emissions style car ?

I have the P0420 code displaying on my 03 Mounty. I need to replace the converter assembly. It doesn't look to hard to do other than taking a crossmember out. Any suggestions on where and what brand to buy it ? I looked at Rock Auto...cost $500. Thanks Chuck

I have the P0420 code, degraded right bank converter. I have looked at Rock Auto for a new converter...Eastern Cataltic for $540. Any thoughts on what to buy and according to my manual doesn't look all that hard, other than taking out a crossmember ?? I have 185,000 miles. Thanks Chuck

Thanks Rondo I did some more research and found this to be a common problem with the explorer and mountaineer. It is a fault in the instrument cluster. I disconnected the battery for 20 minutes and let the system reset its self. That cured the problem and everything is okay now. But if this...

I have a 03 Mounty. I found my car battery dead as a result from the driver door being not fully closed and the car not being driven for a week. I used a battery charger set on 225 amp engine start to get the car started. The car started up but then I noticed my all my instrument gauges did not...

I have a 03 Mounty. I can't get any air flow control to work I when I use my selector buttons on the control panel. I can hear the vacuum control box click when I cycle between various selections. I have disconnected the vacuum actuator from the center distribution box door to secure the door to...

I have a 03 mountaineer. I am not getting any air flow from my vents. The blower works fine, ac is fine and heat is ok. I looked at the fresh air door and it is in place and works normal when I use a screwdriver to push it open and it closes fine. Next I found the blend door and its actuator. It...

No I wasn't changing the coil wires due to the 420 code. The car misses and runs rough at times so I thought it was time to change out the wires. I have 160,000 miles on it. Think I will pull out the o2 sensors and have a look at them.

I have a code 420 on my 03 awd mounty. Which reads right bank catalyst system bad. I want to replace all my ignition coil wires...anybody have thoughts on what to replace with ? OEM,Bosch ? Would changing a 02 sensor be cheaper than replacing the whole cat system ? Thanks Chuck

Lug nuts should be torqued to 100 ft lbs. I have replaced all my wheel bearings. I took my rear hub assemblies to the Ford dealer and they pressed out the old and pressed in the new for $80. Maybe your tires are out of balance ?

Stelvio I replaced my rear wheel bearings in Oct. That cured all the road and tire noise. I always thought the Mounty AWD is full time. Now I could be wrong but the car is always in AWD mode. Thats why my gas mileage suffers alittle. I have also been told that the AWD doesn't engage until the...

I think I will do what the manual says. Since I am changing the thermostat, I will take out the thermostat reinstall the housing and then disconnect the upper rad. hose at the radiator and put the water hose in the radiator to back flush. The hoses have never been changed and I have 160,000...

I want to splice in a tee fitting so I can hook up a water hose to back flush my coolant system. Does anybody know which hose to splice into ?? I would think it would be a return line to the radiator ? Thanks Chuck

I have always spliced a water hose fitting into the return line on my other vehicles. That way you have constant water flow all the time. I use the Prestone flush kit.

I guess my old way of thinking is that these are OEM. Which makes them 9 yrs. and 158,000 miles. What you are saying is todays hoses last a long time ?

I have a 03 AWD Mounty with 158,000 miles. Never had the front end algined or the transfer case fluid changed. Have been meaning to do both but haven't. You got me thinking I should do it soon !! Thanks Chuck

I am going to flush my coolant system on 03 4.6 mounty. I will replace all hoses and replace thermostat as well, as I haven't done this since I bought it in 05. I plan on using the backflush method by hooking up a garden hose. Will pour in Peak clean and flush additive. I have done this a few...

I know, but no bad sounds out of the rear bearings yet. When I do replace them I will take them off and then take them to the Ford dealer to have the old bearings pressed out and new ones pressed in.

I have a 03 awd v8 mounty. It has 157,000 miles on it. Sounds like the front wheel hub bearings are going bad. What I have read is this usually happens around 140,000 miles. I replaced mine this past summer, not a bad job. The new bearings cost me $240 from Rock Auto Parts, they were Timken...

I have taken the ebrake shoes out, didn't help. That's when I found my coil spring was broken. I recently replaced with new calipers and slider pins, guess I will just clean everything up and re-lube pins.

I just replaced my rear struts on 03 Mounty. I got them from NAPA with the Monroe part number 171322,made in the USA. $180 each with $50 rebate. I removed the stabilzer bar and compressed the springs to make it easier to get out. The right rear coil spring was broken, to be expected. Yes, the...

Got check engine soon light on drive from Tenn. The Mountaineer started running alittle rough. Got home and went to Autozone for code readout. P0301 is #1 cylinder misfiring. P2195 is sensor bank fault.He told me to check for a break in the vacumn lines. Any thoughts here ?? I have a 03 with a...

I have a 03 awd v8 mtneer. Noise coming from rear of car. Just got the tires balanced and rotated thinking it might be the tires, all tires good. Its not a grinding sound, something more like being out of round sound. Went to the ford dealer and asked him if it might be the rear bearings. First...

I have a 03 v8 awd Mountaineer. Getting a noise from the front that sounds like something is out of round. Hard to describe it. The noise gets higher as you increase speed, you can feel it in the steering wheel, and more when you make turns. I replaced the front wheel hubs 4 months ago. Could it...

cupped tires Had the same problem with my 03 mountaineer . I had changed the front wheel bearings and got a loud noise like the bearings were bad. Took it to Discount Tire for a tire rotation and they told me I had cupped tires from the bad bearings that I just replaced. Well after the rotation...