I've replaced the TPS plugs wires fuel filter fuel pressure regulator and cleaned the throttle body. It's still running horrible. Does not want to idle in the morning, it will run for about 10 seconds then die. When I finally take off it will fall on its face and back fire, even if I hold it to the floor it'll do nothing, then all at once it'll accelerate like mad then start back firing and stalling. Could it be the EGR or O2 sensor or both
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sounds like plug wires are crossed.. did you replace the plug wires one at a time?? don't know which engine you have,4.3L,5.0L,5.7L? plugs,cap,rotor button been changed? if not they probably need to be changed.
We really need to know which engine it has .. Yes, it makes a difference! .. You can always just have repair shop fix it, just thought we could offer some help.
