Hey guys. I have a 2013 Toyota Prius gen3. I had a fuel/air ratio imbalance light come on along with cylinder 4 misfire. I was shuddering pretty violently at 45 mph and about 65 mph on deceleration. Since then I have gotten a tune up and a new O2 sensor. It is not shuddering as bad as before but still shuddering nonetheless. No change in coolant level and my oil isn’t milky. Where should I go from here? I am hoping it is nothing serious I have paid already $600 on this issue. Any input helps!
Find a way to test the injector for #3. An injector balance test is one method to try. But on this engine it is probably easier (and quicker) to swap the #3 injector with #4 and see if the fault follows. If that does not solve the issue, do a leakdown test on cyl#3.
Old thread.....but in the absence of any trouble lights and codes, I think it would be prudent to check the tires and wheel first. Could be just loose lugnuts.
