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| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#2
Mon, March 15th, 2010, 11:18 PM
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Personally as long as the truck is in sound mechanical shape and routine maintenance has been performed then a tuner won't be an issue.
To do a compression test at home you need to go out and buy a tester gauge. Remove spark(s) plug and put adapter in the hole and crank the motor. Another GOOD investment is a Haines or Chilton repair/service book what can be purchased/ordered at an auto parts store or online. Peace! 
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#3
Tue, March 16th, 2010, 04:09 AM
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Might be cheaper to take it to a dealer, or someone who has an IDS to do a Relative Compression Test. They can preform this test without even opening the hood, and it is very accurate.
I am with 88 on this, if the vehicle has been well maintained I would not be the least bit worried about adding custom tunes. Just a thought.
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#4
Tue, March 16th, 2010, 07:49 AM
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Im afraid to have a compression check done
 but seriously you would never know it had the high miles driving it. It was extremely well taken care of. i dont plan on beating up on it just want it to be a little more responsive and shift a tad firmer like my previous 06 did
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#5
Tue, March 16th, 2010, 09:16 AM
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I wouldn't worry about it.
If you want the improved custom tune response and shifts then get them.
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SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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