1994 BMW 740 Car stalled when stop at traffic light twice w

BMW740I

MEMBER
1994 BMW 740
V8
2WD
AUTOMATIC
123,200 MILES

Recently just replaced oxygen sensor at car dealer. I replaced the air mass meter myself. A week later, spark plugs replaced. Then the next few days, drove more than 90 miles at highway speeds. On the same day, stopped at traffic light for a minute or two, the egine qipped, all indicators lights showed up on the dashboard. I shifted to park and started the engine immediately. The car ran for whole day with no problem at all.

The following week, drove 10 miles. Slow downhill to traffic light, check engine flashed but the car still ran good. Travel for over 90 miles the same afternoon, came out the parking lot downhill to traffic light, the car quitted with the same problem, Then, I started the car back with no problem. Drove back home for another 75 miles with no incidence.

Do I need to re-do the spark plugs?
Is this the problem with bad battery (6 years old) or need to replace the fuel pump? (Alternaroe and water pump were replaced two months ago)

1 Reply

DOCHAGERTY

MECHANIC
9,601 POSTS

Stop trying to fix the car with a shotgun dude! If there is a problem scan for faults, check baseline items(fuel pressure and delivery, faults stored, maintenance items completed etc.) And keep track of what you did. Be patient and methodical and don't just throw parts at the problem. BTW A six year old battery is not good.