Well here is whats going on, When I take off, I press on the throttle it sounds like its going to stall. Once going it runs great. But when I am coming to a stop and once i slowly let off the throttle it starts acting up like its going to stall. If i idle out and pick up a little speed and then press the throttle it dont wanna hesitate. If I quickly let off the throttle coming up to a stop sign it quickly goes to idle instead of hesitating. So I have changed the spark plugs, plug wires, cap & rotor, fuel filter. I have sprayed carb cleaner all around the intake to see if it was leaking. No leaks. I have checked all the hoses and they are all good. Looked at the fuel injecters as I reved it up and they seem to be spraying evenly. One thing I did notice is that there is a clicking sound coming from the injector area that I didnt hear before. I have taken the throttle position sensor and it turns fine. I have taken the Idle control valve out and cleaned it up. What am I missing. It has no codes. The engine light has never came on. Im stumped since the engine light never came on and there are no codes.
What about the fuel pressure, have you monitored the fuel pressure. How about the MAP sensor, have you recorded the siganl when this happens and the O2 sensoras what are they doing when this happens. You have little testing just throwing parts at it from what i can see. Tinme to give a professional a chance here if you ask me.
SOURCE: 1994 gmc seirra k1500 4.3 engine 4x4 hesitation
Possible erratic signal from the crank sensor
320 views
Usually answered in minutes!
×