1998 Dodge Ram

Engine Performance problem
1998 Dodge Ram 6 cyl Two Wheel Drive Manual 126634 miles

My 98 dodge ram 1500 has this hesitation when I push the peddle to the floor. More noticable going up hill around 60-70mph. I had the fuel system cleaned tune up from plugs to cap and computer test says nothing. Got any clues for me?
November 29, 2008.

Possible Causes of Engine Hesitation on acceleration: Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include: Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

Nov 29, 2008.