Hey guys, I just recently bought a pretty slick 80,000 mile Harley truck. Its a supercharged 02 model.

The basics:
bought with 80,000 miles. Had aftermarket supercharger pulley (upper) and custom tunes.

I couldn't get in touch with the previous owner, but when this weather turned colder, I began having problems with a CEL and it said it was running lean. I decided since it had unknown tunes, I would have ford flash it to latest factory tunes. I then put a diablo sport with the Performance 93 octane pulley tune on it.

Am I on the right track with these tunes?

Also, I am wondering if I need to give any attention to the spark plugs before I have trouble? I really doubt she's ever had a tune up at these miles (My 02 explorer didn't need one till 100k.) but in this case, do I need to do something before I have trouble with the plugs sticking in the heads?

Finally, what is detonation all about? I occasionally hear a ticking when I'm in it really hard, but I let out and it quits. Any worries?

 

Detonation is a motor killer. Put that thing on a chassis dyno with a wide band air fuel meter. The dyno guys can tell you what needs adjusted on your diablo. Hand held tuners are great, but you can't use them to their full potential without a dyno and A/F meter.

 

Where would you all recommend for that? Someone smart on these...

 

I just googled "kentucky chassis dyno" and came up with these guys. I don't know anything about them, it's the first thing I saw. Do some research on them. Google maps says they are about 3 hours from ya. As long as they have a wide band air/fuel meter they should be able to get you set up.

SpeedyDyno.com

 

If you were in Oklahoma id say come to our shop.