Rough Idle-Im stumped!

Reply Subscribe

Thread Tools

Search this Thread

Aug 11, 2012 | 04:31 PM

#16

creeper113

Thread Starter

Freshman User

Joined: Jun 2012

Posts: 47

Likes: 0

Whats a good way to tell if the PCV valve is bad? I will give the carb cleaner a shot as well.

Aug 11, 2012 | 05:00 PM

#17

kbsupercrew

Senior User

Joined: Sep 2011

Posts: 448

Likes: 1

Should hear a ball noise when you shake it, should be closed at idle, pull the hose off and plug it with you finger does motor smooth out?
If bad you probably been using more oil than normal

Aug 11, 2012 | 07:48 PM

#18

BCHauler

Fleet Mechanic

Joined: Apr 2008

Posts: 1,724

Likes: 2

From: Vancouver BC Canada

Does the 2010 v10'have egr? I believe the v10 has the egr on the passengers side. Either a stuck open egr or leak in the egr can cause rough idle, stumble, hard start. My v10 doesn't have egr, but I know that pre-modular ford motors had a tendency to develop a crack in the tube running from the passengers side manifold to the egr valve. Caused all sorts of issues. Was often hard to notice because the tube was covered in a heat sleeve.

Sorry if his isn't relevant to your truck but I'm not sure what the newer v10s have. Good luck.

Aug 16, 2012 | 11:34 AM

#19

creeper113

Thread Starter

Freshman User

Joined: Jun 2012

Posts: 47

Likes: 0

Well I spent days pulling and inspecting every single vacuum line on the truck. Vacuum is good so I did a compression check. Cylinder 4 has 0 compression. Gonne pull the valve cover and have a look and then potentially the head to see how bad it is. Prolly gonna be looking for a used engine soon. Anybody know where I can get a better deal than this; salvage engine COMPLETE with 2 year warranty. 4 grand includes shipping. And hey, thanks for everyones input thus far.

Aug 17, 2012 | 12:34 AM

#20

creeper113

Thread Starter

Freshman User

Joined: Jun 2012

Posts: 47

Likes: 0

Well I got the valve cover off and turns out it sucked a valve on #4. Already in the process of pulling the engine. Any Ideas on a good place to get cheap used V-10's?

Aug 22, 2012 | 12:11 AM

#21

creeper113

Thread Starter

Freshman User

Joined: Jun 2012

Posts: 47

Likes: 0

Well heres an update. I found a used V-10 out of a 2010 F250 on automotix.com. I payed 4 grand including shipping. 32k motor and they gave me a one year warranty. Pretty banging deal if ya ask me. Of coarse I never wanted to drop 4 g's on a engine for my 2 year old truck but I think I got about the best deal out there. Engine pull is coming along. All thats left is bellhousing, motor mounts, and exhaust. Then finish fabricating my piece to bolt to the engine for the picker and jerk it. Any good advice to know before and while dropping in the new one?

Aug 22, 2012 | 07:33 AM

#22

krewat

FTE Leadership Emeritus

Joined: Jul 2002

Posts: 42,561

Likes: 423

From: Long Island USA

Glad you found a decent engine... not too many people have pulled the entire motor, but I think removing all the up-front stuff you can, like grill, radiator, everything, is a good thing

Aug 22, 2012 | 12:51 PM

#23

mikeismadness

Posting Guru

Joined: Aug 2007

Posts: 1,858

Likes: 6

From: laporte in

Yup having the front end apart helps a lot. I pulled a 7.3 out of a 99 before and it was actually impossible to get the motor out without removing the radiator, grill, and core support