fuel problem

[95sunfire]

i have a 95 sunfire with 13100 miles. lately it has been bogging down and hesitating alot on take off and sometimes sputtering right when i start it. i have found though if i take off from a stop very slowly picking up speed and not hitting the gas hard that it wont sputter and hesitate. i changed the fuel filter and added some cleaner to the tank and that didnt work so i took it to a mechaninc and he said he couldnt find anything wrong with it. i changed the fuel pump a few years ago when it went out but i dont remember it acting like this last time it went out. i just wondered if my pump is bad again or if my injectors are bad. once i get up to a constant speed it is usually fine.

[slappy180]

u need to get a full servise maintance tun-up.the cleaner u put in the tank cleans your injectors put it moves the gunk into your engine.put u need a tun-up bad

[noize1er]

bad fuel injectors. or the throttle body. yah and, tune up

[Slade901]

Three things I want you to check.

1. Take out your IAC (Idle Air Control solenoid) which is located on the throttle body. Clean it with a throttle body cleaner and a brush. Clean the spot where the IAC goes in to the throttle body.
If that does not work you may have to replace the IAC $29.

2. The TPS (Throttle Position Sensor) also causes problem which is located below the IAC. The TPS at IDLE provides voltage value to the computer and that's what how computer determine the position of the throttle plate. If there is a dead spot on the TPS providing incorrect voltage then it will throw the computer a little bit. The TPS can't be cleaned and you just have to replace it $19.

3. The MAF (Mass Air Flow sensor usually located right after the air filter box) or ACT (Air Charge Temperature sensor usually located on the side of the air filter box). Try cleaning them with some throttle body cleaner and let it dry.

Check the connectors as well of all sensors.

[Flatrater]

Slade got the right idea.