engine hesitates when warmed up

[Tyler]

lets see... my mom has a 2000 3.8 automatic.

we have changed the cat, the fuel filter, and the air filter. what happens is when the engine gets warmed up it hesitates really bad throughout the whole RPM range.

now usually if this were a misfire you would geta blinking code for continuous misfire.. but it isnt doing this. sometimes when you drive... and then have to stop at a redlight. the car will die.

what can cause these symptoms?

[i_love_my_maro]

i woudl say fuel filter but you already changed that

[Tyler]

i need a list of things that it could be?


could it be the o2 sensors or MAF sensor?


this is ONLY when engine is warm. when you first start it in the morning.. NOTHING is wrong.. but about 15 min of driving it does this bad

[Jayy]

dirty injectors?
check all your plug wires.
i had the same problem and it turns out i had burnt up 2 of my wires. it didn't give me a SES light

clean the tb and maf