2007 Ford F150 Engine Shake (possibly A/C problem) - Ford F150 Forum - Community of Ford Truck Fans
Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 2004 - 2008 Ford F150
Sign in using an external account
Register Forgot Password?


2007 Ford F150 Engine Shake (possibly A/C problem)

Reply
 
 
 
 
Thread Tools Search this Thread
Old 06-15-2015, 10:37 AM   #1
Member
5 Year Member
 
lavigeboy27's Avatar
 
Join Date: May 2009
Location: Scranton, PA 18508
Posts: 89
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default 2007 Ford F150 Engine Shake (possibly A/C problem)

Hi,

My Girlfriend drove my F150 over to Naples, FL which is about a 3 hour drive. She noticed a vibration coming from the engine (4.6L automatic 4x4) when she got over there. There is no knock just a vibration and there is no lights coming on. She drove it back without any problems. But I'm still getting the same shake. When I was looking in the engine I noticed that the belt tensioner was shaking too. I put the A/C off and it went away, it stopped shaking. I was wondering if anybody had this problem before? Do I need to replace the A/C compressor clutch? I just replaced the fan clutch on it. I read something about a switch doing it. Do you have any suggestions?

Thanks,
Bill
lavigeboy27 is offline   Reply With Quote
Join F150 Forum

Join F150Forum.com Today - It's Totally Free!

Are you a Ford F150 fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford F150 Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your truck, and have a great time with other Ford F150 fans. Whether your an old timer or just bought your F150 you'll find that F150Forum.com is a great community to join. Best of all it's totally free!

Join F150Forum.com Today! - Click Here JOIN FOR FREE


-->
Old 06-28-2015, 08:18 PM   #2
Junior Member
 
Join Date: Jun 2015
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

I have a 2007 F-150 with the 5.4 engine and had the same vibration when the A/C was on. Ford said it was the tensioner, but that didn't make sense to me. So I replaced the a/c compressor and the vibration went away. The bearings were going bad causing a tight spot that caused the vibration. I've seen this problem on several forums, but no one came back to say how they finally fixed it. So here's the answer!!
marvcraf is offline   Reply With Quote
Old 06-29-2015, 06:10 AM   #3
Moderator
5 Year Member
 
Bucko's Avatar
 
Join Date: Sep 2008
Location: Lake Mary Florida
Posts: 7,450
Thanked 161 Times in 130 Posts
Feedback Score: 0 reviews
Default

How old is the belt and tensioner: The tensioner should be replaced whenever the belt is replaced.


It could be the A/C clutch, but I'd want to know for sure before I toss a new one at it.
__________________
Give an answer, they learn for the day; suggest a search, they learn for a lifetime.

2007 F150 STX Supercab (4.6 2V V8)
Bucko is offline   Reply With Quote
Old 06-29-2015, 08:22 AM   #4
Junior Member
 
Join Date: Jun 2015
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Bucko, I replaced the belt last fall when I replaced the plugs. The tensioner is original to the truck. Never heard of replacing the tensioner with the belt, and the Ford house didn't recommend it. With 128,000 miles, and to save time and money, I thought it best to replace the compressor rather than just the clutch. In this case it was a good call, as the bearings were clearly bad.
marvcraf is offline   Reply With Quote
Old 06-29-2015, 08:25 AM   #5
Moderator
5 Year Member
 
Bucko's Avatar
 
Join Date: Sep 2008
Location: Lake Mary Florida
Posts: 7,450
Thanked 161 Times in 130 Posts
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by marvcraf View Post
Bucko, I replaced the belt last fall when I replaced the plugs. The tensioner is original to the truck. Never heard of replacing the tensioner with the belt, and the Ford house didn't recommend it. With 128,000 miles, and to save time and money, I thought it best to replace the compressor rather than just the clutch. In this case it was a good call, as the bearings were clearly bad.
No worries; if it's bad, then it gets replaced. Most A/C compressors have the ability to have just their clutches replaced instead of having to open the "system" with a complete compressor replacement.


I've always replaced the tensioner with a belt replacement; strange that the Ford house did not recommend this.
__________________
Give an answer, they learn for the day; suggest a search, they learn for a lifetime.

2007 F150 STX Supercab (4.6 2V V8)
Bucko is offline   Reply With Quote
Old 06-29-2015, 09:15 PM   #6
Member
5 Year Member
 
lavigeboy27's Avatar
 
Join Date: May 2009
Location: Scranton, PA 18508
Posts: 89
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by marvcraf View Post
I have a 2007 F-150 with the 5.4 engine and had the same vibration when the A/C was on. Ford said it was the tensioner, but that didn't make sense to me. So I replaced the a/c compressor and the vibration went away. The bearings were going bad causing a tight spot that caused the vibration. I've seen this problem on several forums, but no one came back to say how they finally fixed it. So here's the answer!!

It seems like it's a common problem with the F150. Mine is doing the same thing. I talked to a mechanic with an 07 F150, he had the same problem. It's the A/C compressor.

It sucks, my truck only has 67,000 miles on it. I never in my life replaced a A/C compressor with this low of mileage. I had other cars with over 150,000 miles with the original compressor. Ford needs to step up.

Thanks for the help.
lavigeboy27 is offline   Reply With Quote
Old 06-29-2015, 09:15 PM
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT -4. The time now is 11:44 PM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.