2004 Scion xB transmission automatic roughly 160,000 miles on it. Cranks a good amount that i have heads turning eyes looking like do you need a jump... I know eventually it'll start within 10 sec max is say then engine will start sometimes it shakes to point of almost shutting off I give a good Rev and a perfect running Engine. Completed task all new 1. Fuel pump 2. Gas cap 3. Fuel injectors(4) 4. Lucas fuel injector cleaner on every fill up and pumping 91 only 5. Bay 1 O2 sensor 6. Mass flow sensor.... Every step the car progressed each done separate a day to 3 days back to square one what is most useful is the #4 but till I get a qrtr under the full tank it starts slowly get the cranks back again sq 1... Is it possible crankshaft sensor? Thanks in advance