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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


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  #1  
Old Fri, April 20th, 2012, 09:33 PM
PerpetualSeanX PerpetualSeanX is offline
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With all due respect, Dave you aren't telling me anything I don't know. Lol That's why I'm so frustrated with the shop. If it isn't right when I bring it back and they install a new set or try and refuse it there will be issues. I'm trying to give them their chance to save face. I really don't like being a jerk. If I'm forced to however I will.

On the issue of power, do you think there are any other issues I could hav causing power loss if after. Clean the Mas and replace the fuel filter along with cleaning the throttle body while I'm at it.
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Old Fri, April 20th, 2012, 10:31 PM
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I would start with the basics and move on from there, your on the right track.
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Old Fri, April 20th, 2012, 11:17 PM
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Back in late '09 from the Mad Doctor himself:

"Oh... and my Expy will beat most of the F-150s in the area. I haven't lost against one yet. The 3.31 gearing actually seems to help the engine produce more torque by increasing load and letting the engine pull harder. I've seen trucks go with shorter gears and actually lose performance because of load loss on the engine. Go figure... "
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Old Fri, April 20th, 2012, 11:22 PM
PerpetualSeanX PerpetualSeanX is offline
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Man that would be a real ball breaker if that was my issue!
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Old Fri, April 20th, 2012, 11:23 PM
PerpetualSeanX PerpetualSeanX is offline
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Also thanks a lot for the replies you guys. I love this forum and everyone in it!
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Old Sat, April 21st, 2012, 12:27 AM
PerpetualSeanX PerpetualSeanX is offline
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Quote:
Originally Posted by 907DAVE View Post
I would start with the basics and move on from there, your on the right track.
Thanks will do. It'll be my first time doing the filter. Is it a pain? Looked at some videos didn't seem to be too bad aside from taking off the fuel line pressure by turning off some switch in the fuse box. I'm trying to teach myself mechanic stuff so I no longer have to depend on people I don't trust. What do you think about spark plugs? Another thing I think may have been neglected. Not sure if I've said but my trucks got 75k miles. Could spark plugs cause power issues? Also I've heard of horror stories of removing spark plugs and snapping stuff...I've been less than excited to do those but think its probably pretty due.

I never did much aside from change my oil until recently did my own front brakes was proud of myself. Haha. I'm 25 never worked on cars. Feels like something a real man should do. So here I am trying to be a "real man".

Last edited by PerpetualSeanX; Sat, April 21st, 2012 at 01:07 AM.
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Old Sat, April 21st, 2012, 10:14 AM
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Quote:
Originally Posted by PerpetualSeanX View Post
Thanks will do. It'll be my first time doing the filter. Is it a pain? Looked at some videos didn't seem to be too bad aside from taking off the fuel line pressure by turning off some switch in the fuse box. I'm trying to teach myself mechanic stuff so I no longer have to depend on people I don't trust. What do you think about spark plugs? Another thing I think may have been neglected. Not sure if I've said but my trucks got 75k miles. Could spark plugs cause power issues? Also I've heard of horror stories of removing spark plugs and snapping stuff...I've been less than excited to do those but think its probably pretty due.

I never did much aside from change my oil until recently did my own front brakes was proud of myself. Haha. I'm 25 never worked on cars. Feels like something a real man should do. So here I am trying to be a "real man".
Here are some tips for the fuel filter...

1. Pick where you're gonna do it and park the truck. Let it sit with the key out of the ignition for at least an hour. It'll give the fuel a chance to lose pressure. When you are picking a place to do it, go where you won't mind a bit of fuel being sprayed. It WILL be at least a partially pressurized system when you break the seal on it.

2. Wear safety glasses. Not sure if this is an issue for you but my dad is really bad about it. I was holding a pair out to him because he kept refusing. Then when he got the fuel disconnected it sprayed right in his face. He hates it when I say "I told ya so"

3. It's easy if you do your reading ahead of time.

If the filter has never been changed I'm surprised that the truck is still running.
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Old Sat, April 21st, 2012, 03:56 PM
PerpetualSeanX PerpetualSeanX is offline
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Quote:
Originally Posted by Longshot270 View Post
Here are some tips for the fuel filter...

1. Pick where you're gonna do it and park the truck. Let it sit with the key out of the ignition for at least an hour. It'll give the fuel a chance to lose pressure. When you are picking a place to do it, go where you won't mind a bit of fuel being sprayed. It WILL be at least a partially pressurized system when you break the seal on it.

2. Wear safety glasses. Not sure if this is an issue for you but my dad is really bad about it. I was holding a pair out to him because he kept refusing. Then when he got the fuel disconnected it sprayed right in his face. He hates it when I say "I told ya so"

3. It's easy if you do your reading ahead of time.

If the filter has never been changed I'm surprised that the truck is still running.
Thanks for the pro tips ill definitely take heed. Wearing safety glasses is something I never do I will this time around.

You'd think all of this stuff would be bad news for me but with my performance issues I'm using I'm excited to see what difference it makes when I do some well need maintanence on it.

PS: I got this truck only 13ish k miles ago, that's why all the unknown.

Last edited by PerpetualSeanX; Sat, April 21st, 2012 at 04:21 PM.
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Old Sun, April 22nd, 2012, 02:19 PM
PerpetualSeanX PerpetualSeanX is offline
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Replaced fuel filter, cleaned MAF sensor, and throttle body. Times just as bad although it seems to have helped gas milage with the little driving I did.

Perhaps the gearing is too steep and that's what caused it? I'm thinking of dropping to 4.10 gears.

Id just like my truck to be in the 8 second 0-60 range. I don't think that's too terribly much to ask...
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Old Sun, April 22nd, 2012, 11:53 PM
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Quote:
Originally Posted by PerpetualSeanX View Post
Id just like my truck to be in the 8 second 0-60 range. I don't think that's too terribly much to ask...

To get into the 8's you're looking at forced induction (and smaller tires).

Once you go with forced induction, don't plan on using your truck anymore (i.e. the truck becomes a fuel-eating toy).
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