Hey guys! Need your help.
1993 FJZ80 - 275k Miles
Until recently no issues until about a month ago, truck started rough idle, loss of power, and sputtering while cruising. After reading through the forum, I thoroughly cleaned the TB and MAF sensor, cleaned EGR, put it all back together, and checked and inspected for vacuum leaks. None found. I also changed the fuel strainer. There was no improvement. Not having a lot of free time right now and not sure where to go with it next, rather than throw random parts at it, I took it to a mechanic.
Mechanic changed all the spark plugs, (said the back three looked bad and wet) and they also took apart the throttle body for another thorough cleaning, replaced the TB gasket which I had apparently bent, and replaced the water pump which was unrelated. Truck idled MUCH smoother, symptoms improved a bit. BUT took it out on the highway and it sputters/misses (not sure which) around 60-65MPH/sustained 2200-2500 RPM and check engine light comes on. ( checked codes 25, 26, 52 = lean/rich/knock) Always starts easy, drives, but lacks power and sputters at those highway speeds.
What next? O2 sensors, fuel pump, cap and rotor, ignition, I don't know what to try next. Thanks in advance!!
1993 FJZ80 - 275k Miles
Until recently no issues until about a month ago, truck started rough idle, loss of power, and sputtering while cruising. After reading through the forum, I thoroughly cleaned the TB and MAF sensor, cleaned EGR, put it all back together, and checked and inspected for vacuum leaks. None found. I also changed the fuel strainer. There was no improvement. Not having a lot of free time right now and not sure where to go with it next, rather than throw random parts at it, I took it to a mechanic.
Mechanic changed all the spark plugs, (said the back three looked bad and wet) and they also took apart the throttle body for another thorough cleaning, replaced the TB gasket which I had apparently bent, and replaced the water pump which was unrelated. Truck idled MUCH smoother, symptoms improved a bit. BUT took it out on the highway and it sputters/misses (not sure which) around 60-65MPH/sustained 2200-2500 RPM and check engine light comes on. ( checked codes 25, 26, 52 = lean/rich/knock) Always starts easy, drives, but lacks power and sputters at those highway speeds.
What next? O2 sensors, fuel pump, cap and rotor, ignition, I don't know what to try next. Thanks in advance!!