4.2 V6 Engine Shudder

Reply Subscribe

Thread Tools

Search this Thread

Jan 25, 2008 | 05:05 PM

vsf100

Thread Starter

New User

Joined: Dec 2005

Posts: 23

Likes: 0

From: Winder, GA

4.2 V6 Engine Shudder

I recently purchased a 2005 F-150 with the V6 engine and automatic transmission. The truck has 57,000 miles, and I chose the V6 because Consumer Reports rated this engine as very reliable. I am very pleased with the truck, however, sometimes I get a pretty strong shudder as the engines stops after turning off the ignition. It doesn't happen every time, probably 15-20% of the time. If it matters, the truck is an XL Regular Cab with very few options, and no carpet--just a rubber floor mat. Anyone else have this problem?

Jan 26, 2008 | 12:38 AM

GIP1979

Freshman User

Joined: Feb 2007

Posts: 35

Likes: 0

mine does it when starting up sometimes. i have an 07. maybe its just what they do.

Jan 26, 2008 | 08:49 PM

MMARSS

Freshman User

Joined: Dec 2004

Posts: 37

Likes: 0

From: Staunton, VA

I recently traded in my '98 XL 4.2 w/ 170k, and it did the same thing when I shut the engine off. I bought it w/ 80k on it, and it did it then too. Just a 4.2 balance thing, I reckon.

j

Jan 26, 2008 | 09:44 PM

jstnromero

Postmaster

Joined: Nov 2006

Posts: 2,807

Likes: 0

From: The Woodlands, TX

mine does it too....i agree it must be a balance thing.

Jan 26, 2008 | 09:52 PM

Lead Head

Lead Driver

Joined: Jul 2007

Posts: 7,868

Likes: 9

From: Rhode Island

Even my little 2.9L Ranger V6 does that. Probably just depends on where the pistons are in the compression stroke when you turn it off, and the fact that the V6s in our trucks aren't naturally balanced engines. The only balanced V6 is a 180 degree bank angle, wich would be a flat-six.

Jan 26, 2008 | 09:54 PM

bigblock_drock

Elder User

Joined: Jul 2007

Posts: 651

Likes: 0

it could be 'dieseling' but i dought that ALL of you were having that issue, they must just be like that.

Jan 26, 2008 | 11:57 PM

Lead Head

Lead Driver

Joined: Jul 2007

Posts: 7,868

Likes: 9

From: Rhode Island

You can't diesel with fuel injected engines :-P, once the key is turned off, the fuel stops coming, unless you were burning tons of oil, but if you were burning enough oil to cause dieseling, I think you'd notice it :-P