I have a 2002 avalanche 1500 4x4 5.3L
I was driving one day and got gas, the truck had no power for take of or go above 15mph. About 3 mins driving the truck started to operate normal, this was 3wks ago. Now the truck will idle for 5-10mins, then stall or act as if flooding out. After turn key off then try to start again 2mins of sitting the truck wont start as if no gas, it has gas and pressure is fine it seems. If the truck sits for 1-2hrs then try to start it starts normal then repeats the stall phase. I removed the air box, leaving the MAF sensor connected in place as normal operation. I start the truck and you hear a large constant air being pulled in through the internal ports of the throttle body. This is where the IAC (Idle Air Control Valve) connects to. I have replaced the PCV valve and hose, throttle position sensor, cleaned the throttle body, replaced the throttle body gasket, replaced vacuum lines that I have found and still same problem. The air constant sound is coming from the throttle body, the truck never had this loud sound of air being pulled in before the initial problems.
I have x2 codes pulled and they are P0171 and P0174.
have the same problem?
Sunday, June 8th, 2014 AT 1:59 PM