I have a 98 Camaro that spits and sputters upon acceleration and also when the engine is bogging. Engine codes have been checked and it is still reading Lean Bank 1 & 2 and multiple misfire. It is automatic so when I pull it back down into drive from overdrive and let off of the fuel it seams to help a little. I have had this car in the shop and spent over a $1,000 on it this year trying to get the problems solved and it is still not fixed... I have put a FPR, Fuel Pump, O2 Sensors, Mass Air Flow Sensor, Plugs and Plug Wires. Does anyone have any idea where I can go from here?

 

try some injector cleaner in the fuel. check the iac valve, throttle postion sensor, egr, thats all i can think of.

 

vacuum leak
failing egr
clogged exhaust
too rich
too lean
cracked or broken spark plug insulator
plug wire not really on all the way
bad coil(s)

the list could continue

if you have $1k invested for this exact problem, and don't have it pinpointed, and paid a mechanic, bring it back and at least ask them to isolate the problem area.