I have a 92 XJ Limited, 4.0L, AW4 Trans. Recently I have been having a problem when trying to accelerate. From a stop, there is not much trouble as long as acceleration is slow and gradual. If I am getting on the highway, as soon as the trans down shifts, the engine starts to sputter and backfire through the throttle body. If I floor it, it downshifts to 2nd gear and takes off.
I have replaced the fuel filter, cleaned the K&N air filter, replaced plugs, wires, cap & rotor to no effect. When I pull the ECM codes, all I get is 55 which I believe is the check code for "beginning of codes" or "end of codes".
Can this be caused by a plugged catalytic converter? Or is my XJ just possessed?
I have replaced the fuel filter, cleaned the K&N air filter, replaced plugs, wires, cap & rotor to no effect. When I pull the ECM codes, all I get is 55 which I believe is the check code for "beginning of codes" or "end of codes".
Can this be caused by a plugged catalytic converter? Or is my XJ just possessed?