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EricFromCT, Ford Technician
Category: Ford
Satisfied Customers: 3575
Experience:  20 years dealership exp., ASE A1-A9 L1 L2, Ford Lincoln Mercury Senior Master, Diesel Certified
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2012 Ford F-150 Ecoboost 3.5L engine shudders under heavy

Customer Question

2012 Ford F-150 Ecoboost 3.5L engine shudders under heavy acceleration. Moisture in the intercooler?
Submitted: 7 months ago.
Category: Ford
Expert:  piciu1982 replied 7 months ago.

whats your mileage ?? it might b ignition coil or worned out spark plugs witch r common on does engines.

Customer: replied 7 months ago.
Expert:  EricFromCT replied 7 months ago.

Hi. You request a different expert?

Customer: replied 7 months ago.
the "expert" I was given first had no clue about anything. I'm looking for someone with good knowledge and experience working on the Ford 3.5l ecoboost turbo engine. As I originally stated, it shudders under heavy acceleration. I've already read about it extensively on the web, but i'm looking for someone with practical experience solving it. Thanks.
Expert:  EricFromCT replied 7 months ago.

For the revised intercooler the condition of shuddering/stumbling under hard acceleration is on long highway drives in humid or damp weather.

Expert:  EricFromCT replied 7 months ago.

are those the conditions when you notice a shudder?

Customer: replied 7 months ago.
No, its anytime under heavy acceleration. Its probably bad plugs as well. I don't know the history on them.
Expert:  EricFromCT replied 7 months ago.

Yes. I agree you should start with the basics. You could at least remove them and see if they look worn. Has the check engine light ever came on?

Customer: replied 7 months ago.
The code was just for a generic engine misfire.
Expert:  EricFromCT replied 7 months ago.

if you have a specific cylinder misfire you can swap the suspect coil with a different one and see if the cylinder changes

Expert:  EricFromCT replied 7 months ago.

I see you viewed my response. DId you fix your car? do you need any assistance? Let me know so I can continue or close this question. Thanks.