I have a 2005 Aveo, 102,000km. I just had my head replaced after my idler grenaded. The car drove great for the first week but now I am losing power when I start to accelerate. It does it at about 10% throttle, if i give it more gas it starts to run normal. The problem is intermittent. Sometimes it does it when the car is cold, sometimes only when it warm and its always worst when i accelerate from a stop. if i am cruising down the highway and gently press the pedal i only feel slight hiccups.
Mechanic replaced the timing belt, pulleys, checked EGR wasn't stuck, replaced the TPS, compression test was perfect, fuel pressure test was perfect....anyone have a similar problem or any ideas?