Lboggie

Hey I have a 2000 Gs 300 it runs great it has 155k on the dash.i recently ran in to a problem with the loss of power....I've had all the the service done possible on it even went in the tank an change the the gas pump filter..any way I changed the the 02 sesors an one cat went bad I just changed booth of them had a big whole in the honey cone....now I my getting more power than before but i can't hit it when I'm on the interstate will hesitate when I get to a bridge it's just like it's still clogged an here a leak from the exsust I didn't here before almost like hissing....the engine is not missing no idol problems at all just not getting proper power can some one please help me figure this out....!!!

mulasien

Have you changed your air filter recently?

Lboggie

I've changed it all....but the maf I cleaned it an it works fine....full tune up...I spent almost 3000 last year on the car mostly 02s an plugs wires coil pack ect......

marshun

ok, aside from having to decode this (is english your first language?) i got a possible solution

have you checked your intake to make sure its sealed up right? i just redid my intake and forgot to strap the clamps and i had a hesitation in power.

Lboggie

My macanic went back over it an the Gs300 has 3 cats it's in the y shape of the exsust ...the third one was clogged as well....clean that bad boy out an it's back like brand new money....No problems at all!!!

robracer77

Check for vacuum leaks! I changed plugs coil packs, and two sensors, still had problem. Finally took it in and it was a vacuum leak at the hose between the air cleaner and the throttle body which there is also a sensor. I noticed on the bottom of the box there was a crack/hole, so I covered it up with silver tape. That did not work. I was very close to fixing the problem myself, just that one thing I ignored. Runs better than it ever did. I love my GS 300

2003