I have a 1995 k1500 and im needing help with this one.. When i leave the truck in the garage overnight and start it the next morning it runs like crap. i can barely touch the gas pedal and it bogs out, spits and sputters and sounds like it wants to die, sometimes it does and i lose all power.. now when i leave it outside in the cold over night (32 and below temps.) it runs awsome..(sometimes it does this in the cold to tho) Ive tried sea foam in the oil then changing, sea foam in the gas, i tried unplugging the EGR solenoid, now when i do this it runs the same way as it does as if i were to leave it in the garage.. ive replaced the TPS and still nothing.. ive tested the fuel pressure and listened to the fuel pump and it all seems fine and working properly.. also when i put some kind of power draw on the batter such as putting on my turn signal my oil pump gauge goes all weird, for instance when i put the signal on the gauge bounces back and forfth... could this have something to do with it? and when i drive for a period of time or leave the truck running my check engine light will come on, sometimes it will stay on and sometimes it will turn off within the minute.. and when i turn the truck off, then back on it will turn off...? i need help.. this truck is my daily driver.. and i need it to get to school and work. i have a huge garage and am pretty mechanically inclined.. any info would help thanks! it has a 305 TBI (non vortec)

 

did you pull the codes?it might be the coolant temp sensor since has to do with temp

 

no codes, i can never catch it with the reader when the engine light comes on.