I have a issue and can't figure it out!! My problem is while driving at a steady speed and low rpm the engine losses all throttle response while driving. when trying to accelerate the engine almost want to die. when you try to full throttle it the engine almost sounds like it backfires. You can shut the car off and set it for about 30 second and it will restart but if you throttle slowly it will start to do the same thing but if you full throttle it right away is will fix the issue until you start driving again at steady speed low rpm it will loose throttle again. . I have replaced the fuel tank, fuel pump, intake control valve, throttle position sensor, MAF sensor, whole distributor, alternator, MAF power relay, MAF burn off relay, the egr valve has been deleted. please help!!!!