[Red01SLT]

I checked the gap on the driver side and as far as I could tell it was around .40 to 44. I went ahead and got the Delphi TPS and changed it out, it seems to be better. But I didn’t drive it far like 4 miles home after I changed it. I’ll drive to work In the morning and see. It seemed to drive better.
but I still think it might of had more pep with the worn out Champion plugs tho.

 

[Duh-rango]

Could it be the difference in heat range between Champion (tad hotter) and NGK (tad cooler)?

ngk zfr6f11g - heat range of 6

NGK 6987 ZFR6F-11G V-Power Spark Plug

NGK 6987 ZFR6F-11G Spark Plug - Same Day Shipping. Free Returns. PayPal Accepted. Secure Online Ordering. Est. 1969.

www.ngk.com

Champion Rc12mcc4 - heat range of 12

Champion 439 RC12MCC4 Nickel Spark Plug

Champion 439 RC12MCC4 Spark Plug - Same Day Shipping. Hassle-Free Returns. Local Customer Service. PayPal Accepted. Secure Online Ordering. Est. 1969.

www.championiridiumplugs.com

 

[Red01SLT]

Could it be the difference in heat range between Champion (tad hotter) and NGK (tad cooler)?

ngk zfr6f11g - heat range of 6

NGK 6987 ZFR6F-11G V-Power Spark Plug

NGK 6987 ZFR6F-11G Spark Plug - Same Day Shipping. Free Returns. PayPal Accepted. Secure Online Ordering. Est. 1969.

www.ngk.com

Champion Rc12mcc4 - heat range of 12

Champion 439 RC12MCC4 Nickel Spark Plug

Champion 439 RC12MCC4 Spark Plug - Same Day Shipping. Hassle-Free Returns. Local Customer Service. PayPal Accepted. Secure Online Ordering. Est. 1969.

www.championiridiumplugs.com

View attachment 126276

Would that make that big a difference?

 

[Duh-rango]

Would that make that big a difference?

1-2 points, not really...just grabbing straws. I though maybe the difference in resistance but champion does not give the spec in kohms.

 

[Don Fox]

When I had my '01, I located the Champion Platinum plug that was equivalent to the oem Champion Copper. I ran them for 35-40k without issue. Quite a few 4.7L owners back in the day though, complained of rough running, misfires, and hard starts with whatever whizbang plug they had installed. Swapping back to the Champion Coppers, cleared up the issue(s) quite a few folks were having.

Here is the thread where I installed them. RC12PYP. Around 5 years later, I pulled them and went back with the Champion Coppers.

Champion RC12PYP platinum plugs

Not looking to start a debate on this subject, as we all know that DC recommends good old regular Champion plugs for our Durangos (the 4.7 anyway). My observation is this. When I pulled the factory Champions at 28K, they were what I'd term significantly worn. The rig ws running fine at the...

www.dodgedurango.net

Don

 

[Red01SLT]

I just put the champions back in it. Seems to run ok I guess.

 

[Red01SLT]

idk still having a issue. I replaced all that stuff and it’s still running ehhh. It ran good for 2 days then back to what it was doing. Maybe throttle body? TCM?