× 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
Re: Oxygen sensors on 87 toyota 4-runner
Posted to Technical Theory Forum on 3/3/2004

[...trimmed text...]

Hi John,

I think that Brian is giving you the right idea. I would do a voltage drop test on the battery cables first, engine cranking. Then I would go to the computer ground and check for voltage dr... Login to read more.