Check these items as first steps:
- base idle engine vacuum (should be steady 18-21 Hg)
- air filter (replace as needed),
- air intake system (no leaks),
- fuel system pressure (measure at the fuel pump outlet, and also at the engine fuel rail),
Maintenance kept up? Be sure to follow the recommend service intervals in the owners manual
Follow-up question - have the spark plugs been changed in the last 30k-100k miles?
- clean the electronic throttle body (ETB) with an aerosol spray cleaner (specifically for throttle bodies) - be sure to follow instructions; dry thoroughly,
- test the throttle body for defects,
- replace the throttle body gasket,
or the throttle body itself as described below link(s):
Ford recall #13N03 and 13B17 for the ETB defects - contact the local dealerships
The early stages of this new investigation relate specifically to Ford Escape models from the 2005 through 2012 model year with a total of 1.6 million SUVs possibly affected by the process. According to the North Carolina Consumers Council (NCCC), these vehicles are equipped with an electronic throttle body system that could fail - causing the engine to either surge or stall in the right situations.
The NCCC issued this call for action after receiving two complaints from area consumers who had problems with their 2009 Ford Escape intermittently stalling when cruising at highway speeds or when sitting when stopped as well as a problem with the engine surging when accelerating away from a stop. These two reports explained that the problem became severe enough that the driver was operating the vehicle with one foot on the brake and one foot on the gas to keep the car going forward (and not stalling) while also prevent it from surging forward. The driver also had to keep applying the gas when stopped to keep the vehicle from stalling. In both of these filings with the NCCC, the vehicle had a check engine light illuminated and when the codes were pulled by a mechanic, the result was a trouble code of P2111 and P2112 - indicating that the electronic throttle actuator control system was stuck open (P2111) and closed (P2112). Also, both drivers reported that there had been no problems or warnings leading up to these engine issues.
MARCH 2, 2015
There's good news for thousands of consumers affected by defective throttle bodies on Ford Escape and Fusion, and Mercury Milan and Mariner vehicles.
EXTENDED WARRANTY ISSUED
Ford has recently agreed to issue an extended warranty to cover any potentially defective throttle body assemblies within certain limits. The program extends the warranty coverage of the throttle body to 10 years of service or 150,000 miles from the warranty start date of the vehicle, whichever occurs first.
The extended warranty covers certain model year 2009-2013 Ford Escape, Ford Fusion, Mercury Milan and Mercury Mariner vehicles. Extended warranty coverage is automatically transferred to subsequent vehicle owners.