Quick Recommendations for Tune up
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Joined: Jun 2005
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From: Oshkosh Wisconsin
Quick Recommendations for Tune up
Hey guys trying to solve the rough idle issues. I'm going to be doing a tune as I'm not sure when the last time the plugs have been changed... wish me luck!
Here is a basic list thus far:
- 8 plugs
- 8 COP boots
- PCV
- IAC valve
- Oil filter/fluid change
- Air filter
- Check coolant
- Transmission fluid/filter change
- Front/rear diff fluid
- Transfer case fluid
* would like to change the power steering and brake line fluid but probably won't get to that
I'm noticing a rough idle but it doesn't seem to effect drive ability at all (no misses), only when idling. It's really annoying.
Also I'm getting a pretty loud knocking way down low. I don't think it's the typical piston knock that some have experienced... i hope it's not something bad. But again i only really hear that at idle as well.
Lastly I have the exhaust manifold gasket leaking. I was wondering do shorty headers make a difference? If I'm going to to replace the gasket might as well upgrade! I already have a flow master cat back.
This is all on a 2003 5.4 with 120k miles.
Thanks,
Brian
Here is a basic list thus far:
- 8 plugs
- 8 COP boots
- PCV
- IAC valve
- Oil filter/fluid change
- Air filter
- Check coolant
- Transmission fluid/filter change
- Front/rear diff fluid
- Transfer case fluid
* would like to change the power steering and brake line fluid but probably won't get to that
I'm noticing a rough idle but it doesn't seem to effect drive ability at all (no misses), only when idling. It's really annoying.
Also I'm getting a pretty loud knocking way down low. I don't think it's the typical piston knock that some have experienced... i hope it's not something bad. But again i only really hear that at idle as well.
Lastly I have the exhaust manifold gasket leaking. I was wondering do shorty headers make a difference? If I'm going to to replace the gasket might as well upgrade! I already have a flow master cat back.
This is all on a 2003 5.4 with 120k miles.
Thanks,
Brian
Senior User
Joined: Sep 2011
Posts: 448
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clean maf with maf cleaner, fuel filter, and might as well change the upstream 02 sensors when you fix the exhaust leak, shorty headers will make little difference, I only noticed a very little more pull in the upper rpms only, thats what it seems like anyway
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Posting Guru
Joined: Jun 2005
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From: Oshkosh Wisconsin
Did the shorties give you a bit more noise? The 50 series is pretty quite for my taste.
Senior User
Joined: Sep 2011
Posts: 448
Likes: 1
Not really, at idle they sounded like stock manifolds, at the upper rpms you could hear them alittle, here is my mod link, headers and catback gibson super truck
https://www.ford-trucks.com/forums/1...-possible.html
https://www.ford-trucks.com/forums/1...-possible.html
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ExpoBoi99
1997 - 2006 Expedition & Navigator
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Mar 12, 2004 08:51 PM
