02 malibu bad acceleration after warm up
02 Malibu V6 3100 engine
When the car is cold, it runs really smooth at idle and running.
The shift(1-2, 2-3 and 3-4) usually occurs at 2.2-2.7k rpm; shif is smooth.
However, after the car is warm up, it still idles very good.
But it is very difficult to accelerate and the shift becomes very poor.
The engine can hardly rev to above 2k rpm unless I push the gas pedal very hard. The rpm jumps when the it falls between 2k-3k.
Got misfire code 0302, 0300. I changed the wires, plugs, fuel filters, and clear the code. No more code for half month, but the problems still exist.
What could be possible reason?
One mechanic did a few test, including compression test, and told me the EGR might need replace, but he can't guanrrantee anything.
Could any one help me out? Thanks.
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