The check eng. lite is on, giving false reading. It is back firing,but the cad.converter is fine. What else could it be? It is now starting to die out,when you give it gas. I hava keep the car up to date on oil tune up and your basic .
The reason you have that code is because the engine is running rich. I would pull the plugs out and check them also check the plug wires. also when have you changed the fuel filter. check the fuel pressure may have a bad pump.
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Very common symptom for a bad crankshaft position sensor. There is a testing procedure for the sensor, but it can give false readings or good readings while testing with engine off and cold. Usually they fail and give erratic reading when they get hot, but then it is virtually impossible to test. Kind of a catch 22. Replacement is fairly easy. They will sometimes give you a check engine light and subsequent code, but not always. I have had 3 cars do the same thing and it was the sensor each time, so if I were you, I would replace it and see if that helps before assuming there is another ignition or emissions problem.....Did you check your computer for trouble codes? Please reply if you have any and / or if you need instruction for do-it-yourself replacement....Mike
can be a number of things from fuel pump to coil pack but check the egr valve may be starting to go -remove and check for carbon build up if not fully encrusted use a carb/or a carbon cleaning solution to clean and free up valve--most problems give a code but -fuel pump-filter-air filter dont and egr will sometimes set off other sensors but usually doesnt until its to late
there is a section inthe manual that tells you how to prepare the car for emissions test which can take less than 2 hrs without driving 400 miles normally if there still a problem the check eng light will come back on shortly after the preperation. if the eng light comes on in acc position on igition switch and goes off the computer is fine.
weird. usually an intermitent problem like that for are o2 sensor means that your catalytic converter is starting to cause problems but that should only set a code for sensor 2 not both sensors. sorry i cant be more help