when I go to take off the engine seems to lose all power around 3500-4000 rpm. My wide band shows fully lean when this happens. just replaced the spark plugs as they were showing signs of dammage. that didn't fix anything. I was leaning toward the coil getting weak but would like some other oppinions. The car had a complete tune up about 6 months ago. the coil could be the original from the factory for all i know. I check the coil for ohms & it was ok but, I have heard that as they heat up they can break down. this seems like how the cars power lose is happening too. just shortly after startup it will accel good but after a few miles it has the WOT issue