My IS 300 has lost all accerlation. When I step on the gas it just want go . It gets up to spped but very slow. I can not get above 65 on the highway and then I lose all speed going up hills. Anyone every had this problem and if so, how did you fix it. I have already changed spark plugs/wires and fuel filter.

 

anyone have any suggestions

 

auto or manual?

 

It is an auto

 

Have you checked the coil pack? I was experiencing the same problem in my previous Solara (no acceleration).

 

hearing any noises? ticks, rumbles, stuttering?

 

I think its your AFM, but incase you didn't see this, here's a similar problem/fix/how to check.

https://www.clublexus.com/forums/sho...d.php?t=326753

 

no I haven't checked the coil pack yet. I have heard some stuttering. was it your Eng coil pack?

 

i did get a eng check light code P0141. which is for the oygen sensor 2 in bank 1. Which is the powertrain control module for the oxygen sensor heater.

 

did you try what i posted up above?

 

yeah, i tried that and had no luck. still has no power.

 

crashzilla thanks, i re tried what u said. it was my MAF sensor and also my O2 sensor after the cat in bank 1 was bad also. Thanks for all the help. It runs great now.

 

ur welcome scottie!