i just had a compression test and after the test i put this c-foam or something like that in my motor to clean it out....however; ever since then my car will not go abouve 3500 rpm and the check engine light comes on? if i turn the car off and let it sit for a moment and turn it back on things will be normal again for about a minute then the same od story continues. i have no idea what is going on i have checked everything that i could think of that would be wrong...when the car gets to 35k it bounces like its in a safe mode of something. any ideas would be great. thanks alot.