Tuffy Tire & Auto Service Center - Grandview
1524 W 5th Ave
Columbus, OH
Open
Closes 5:00 PM
Excite Auto Repair & Towing
3430 Westerville Road
Columbus, OH
Open
Closes 6:00 PM
All In Auto Service
5200 Fisher Road
Columbus, OH
Open
Closes 6:00 PM
What is your question?
·
·
What is your question?
BEFORE A COUPLE OF WEEKS OF COLD DAYS THE CAR WOULD START UP IT ALSO STARTED UP WHILE IT WAS COLD OUT SIDE TWO ARE THREE TIMES. THE NEXT DAY I TRYED TO START IT UP IT DID NOTHING BUT CRANK BUT NO START.I CHECK PLUGS AND COILS NEITHER ARE FIRING, THEY ARE NEW. WHAT ARE CAUSING THESE PROBLEMS ?
How long has your 2002 BMW 745i had this problem?
about three months
1 Reply
Hello, Firing of the coils is done by the powertrain control module, but knowing the 7 series, there is likely an intermediate controller or two between the powertrain control module and the coils. To save time, I'll just tell you that the 7 series was never intended to be serviced without factory diagnostic software and training. It is really a phenomenal waste of time to attempt diagnosing advanced issues at home, or even with an insufficiently trained professional. I'm not saying they are made of magic, but I am saying to consider what your time is worth on diagnosing this vehicle, do what you know how, and then send it to a independent BMW specialist. Check fuses (all), relays, wiring harness, then ship it out if you didn't uncover anything obvious.