I can hear it as soon as I step on the throttle (sort of a tinny sound.) I had the truck in at Ford. They put their diagnostics on it and claimed all the codes check out allright. They agree with me that their is definitely a problem but do not know what to do about it.

I ran chevron techron through it with no results. Ford still thought it was a carbon problem so they ran some kind of powerwash carbon cleaner through it. But it didn't help at all. I also cleaned the MAF.

Any ideas?? Would too much exhaust backpressure cause it? (clogged cats)? The truck also seems low on power. Any help would be appreciated. Thanks!

P.S. I love this site!!!!



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1998 F250 XLT 4x4 reg. cab/long box 5.4L auto with 3.73 gears.

Modifications:

K&N air filter, removed cold air intake.
Lund Intercepter bug shield.
Molded mud flaps
Husky floor liner

 

Farmtruck

You will find posts about pinging, but the simplest fix to date has been to clean your MAF sensor with a Q-tip and rubbing alcohol. The problem seems to plague the K&N users especially after they clean it for the first time and re-oil.


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99 4X4 XLT S/C with ORP
5.4L 3.73LS
Flow Master Dual Exhaust
K&N Filter w/ Intake Mod
Flex-a-Lite Black Magic 150 Electric Cooling Fan
Jason "Hugger" Truck Lid