What is the general opinion on spark plugs for the 2004 4.7 HO engine? We bought our Overland used with 80K miles and I figured the plugs have never been changed (assuming). Which ones should I go with?

Also, the vents blow a lot weaker on the passenger side than the drivers side. I suspect some kind of flap or something is not opening up all the way but is that hard to get to? I really don't want to have to pull the dash apart.

Thanks!!

Jimmy

 

Spark plugs I would go with the regular ngk (that's my opinion their will be others lol)
The passenger side air I'm not sure but if you have the option to regulate the air with the controls its probably a flap stuck.

 

Hey Jimmy, Welcome to CF.
This will tell you about the recommended plugs for the 4.7L HO. >http://www.wjjeeps.com/ho_engine.htm#SPECS
This will explain about the issue I think your having with your blend doors. >http://www.heatertreater.net/Grand%2...%20re-circ.htm
Here's some more info on that. >http://www.wjjeeps.com/hvac_sub_assembly.htm

 

I completely forgot about the WJJEEPS.com site. Thanks!!

Jimmy