You guys are going to think I'm nuts after posting this... Oh well here we go. I picked up a '05 R53 with 80k miles. Good running car but petty drastic oil pan leak. I R&R the oil pan gasket and while there changed crank sensor gasket and a leaking thermostat gasket. It was a chore! Ugh. New oil, 5w30 royal purple. Refreshed coolant. I went to start the car and not good! It starts but really rough, no pedal, no oil pressure, and low, almost stalling engine! Even with pedal on the floor. WTH?? Plan to recheck my connections again but looking for guidance or similar experiences. On my mind at the moment :idea:, maybe in order of hope :fingerscrossed: 1. It's cold, battery (and car) need to run for a few... 2. It's not leaking oil, so oil gasket replacement ok. I've read others resetting CEL which I didn't do. Does that matter? 3. Air and fuel mix. I did clean air filter maybe it's restrictive with PJ1. I've used this before on foam air filters. I'll pull that off and see if that helps. Additionally recheck the fuel bits that needed to be disconnected to remove serpentine belt. Maybe another vacuum hose some where? 4. I screwed up the crankshaft sensor when R&R? That would suck! But ok. Agains thanks for any guidance. I post updates later.