minigts

Does anyone happen to have a diagram of the wiring for the 2002 SC model? I am looking to install a lean/rich gauge, but I'm not sure which wire is the signal. Trying to avoid going to the store, but if need be I will.

Just thought I would ask.


Thanks,


minigts

OffroadX

Not quite sure I follow what purpose this would serve. The engine computer monitors that pretty strictly and it's not something you can tweak or learn anything from. You may as well install a guage that tells you what the current firing order is...

Brent

minigts

Actually, you can learn a lot from monitoring the air to fuel ratio. And you can adjust it. When the truck was getting about 300 miles to the tank and then starts getting 260 miles per tank, there is a problem. Using a gauge to see the mixture will tell me whether or not the computer is sending more fuel than necessary to the engine. There is also a company in my area that provides computer upgrades and modifications that can adjust fuel amounts sent to the engine as well as other things.

Keeping track of how your engine is running, tempatures and so forth is a good thing. From your reasoning, why have a tach or tempature gauge? Why not just have a light that comes on and notifies you something is wrong or low on gas and no gauges? Having gauges that monitor how your engine is running is not superfluous.

If anyone has a wiring diagram, I would appreciate it.

jim dillard

as a diagnostic toll you are correct you can learn a lot but I don't agree with your statement about adjusting it. If the engine is sending in more fuel then you think it should it is usually the result of something else. If the o2 sensor reads a lean condition (vacuum leak) it will drive the mixture richer to compensate, so if you lean the engine out it will go richer. You should go to the forums to discuss the drop in fuel mileage, but a good scan tool will help you a lot.
Jim