Hey guys,
I have a 2001 IS300 with about 185,000 miles. Recently, I have started having issues with acceleration. First thing in the morning when I start the car, it drives great and normal. Then after about 25-30 mins, the engine noticably bogs down, and when I push down the accelerator, the cars does not react. I have to push the pedal all the way to the floorborad in order for the car to move. Also when this happens, the RPM"S shoot up to around 1500 when in Neutral. I changed the O2 sensor as I wire had come loose, but that did not fix the problem. The check engine and trac lights are also on; the code i get for the check engine light is P1120. I have cleaned the MAF and throttle body, and no results. Any thoughts???
Thanks for your help!!!