Remove carbon build-up?
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New User
Joined: Jun 2004
Posts: 24
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Remove carbon build-up?
Hey all...
My 99 XLT 4.0 4x4 starting knocking like a broken screen door. I started running 93 octane and all was better..even got back up to 19-20 mpg's. For $100 the dealer can remove the carbon. My question is... will there be a marked improvement? Will the knocking eventually catch up with the 93 octane? I'm rather enjoying the improved gas mileage
,but I wouldn't mind seeing better response from the gas pedal.
(90K miles, btw)
My 99 XLT 4.0 4x4 starting knocking like a broken screen door. I started running 93 octane and all was better..even got back up to 19-20 mpg's. For $100 the dealer can remove the carbon. My question is... will there be a marked improvement? Will the knocking eventually catch up with the 93 octane? I'm rather enjoying the improved gas mileage
,but I wouldn't mind seeing better response from the gas pedal.(90K miles, btw)
Posting Guru
Joined: Nov 2003
Posts: 1,221
Likes: 0
From: Homer, Alaska
Are you sure it is a carbon buildup problem? Did the problem just all the sudden start or gradually get worse with time? Are you getting a CEL? Most of the time a good road trip on the highway will get rid of carbon problems. What kind of driving do you do? Short trips in town or highway trips?
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
No need to fork over $100 for a decarbon procedure when you can do it yourself for the cost of a couple cans of cleaner, just like the dealer would do it:
https://www.ford-trucks.com/forums/s...hreadid=100739
https://www.ford-trucks.com/forums/s...hreadid=100739
