I put a afm cold air intake on my 150 supercrew 4x4 5.4 auto. About a month ago. I am now noticing my gas miles has dropped to 9 mpg from 13 and I have like a skip in my truck sometimes at highway speeds. Could this be coming from the intake? I have no engine lights on please help.

 

Those things do very little good unless you have a tune for it. Plus, they can cause you to run in a lean condition, especially if your truck is a 2004 or 2005. What year is it?

How many miles on the plugs?

 

ditch the intake. may need plugs

 

2001 with 311100 miles plugs have about 40k miles on them but my truck over heated and blew water all over the engine a couple months ago do you think it could have shorted a coil pack? I've never changed the coil packs

 

If I put long tube headers on do away with cats put in an xpipe with dual exhaust get a custom tune with the air intake plus new plugs and all new coil packs will that breath some new found life in my old truck?

 

It would be alot cheaper than a new truck plus I'm attached to my truck got it new dont want to let her go

 

Fix the miss first before adding power adders. Also put your stock intake on till you get a custom tune for everything you want to put on it.

maybe also change all 4 O2 sensors with motorcraft ones..

 

Ok I've never changed them or anything else on the motor. Just plugs and a new intake when the old one cracked.

 

Where can I get a custom tube from everyone keeps talking about. I'm in South Carolina and if I get one so I need the truck there so they can use a laptop or will it plug in to my port under my dash

 

Tune

 

Ya O2 sensors are usually changed at 100,000 or so.
I had all four of mine go within a few months of each other after I hit 100,000 miles..

 

Custom tunes are email order tunes.
Go take a look over in the programmer section and read the stickies.

 

Ok thanks.

 

Did you disconnect the batter when you installed it? It resets the ecu so it can learn the new air thats coming in.

 

No but I will try that.