1992 318i...trouble starting
hello, i am new to the site and am in need of some guidance on troubleshooting my car's problem. i have a 1992 bmw 318i (e30, 152,000 miles). lately i have had some issues starting the car, CEL comes and the fault is 1215 for air mass sensor. i have virtually all new hoses, air boot, and idle control valve less than 15,000 miles old. i check for possible leaks in any of the hoses around air mass, throttle body and fuel filter but dont find anything catastrophic, being that they are relatively new. next, i purchase a used air mass sensor, replace it, unplug battery to reset fault codes, and same problem exits, but now no fault code appears, just still having problems starting. it doesnt happen all the time though, if i let the car sit over night it seems to start fine in the morning, but after running the car for say 30 mins (no issues while car runs) and then kill the engine to test start, the car just doesnt want to start.
sorry for the brief novel above but i figured i would preface the situation. any help would be much appreciated.