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Kari

Kari 8/2/2017

2004 Mercury Grand Marquis GS 8 Cyl 4.60L

Engine

Engine running rough/bogging

Check engine light came on and it was bogging
bad. Took it to AutoZone got running lean in 1 & 2. The
paper said to replace spark plugs and coil packs.
Did that plus threw in some Lucas injector cleaner.
It is still doing it. Help!

4 Answers


Jimm

Jimm 8/2/2017

First question - what is/are the specific fault codes retrieved? What are the numeric codes?

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Kari

Kari 8/2/2017

I will see if I can find the paper. If not I will bring it back up to AutoZone.

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Miked

Miked 8/3/2017

Those are common to have vacuum leaks at the intake gasket

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Kari

Kari 8/3/2017

He ended up cleaning some things fixing a hose from the throttle body to the pvc valve. It still was doing it. He cleaned some sensors re-tightened a few hoses and it is running great again!

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