Sorry so long to get back with you......having some computer problems - major ones, so please bear with me as I limp along here.
Well, you can either take it to a muffler shop to check to see if the cat collapsed or disconnect the exhaust where it connects to the exhaust manifold and move it out of the way a little and fire it up.
If it fires right up.........your cat is plugged.
Now the thing that concerns me though is the code you got........if it is running to lean the that can damage your cat............so the lean problem will have to be fixed.
Thanks for the info on the alarm system........as you saw that has caused problems but we can eliminate that one.
Did you ever get a chance to perform a visual inspection of the following. Check vacuum hoses for splits, kinks and proper routing. Check for leaks at throttle body, intake manifold, EGR valve and PCV system. Check PCM grounds for proper connection. Check injector harness connectors for proper installation. That was one of the things to check for that code? Look really good!
Next, I would really like to know what the fuel pressure is. Did you ever get a chance to do that? You do this by: Turn ignition off. Install fuel pressure gauge. Start engine and allow it to idle. Fuel pressure should be 42-55 psi
What about checking the coils - though you changed all of this, please make sure you get a good spark. Disconnect spark plug boot from companion cylinder at ignition coil housing and install a fused jumper wire between ground and spark plug connector at ignition coil housing (1-4 or 2-3). Crank engine and check for spark. Is there a spark present at all cylinders?
Turn ignition off. Remove spark plug boot assemblies from affected coil at IC housing. Connect a DVOM between the secondary ignition coil terminals (spark plug connectors 1-4 or 2-3) at ignition coil housing. Resistance should be 4000-8000 ohms. What is it?
Check the Evaporation canister to see if it is saturated with fuel......
Other things that can cause the vehicle to run rich is your engine coolant sensor, MAP and IAT sensor.
With it getting that hot please really check over your O2 sensor for damage........that would also cause it to run rich but it should have thrown a code.
If you have a digital volt meter I can send you some checks for the ECT and IAT....if you want that let me know and tell me about what the outside air temp would be as the engine should be about that.......
Tuesday, March 10th, 2009 AT 7:47 PM