2011+ 55-60mph 5.0 Shuddering and EcoBoost Engine Miss/Loss of Power - Possible Fixes
Senior Member
Joined: Dec 2011
Posts: 174
Likes: 30
From: Wyoming
Could this miss that we are seeing under load ( boost) be caused by spark blowout because the oe coils cant handle the high compression and full boost when pulling up hills at low rpm. Usually u would see this at higher rpms with most f/I motors but the Eco seems to make its boost down low under load and then the boost tapers off at higher rpms. Just a thought
Senior Member
Joined: Jun 2011
Posts: 889
Likes: 54
From: Amarillo, TX
Well I thought my truck was fixed after having the misfire neutral procedure completed but after about 500 miles the low rpm misses are back including the 55 mph shudder. Immediately after the procedure was done on my truck it ran flawlessly. It was night and day difference but the missing and shuddering are slowly getting worse and worse. I guess I'll wait for another idea to come along.
Senior Member
Joined: Nov 2011
Posts: 1,003
Likes: 30
Aren't turbos driven off exhaust pressure. If so isn't it a low rpm no exhaust is coming out practically and the demand for power higher. Idk I think it's something to do with a sensor knowing how much pressure it has idk a thought. Maybe the mass air flow sensor?
Senior Member
Joined: Mar 2011
Posts: 762
Likes: 88
From: Nova Scotia, Canada
I doubt this could be the cause of our problem. At such low RPMs and similarly low boost pressures there could in no way be a spark blowout issue. Case in point, if this were indeed the cause, from a stop or slight roll and you mash the throttle, you'ld be going no where if the spark were blowing out at these full boost pressures, and as we all know, when we mash the loud pedal our trucks go quite well!
Senior Member
Joined: Dec 2011
Posts: 243
Likes: 1
From: St. Joseph, Mi
The other interesting thing to me is that the 2012 has different sensors in the air system according to air raid, thats why the 2011 system wont work on the 2012. At least thats what I got from a post I was reading.
Thread Starter
5 Year Member
Joined: Oct 2009
Posts: 1,676
Likes: 122
From: Wilmington, NC
Well I thought my truck was fixed after having the misfire neutral procedure completed but after about 500 miles the low rpm misses are back including the 55 mph shudder. Immediately after the procedure was done on my truck it ran flawlessly. It was night and day difference but the missing and shuddering are slowly getting worse and worse. I guess I'll wait for another idea to come along.
Thread Starter
5 Year Member
Joined: Oct 2009
Posts: 1,676
Likes: 122
From: Wilmington, NC
