bobflood
Elite Explorer
- Joined
- May 27, 2010
- Messages
- 1,578
- Reaction score
- 39
- City, State
- Powder Springs, GA
- Year, Model & Trim Level
- 1997 Eddie Bauer V8 2WD
Ahh thank you bob, that makes much more sense, it's also the best explanation i've read of what the fan clutch does exactly. What kind of resistance should I expect when spinning the fan while cold? 1 full rotation or so?
Also the reason I was thinking about replacing the O2s was just because they are the stock sensors and have 215,000 miles on them. What do you think bob? Thanks for all your help throughout this thread as well
Not sure about fan resistance - and wife has the truck right now. I'll try to remember to give it a spin in the AM and see then let you know.
I generally would not replace O2 sensor's without some indication the they are bad. However, if you stilll have poor performance/lousy gas mileage after doing other stuff, they may help.
Did you ever check out the Engine Coolant Temp sensor that the ECU uses?? If the computer thinks that engine is cold, it will dump in more gas, thus contribting to lousy mileage. There are separate sending units for the ECU and the guage - the one with two wires goes to the ECU. One of the wires should be light green/red.
Good luck!!