I dropped the exhaust pipes at the manifold. They will only fall about an inch but that's enough to 'see' the exhaust coming out. Start the car, let it warm, not a puff of balck smoke to be seen!! I hook up my DVMs. EHA is 20ma KOIO. Start car. Duty cycle varying continuosly between 47 and 52%. EHA steady at 3.6 with O2 sensor unplugged and near zero connected . Still not a puff of smoke of ANY kind to be seen, even when revved to 4000 rpm. Damn that thing's LOUD at 4000 rpm.:p

So, plugged exhaust making it run rich???