My Toyota Celica GT 2002 is hesitating to accelerate.

shaunboy

Check engine light is not on, it seems to do it minutes after the engine warms up, engine temp and oil pressure is fine.
Dont think its transmission cause it seems to do it when in park when i give it gas but not as bad.I ran some Lucas fuel treatment through a full tank of gas. Im down to the solutions of it being spark plugs, ignition packs, Oxygen sensor, or fuel filter. any suggestions

shaunboy

shaunboy said:

Check engine light is not on, it seems to do it minutes after the engine warms up, engine temp and oil pressure is fine.
Dont think its transmission cause it seems to do it when in park when i give it gas but not as bad.I ran some Lucas fuel treatment through a full tank of gas. Im down to the solutions of it being spark plugs, ignition packs, Oxygen sensor, or fuel filter. any suggestions

It seems to do hesitate at it medium to low speed acceleration, doesn't seem to effect high speed acceleration

Mr_Shiftright

When was the last tune up?

shaunboy

it has been awhile

Mr_Shiftright

Well I"m not a fan of throwing parts at a problem without methodical diagnosis but a set of spark plugs and new wires is always a good investment--or at least look at the plugs and "read" them. DON'T buy an 02 sensor if you haven't had the car scanned, and codes extracted. You could change the fuel filter, sure, that's just part of regular maintenance.

For a more methodical diagnosis, you'd need to scan the car and also read the fuel pressure at the fuel rail.

CAPTAINSOLO

Looks like a dirty or defective Mas Airflow Sensor on top of the air intake hose.

Swap in a known-good sensor from another car. All Toyotas and Lexus use the same DENSO MAS.