× 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
1991 BMW 520i 2.0L Excessive Emissions, Poor Idle Quality
Posted to European Driveability on 6/26/2005 7 Replies

The car has M50 engine without catalytic converter. It has poor idle quality (hunting) and excessive emissions. Idle speed fluctuated from 620 RPM to 850 RPM and sometime the engine stall. HC reading 1500 ppm at idle. It went down to 500 ppm when the A/C is on...

7 Replies Received (View Replies)

 
Message Closed w/Summary

car Vehicle Data

1991 BMW 520i

VIN [No VIN Available]
Engine2.0 L / 6 cyl
DeliveryFI / DME
SymptomsExcessive Emissions, Poor Idle Quality
OccursAlways, Cold, Hot, Idle
Misc.E34 M50 Engine, No Cat

Trouble Codes

3injector cylinder 1
Message Closed w/Summary

car Vehicle Data

1991 BMW 520i

VIN [No VIN Available]
Engine2.0 L / 6 cyl
DeliveryFI / DME
SymptomsExcessive Emissions, Poor Idle Quality
OccursAlways, Cold, Hot, Idle
Misc.E34 M50 Engine, No Cat

Trouble Codes

3injector cylinder 1