× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1990 BMW 325i, Ignition Waveform
Posted to the Waveform Library on 4/27/2014

No spark. Added more time to the screen to see more of the waveform. Red is ignition coil current, which isn't being shut off completely, so without a quick collapse of the magnetic field in the primary windings there cannot be a spark created.

 

car Vehicle Data

1990 BMW 325i 2.5L

Engine2.5 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemIgnition
Component
ConditionKnown Bad

car Vehicle Data

1990 BMW 325i 2.5L

Engine2.5 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemIgnition
Component
ConditionKnown Bad