SOURCE: Ford F250 EGR problem
The EGR valve (Exhaust Gas Recirculator) provides a path from ******** to nose of your engine, returning some of the exhaust fumes to the intake to supposedly improve tailpipe emissions.
Uh huh, I agree. Seems like a stupid idea and each car I have cheated (that couldn't tell I was cheating) has gained a little on gas mileage but never as much as 10%.
Your Ford apparently has a sensor to rat you out if you cheat it so the quantity of fumes isn't satisfying that sensor.
This could mean that the EGR is clogged (it's a small hole passing dirty exhaust fumes), failed, or the vacuum line that controls it is cracked or otherwise broken.
SOURCE: eobd code 4010 insufficient flow to egr valve on 2001 ford maveri
dpbeffe sensors on fords are a common problem I had the same issue with several fords of same year new sensor from ford only cost me 38$ from ford just make sure both tubes to dpfe are clear though any blockage screws up the reading from the sensor
SOURCE: Taurus SHO wont pass emissions: 95 Taurus SHO
If the fuel regulator is seeping gas, replace it first. There is a good chance the diaphragm has a hole in it and is feeding fuel through the vacuum line directly to the intake, causing extremely rich fuel mixture. (Hence the strong exhaust and burning eyes) As a matter of fact, if you pull the vac line off and turn on the key, I bet fuel sprays out. Be careful not to start a fire on a hot engine. Once you get this repaired, erase the codes and retest. You could find yourself with only one code, maybe even none. I wish you luck. Emissions can make you pull your hair out.
SOURCE: got a code 401 EGR insufficient flow. so i changed
Your problem may be with another component of the EGR system. It is the Delta Pressure Feedback EGR sensor and it is know to have problems. The sensor is connected to the EGR valve by the two lines coming off it. If you do a image search for DPFE Sensors on your make and model you can get an idea what it look for. It may be tucked back behind the intake and firewall. Also check all the hoses connected to it. A vacuum leak could aslo be at fault.
Because Ford has had a lot of problems with these, it is possible that it may even be under a recall so check with a ford dealer before spending any of your own money.
Hope this helps.
This means either the EGR position sensor hose is pulled off or damaged or the sensor is defective. The sensor is referred to as the EGR (exhaust gas recirculation valve) DPFE sensor.
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