Ford F150 Forum - Community of Ford Truck Fans

Topic Sponsor
2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

Rough Idle Only On Startup

Thread Tools
 
Search this Thread
 
Old 03-02-2018, 01:46 PM
  #11  
Mark
iTrader: (1)
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 36,868
Received 2,416 Likes on 2,117 Posts

Default
Sounds like a cracked manifold to me..
techrep is offline  
Reply Like
Old 03-03-2018, 12:16 PM
  #12  
Monks
Thread Starter
 
650NutKase's Avatar
 
Join Date: Jan 2016
Location: Chuco Town, TX
Posts: 1,850
Received 248 Likes on 221 Posts
Default
Ok, grabbed a startup video. Checked the entire exhaust over, just a couple small leaks aroun the passenger side cat that was replaced last year. No manifold cracks that I could see. Would that still make it sound like this??

https://drive.google.com/file/d/1IcnuJ_UHKPpMxm1FKvQFMVlHKpUnB5Ke/view?usp=drivesdk
650NutKase is offline  
Reply Like
Old 03-03-2018, 06:40 PM
  #13  
Mark
iTrader: (1)
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 36,868
Received 2,416 Likes on 2,117 Posts

Default
Exhaust manifold will contract and expand when hot and cold..
techrep is offline  
Reply Like
Old 03-04-2018, 02:46 PM
  #14  
Member
 
jaiello's Avatar
 
Join Date: Sep 2017
Posts: 77
Received 9 Likes on 9 Posts
Default
Crap mine has been sounding like that and worse the whole time I owned it. I thought it may be the timing chain and tensioners slapping against the guides. Once it drops down in idle its perfectly fine. I guess I will be checking the manifold. That sucks because I just ordered about $1,500 dollars worth of crap and specialty tools to do the timing on it.
jaiello is offline  
Reply Like
Old 03-05-2018, 12:23 PM
  #15  
Monks
Thread Starter
 
650NutKase's Avatar
 
Join Date: Jan 2016
Location: Chuco Town, TX
Posts: 1,850
Received 248 Likes on 221 Posts
Default
Originally Posted by techrep
Exhaust manifold will contract and expand when hot and cold..
but it seems to only be that noisy on initial start up...would the manifold expand and quiet down that quickly?
650NutKase is offline  
Reply Like
Old 03-05-2018, 12:31 PM
  #16  
Mark
iTrader: (1)
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 36,868
Received 2,416 Likes on 2,117 Posts

Default
Originally Posted by 650NutKase
but it seems to only be that noisy on initial start up...would the manifold expand and quiet down that quickly?
‘mine makes noise on start up, and is gone when idle drops ..
techrep is offline  
Reply Like
Old 03-05-2018, 12:53 PM
  #17  
SSDD
 
SCORGE's Avatar
 
Join Date: Feb 2016
Posts: 17,605
Received 1,611 Likes on 1,125 Posts

Default
Yep, I vote manifold
SCORGE is offline  
Reply Like
Old 03-05-2018, 01:11 PM
  #18  
Monks
Thread Starter
 
650NutKase's Avatar
 
Join Date: Jan 2016
Location: Chuco Town, TX
Posts: 1,850
Received 248 Likes on 221 Posts
Default
Alright, I'll have to really check the manifolds then... fun...
650NutKase is offline  
Reply Like
Old 03-05-2018, 01:45 PM
  #19  
Mark
iTrader: (1)
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 36,868
Received 2,416 Likes on 2,117 Posts

Default
Originally Posted by 650NutKase
Alright, I'll have to really check the manifolds then... fun...
start on the passenger side.. drivers side normally don’t cause problems..
techrep is offline  
Reply Like
Old 08-26-2020, 06:22 PM
  #20  
Junior Member
 
f4iguy69's Avatar
 
Join Date: Aug 2020
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by 650NutKase
Alright, I'll have to really check the manifolds then... fun...

Did you ever resolve your issue? I’m having the exact same issue with my 2008.
f4iguy69 is offline  
Reply Like



Advanced Search
Quick Reply: Rough Idle Only On Startup


Reply Closed Thread Share

All times are GMT -4. The time now is 01:30 PM.