Getgoing24

when the engine is at normal operating temperature the throttle pedal has a flat spot and the engine sputters like it's starving for fuel. It idles fine and accelerates fine beyond a certain point of the throttle position. it's at cruising speeds on the highway that it acts up. Seems to do it most while trying to climb a grade on the road. Can't keep the pedal at a constant position so using the cruise is useless. Does anyone know what to look for?

JvG

I'd say throttle position sensor.

But the problem while going up hill might indicate fuel pressure issues.

Are you having symtoms of hard starting, or bad mileage, or an unburned fuel smell from the exhaust?

Rit

iTrader: (3)

I would guess that the fuel filter is dirty and needs to be changed.

rodent_infested_03

​​​​​​If it only does this on the highway I'm thinking maybe blocked catalyst. How is the oil consumption? How many miles on the car?

CMax03

iTrader: (3)

TPS....Check and set! Also check Coil packs/spark plugs!

Turbobink

iTrader: (2)

It seems, based on your description that your symptom occurs primarily while the engine is under load:
Based on that, I'm thinking one of 3 things may be causing/contributing.

1. MAF;
2. Air Charge Temp Sensor;
3. Throttle Position Sensor.