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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I have a 2007 Mercury Monterey 4.2l with a bad hesitation,

Customer Question

Hello, I have a 2007 Mercury Monterey 4.2l with a bad hesitation, stumble, under hard acceleration when this happens the anti theft light and the battery light also flashes. No check engine light at this time. Any ideas what to check next. Any help would be appreciated.
Tom
Submitted: 4 months ago.
Category: Ford
Expert:  AMEDEE replied 4 months ago.

Hello and welcome!

My name is ***** ***** I can assist you with your question.

Expert:  AMEDEE replied 4 months ago.

I am very sorry your having this issue with your vehicle.

I will try my best to answer all of your questions.

However, before we get started, please let me mention a few things.

1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.

2. If you dont understand any technical terms or anything that I mention (component tests or theory or operation), please let me know and I will provide you with a more in debt explanation or answer.

3. Please understand that I am here to help you any way I can.

Expert:  AMEDEE replied 4 months ago.

Are you able to take a video of this and send it to me so I can see what is happening?

Customer: replied 4 months ago.
sorry, not able to do a video
Expert:  AMEDEE replied 4 months ago.

Does the instrument cluster go dim when this happens?

Do the anti theft and battery light illuminate just once or blink rapidly?

Customer: replied 4 months ago.
sorry, can't call at this time as i am in work. Can you offer any advice as to what the problem ma be or a direction to go in
Expert:  AMEDEE replied 4 months ago.

Sorry, no I cannot without any further information from you.

I will leave this open for other experts.

Good luck!

Customer: replied 4 months ago.
ok
Expert:  Gunvir Singh replied 4 months ago.

Hello, does the problem occur when engine is cold, warmed up or does not matter?

Customer: replied 4 months ago.
Not sure about cold but it does it when hot
Expert:  Gunvir Singh replied 4 months ago.

Ok,Does it ever cut off or just hesistation?

Customer: replied 4 months ago.
Just hesitate almost to the point of stalling and it does pop thru the intake also
Expert:  Gunvir Singh replied 4 months ago.

I understand the check engine light is not on but have you checke dfor any codes in the pcm?

Customer: replied 4 months ago.
Not yet, i hope to have it checked for codes sometime today
Expert:  Gunvir Singh replied 4 months ago.

There is a service bulletin with a similar issue from manufacture. Similar issues occur with no engine light due to water getting in the pcm connector through the wiper cowl.

Customer: replied 4 months ago.
No water getting into the pcm when last checked, this was sealed prior to purchasing the car
Expert:  Gunvir Singh replied 4 months ago.

How ong has it been since you bought it?

Customer: replied 4 months ago.
Purchased new 2/07
Expert:  Gunvir Singh replied 4 months ago.

When was the pcm checked for water damage?

Customer: replied 4 months ago.
A fewmonths ago when problem first happened
Expert:  Gunvir Singh replied 4 months ago.

Next step is to check if alternator is charging specificatiosn and see if any codes present in pcm.

Customer: replied 4 months ago.
Will check and get back to you
Expert:  Gunvir Singh replied 4 months ago.

Ok.