I have a 2FE converted FJ60. I have been having the hesitation/stutter/and fuel starvation from hell... the truck will run pretty good until about 10-20 minutes of driving. That’s when the hesitation/lack of throttle response/bogging/fuel starvation starts happening most frequently.
Original 2F block with 3FE parts from an 88. It still has functioning smog Equip. Summit Racing fuel pump SUM G3138. I am consistently getting 35-40 PSI whether hot or cold. Fuel filters have been replaced. Truck has been run without a gas cap to see if vapor lock could be happening. The fuel pressure regulator has been replaced. EGR valve has been cleaned. Vacuum lines were sprayed with brakleen and no fluctuations have been heard or found. O2 sensors were checked and found to be functional. Spark plug wire were checked. Distributor was checked and was tight. I have checked as many grounds as I can possibly find, all seems to be clean and tight.
I am completely at a loss at where to go from here. Any help would be appreciated.
Logan
Original 2F block with 3FE parts from an 88. It still has functioning smog Equip. Summit Racing fuel pump SUM G3138. I am consistently getting 35-40 PSI whether hot or cold. Fuel filters have been replaced. Truck has been run without a gas cap to see if vapor lock could be happening. The fuel pressure regulator has been replaced. EGR valve has been cleaned. Vacuum lines were sprayed with brakleen and no fluctuations have been heard or found. O2 sensors were checked and found to be functional. Spark plug wire were checked. Distributor was checked and was tight. I have checked as many grounds as I can possibly find, all seems to be clean and tight.
I am completely at a loss at where to go from here. Any help would be appreciated.
Logan