SPONSORED LINKS

1981 Other BMW Models No Spark

Tiny
PETER1
  • MEMBER
  • 1981 BMW
Electrical problem
1981 Other BMW Models 6 cyl Two Wheel Drive Automatic 360K miles

Car is a 1981- 733i sedan with 3210 cm motor.
From handbook Electrical system is Digital motor electronics (Motronic) (uses L- jetronic fuel injection and transistorized coil ignition)
Parked car after full service (included tappet adjustment / resetting). Odessy battery with issolation switch fitted and used. Left for about a month then it would not start. No spark at spark plug. DME relay (Bosch) replaced but still no spark. Any idea what could be checked before towing car 40 miles to service centre?
SPONSORED LINKS
Monday, December 17th, 2007 AT 4:42 AM

3 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Check for power when key is on at the coil. This sounds like a loose wire issue. The early motronic is very robust and I would spend some time with it before sending it to someone who may or may not know the older cars as well as us olde timers.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, December 18th, 2007 AT 11:12 PM
Tiny
PETER1
  • MEMBER
  • 2 POSTS
Dr Hagerty, thank you for your response. The problem turned out to be the failure of the Reference mark sensor that reacts to the pin that protrudes from the flywheel ring gear. Regards Peter1
Was this
answer
helpful?
Yes
No
Thursday, December 20th, 2007 AT 1:50 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Good eye Peter, keep in touch and happy holidays mate
Was this
answer
helpful?
Yes
No
Tuesday, December 25th, 2007 AT 1:38 PM

Please login or register to post a reply.

Related No Spark Content

Ignition Spark Check
GUIDE
Ignition Spark Check
An engine's ignition system is responsible for igniting the fuel-air mixture inside the combustion chamber and when the ignition process stops the engine will not run....

Sponsored links