Hickey
NAXJA Forum User
- Location
- Magna, Utah
Would a faulty O2 sensor prevent or seriously hinder startup? Would a bad O2 sensor always throw a code?
MY 92 XJ with 4.0 and auto sometimes starts right up with little cranking, but lately, most times it will crank for quite a long time(minutes) finally start, run rough for a few seconds, then quickly smooth out. On accelleration, it will bog and surge. Seems if I keep a steady throttle pressure on a level road, it will run fine.
I can hear the fuel pump when I turn the key on, but not everytime. Once it primes, is there something that tells it to stop pumping? I have already bypassed the Ballast resistor. I have also changed the filter. I can feel the fuel line from the tank to the filter vibrating while it is running, it isn't perfectly smooth, has some slight surging/pressure changes to it when the engine is running.
MY 92 XJ with 4.0 and auto sometimes starts right up with little cranking, but lately, most times it will crank for quite a long time(minutes) finally start, run rough for a few seconds, then quickly smooth out. On accelleration, it will bog and surge. Seems if I keep a steady throttle pressure on a level road, it will run fine.
I can hear the fuel pump when I turn the key on, but not everytime. Once it primes, is there something that tells it to stop pumping? I have already bypassed the Ballast resistor. I have also changed the filter. I can feel the fuel line from the tank to the filter vibrating while it is running, it isn't perfectly smooth, has some slight surging/pressure changes to it when the engine is running.
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