i have a 1999 silverado with a 4.8 in it. it had a realy bad starting problem the starter will turn over but it take like 3 or 4 sec of cranking to get it started it has worsened as time has went on. when i first got the truck it did it every once in a while its still starts it just take a long time now it dose it all the time ive changed the fuel filter and run cleaner throught it and checked the fuel pressure and it was fine idk what 2 do plz help

 

Just a couple ideas you can try, but make sure your plugs and wires are in good shape if it still has the original wires change them regardless of miles. Another thing could be dirty injectors,but thats i bit more involved.

 

well when i first bought the truck it had 120 000 miles on it and i took it to a dealer and had them change the plugs and do some recall work so idk think i was that bc they look pretty good

 

ok well if your not getting an engine light from a sensor then id look into getting the injectors cleaned. The cleaners that go in the tank wont get rid of rust and other deposits completely

 

how would i do that just take them out and wipe them off or what

 

no they under the top half of the intake or plenum. if you have never taken them apart then try to get someone to help who has. you have to take the plenum off and and pull the fuel rail. the injectors have a screen on the side the rail clips onto them and thats what needs cleaned. you can use a real small flat tip screwdriver and a can of carb cleaner. The only other thing i can think of to check is to see if maybe the module or relay for the fuel pump is lazy or slow to respond when you turn the key on.Im not the best with the electrical end. but the right shop can checkall that with and ohm meter.

 

are you driving short distances, whats the voltage on your battery?