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Chris (aka- Moose)
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 39866
Experience:  16 years experience with Mercury
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2000 Merc Grand Marquis had misfire on # 2 cyclinder. replace coil & boot. Misfi

Resolved Question:

2000 Merc Grand Marquis had misfire on # XXXXX cyclinder. replace coil & boot.
Misfire went away. The in mode 6 TID 26/ 2a/2b showed up. What next?
Submitted: 4 years ago.
Category: Mercury
Expert:  Chris (aka- Moose) replied 4 years ago.

Hello, I'm Chris.
I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.


Do you still have a misfire?

Is it storing any fault codes?

Is the check engine light on or flashing?


Customer: replied 4 years ago.

No misfire now


The only code it had was for a misfire on cyclinder #2

Replaced coil & boot with new


TID 26, 2A & 2B


No check engine light


car has had a drop in fuel economy

Expert:  Chris (aka- Moose) replied 4 years ago.

Mode 6 data is a collection of if I recall the number correct, the last 400 starts so if you had a concern at any point in the past 400 starts then its going to show up on mode 6. Most techs do not even use mode 6 data because its not all that helpful in diagnostics.


If you just a coil fail then I assume you have high mileage. In that case make sure you have done a tune up using motorcraft plugs. Since the car is not telling you there is a concern via the check engine light then i would not suspect a engine issue at this time but recommend these below steps.



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Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 39866
Experience: 16 years experience with Mercury
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