[hunter4ever12]

I have a 92 K1500 with the 5.0L, to start off I will tell everyone that yes I have performed all "normal" tests and checks on the pickup such as fuel pressure and tested sensors ect ect. and they are all within specifications. Anyway the pickup has 226k mile on it so its not new by any means but it is completely gutless. It has a hard time maintaining speeds of 60mph +. It seems powerless. A little history: the pickup has a rebuilt transmission, and i have replaced several parts such as the TPS, Coolant sensor, fuel pump, thermostat, cap, rotor, spark plugs, wires, it has no catylatic converter and true dual exaust with glass packs, a rebuilt throttle body, and several other things have been replaced too. After replacing all of those things the problem still exists.

The symptoms I am getting include lack of power, hard starting, hesitation during exceleration, a "dead spot" in my throttle response, as well as rough idle(when i say rough idle i mean during driving when you excelerate then let off of it it chugs a couple of times then idles back out smooth). It also has low oil pressure and this problem just arose its not so low that its dangerous but it is lower than normal. Also even after replacing the thermostat and coolant temp sensor the gauge in the pickup acts wierd. It will fluctuate between the 1/4 and 1/2 mark constantly.

I am at a loss here of why my pickup could be acting the way it is. I know the 305 doesnt have the power a 350 does but it still shouldnt be as gutless as it is. Any ideas as to what the actual problem could possibly be?