1996 Ford Crown Victoria

Engine Mechanical problem
1996 Ford Crown Victoria V8 Automatic

Recently took car in to mechanic because check engine light on. Mechanic stated needed new dpfe. Had that done. A few days later after retrieving auto from mechanic check engine light came on again. Took auto back to mechanic. Retrieved car from mechanic and about a day later, the check engine light came on again. I took my car to the ford deailer for a recall today and they did confirm that a new dpfe (egr valve) was put in. (Asked them to check this for me as a courtesy so they did) I thought the 2 weekends I left my automobile with the previous mechanic that no work was even done, but that is another story.

Had a pcm reading at 3 places. Here is their finding: The pcm has determined that there is insufficient flow in the exhaust gas recirculation system.

What do I do next. Thank you for any and all responses.
Do you
have the same problem?
Monday, April 7th, 2008 AT 5:29 PM

1 Reply

The EGR system recycles the gas through the upper intake. On your vehicle, that upper intake is the aluminum elbow on the back of the engine. Underneath that elbow are two passages that divert the EGR gasses through the intake. These plug up with carbon. You need to remove the upper intake and scrape out the carbon. Use a shop vac to suck out the debri instead of letting it into the intake. Install a new upper intake gasket and clear the codes. I have had to do this a lot on the older 4.6 engines. We always replace the DPFE in conjunction with the cleanout, but since yours was recently replaced you will not need to replace it again.
Was this
Monday, April 7th, 2008 AT 10:11 PM

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