Okay, I am dumbfounded. I sent my six cylinder 4.3 with air, 2wd, about 130,000 miles to the mechanic to change this sensor in the steering column. He did and after a week the security light came back on. Albeit, intermittently once again. This morning I woke up and the thing will not start. It would crank, but I would here a subtle backfire in the exhaust when I would try giving it a shot of the pedal. But it would not start. Just crank. Not even a burp. Tonight I came home and it started right up and ran great to the garage! I understand that this sensor in the column senses the voltage for the ignition. It is so intermittently that I cannot figure why this truck has this light coming on or if the intermittent starting problem is related. Some times with or without the light being on it will not start.
There are no other codes coming up. I do not notice any performance changes either when the light is on.
Being that the sensor was just replaced I am thinking that there is something further up the line that has to do with the
sensor performance that is messed up?
I just had a new fuel pump and sending unit put in and a fuel filter because that finally went. But it has been running great until now.
Does anybody have any ideas. It has new plugs, wires, etc? When it runs it runs great. Any help would be greatly appreciated.
Friday, July 6th, 2018 AT 3:10 PM