My 2003 Liberty 4x4 3.7L is intermittently setting code P0420, cat efficiency low on bank 1. 2003 Liberty's changed cat setup effective 2/14/03.
My Liberty was built in June 2003 and has the driver side cat welded into the crossover pipe with the passenger cat bolted onto the crossover...
Proceeding
Correcting bad coils and plugs must be done. However zero compression on one cylinder is your most pressing problem. Why? Is the head gasket blown? Is one of the rocker arms or lash adjusters causing a valve on the middle passenger side cylinder to be held slightly open? Pull...
Questions
1) When you say the "middle exhaust valve guide is gone" do you mean missing entirely or worn badly to give excessive clearance with valve stem? If missing entirely, where did it go? If one breaks apart, it would usually cause damage to the top of the piston. If the valve guide...
Suggestion...
Just re-read your original post. You say you took out the lash adjusters and cleaned them. Did you prime them in clean oil? If so, one or more may be stuck on maximum lift causing some valves to remain slightly open thereby losing compression. Had this happen once on a Chevy...
Assumptions...
I would not assume the head is cracked. Try to remove the cam gear and head without damaging the head any farther. I have often found that my assumptions as to what was defective proved wrong when getting the engine torn apart. I would remove the head and then decide how to...
Light replacement
Not difficult to do but must follow sequence. 1. remove driver side pull handle (pull plastic plugs & 2 torx or 2 7mm screws), 2. remove two snap in rectangular trim pieces (one on each side of column) at bottom of instrument bezel, 3. pull up on 40" wide trim panel under...
Hmmm......
Clunking sound? As suggested pull your valve covers to determine if a rocker arm has come out from under one of the cams. This can make a noise if the rocker arm flops around in the valve cover and then make the engine act like it skipped timing. Rocker arm tensioners can leak...
Chip removal
There is a video on You Tube on how to split open the transponder key and removing the chip. Search for how to remove immobilizer chip. It is straight forward - just split the seam of the grey plastic with a razor blade to expose the chip and remove it. The video showed people...
Reasons...
My Libby was neglected and abused when I got her so the need to refurbish. But she is just how I would have ordered her. Black with slate grey interior, Limited Edition with cloth interior and no sun roof. I looked at many KJ's before making a selection and chose Libby even...
When I got Libby with 174k, her cloth seats were in good condition but dirty. The leather steering wheel was coming apart, the carpet in the driver's well was badly worn, and the plastic panels in the cargo area were badly scratched. So off to my pull and save. Found a perfect leather...
End of story.....
Kept getting code P0740 - torque clutch convertor circuit error. Finally concluded the torque converter clutch was shot. Picked up a used tranny from Pennsylvania with 84k miles. When I got it, it had a new torque converter on it and the pan was sealed from the factory...
Your draw could also be through the multifunction switch (turn signal, light switch, fog light). This is common on PT Cruisers 2001-2005 and can drain your battery. Seems the fog light contacts come in touch due to wear and drain the battery. My fog lights started acting weird last week and...
More info
Should have stated 2003 4x4 with 3.7L. Was working on concrete pad in my back yard with Liberty on jack stands. If you have a hoist, would be a much easier job, but I didn't. You will need a transmission jack. Also, clearance for the starter removal and unplugging the 02...
Big job
Just did this last week. Tip: removing starter with exhaust crossover pipe connected not possible on 4x4 - no clearance. So, unbolt crossover pipe & support it (2 bolts muffler, 2 spring loaded bolts passenger side, 1 clamp at exhaust pipe on driver side 10mm nut), slide crossover...
The transfer case shift cable way too much clearance between the cable end and the input pin for the shift arm. It appears there was a bushing in the cable end at one time and it as well as what was holding the cable end on the pin is missing. Does anyone have a picture of the transfer case...
I want to replace the OEM transmission cooler with a larger aftermarket cooler to get better fluid cooling to eliminate Trans Temp warnings. What is the best unit with quality and price in mind? Recommendations from anyone who has done this?
I found a post about a check ball being in the...
Final Report
Well, the jury is in. Replaced both the input and output sensors with new ones and no joy. Still getting the P0740 torque clutch circuit malfunction with the new input sensor. I conclude the torque converter clutch is gone (source of clutch material in original filter) so will...
cluster light bulbs
All the instrument cluster light bulbs are clear glass. I had to resort to the salvage yard as I couldn't find replacements new. Maybe at the dealer.
Check your bulbs
I was so focused on my temp gage light that I failed to notice that one on the speedometer was also burned out. So, I get to do it again. Will find out if my 20 minute estimate is good or not. Elcheapo, yes the bulbs are not standard bulbs that I have seen before. Check...
Instrument cluster bulbs
All the bulbs in my '03 instrument cluster are the same. The tiny wire from the glass bulb is soldered into the socket which has a hex on the back for a 1/4" socket to remove them. Don't know where you would find colored bulbs as the light bulb socket is unlike any I...
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