Hesitation and popping in exhaust

[huesmann]

I have a '98 GT, stock aside from a cat-back. I'm getting this engine hesitation and these popping noises in the exhaust under acceleration, mostly when I'm under about 1500 rpm, any gear. It happens less frequently when I'm accelerating gently, and happens often when I floor it. But when it gets over 1500-1700 rpm or so, the problem goes away. The MIL light doesn't come on at all. Any ideas?

 

[jc315]

I'm wondering the same thing mine does it at the same rpm's. Its fine all the way through until I hit those same ranges as yours. Hopefully someone has had this problem and fixed it.

 

[98laseredgt]

mine does it too. i changed the plugs and the wires are newer, changed the air filter, pcv valve, and started using premium gas, but its still there. i cant figure it out. anyone know what it is?

 

[huesmann]

You're not throwing codes either, are you?

Might it be the fuel filter?

 

[98laseredgt]

my car is throwing a code for the mils. i have an O/R H and no eliminators. im going to go to autozone now and see if they can pull it and maybe there is something else that its throwing, but i cant see because the light is already on all the time. im going to change the fuel filter later ill let you guys know if it helps.

 

[huesmann]

^

 

[Grady96GT]

Fuel Pump
85 bucks at autozone
In tank=PITA

 

[jc315]

so you guys think its a fuel pump issue? I have an 03 with only 10k on it and just the basic bolt on's headers,plenum,chip,o/r H I shouldn't be pushing the pump that hard should I?

 

[jc315]

tt

 

[98laseredgt]

my codes were for the downstream O2's. nothing else. havent changed the filter yet. if that doesent help i guess ill have to look into the pump.

 

[huesmann]

laser, did you have the MILs on constantly?