Surges while driving, all speeds , more after warmed up , seems like only noticeable in highest 2 gears. has 3.0 durateck dual overhead cam engine. has used engine in it bought car this way . has egr code in it ( low egr flow poss.dpfe) would the secondary throttle butterflies poss. cause this ,any suggestion appreciated
To get suggestions you will have to give details on the engine , make model , efi or carburated , multi point or single point injection and what controls the EGR unit
SOURCE: DPFE EGR Pressure Feedback Sensor Issue - 2001 Mercury Sable
The DPFE sensor is a very common failure on all Ford models. Just have the sensor replaced. Or do it yourself. It is very easy to change you can do it in 10 minutes.
SOURCE: P1401 still after replacing EGR pressure and EGR valve
Yes that is what is wrong the intake manifold is plugged with carbon restricting EGR flow you need to clean out the ports to correct the problem if you run the car to long you will burn the DPFE ( the EGR pressure sensor ) out agian
SOURCE: My problem is finding the DPFE on my 1996 Mercury
Dear FixYa,
Thanks for the past help but at $10-$20 a question keeping my old car running can get expensive. And it would be an abuse of your help to send in a long, multi problem message to get away with one payment. Yes, you are cheaper than going to a commercial garage but the point of using the internet is to find the best and cheapest.
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Thanks,
SOURCE: P0401 code Mercury Cougar 2000. DPFE sensor?
Yes it will. Clean out all the ports for the EGR valve check PCV valve if equipped. Vacuum lines can cause this problem also
SOURCE: DPFE changed out burning smell
Check the fuel system, the pump and the fuel pressure regulator or Mass Air Flow Sensor. Evaporated emissions are the fumes that your fuel gives off. The pollution control system pulls them back into the intake to burn them off when you are running your engine. There is a vacuum line that is leaking between the fuel tank and the sensor that detects this or your gas cap is loose or leaking. It could also be a bad sensor which detects vacuum pressures from the tank. If everything has been check, then check inside the throttle by pulling off your Air pressure Intake then open the throttle by using screwdriver or any tools than can push in one the fuel control line to open, which is attach on the left side of the throttle. and if you look straight inside, you will see three hole. Then look by the bottom and you will see the two hole cover with black burned Oil. This means your fuel mixer (Throttle) is not pushing out air properly it gets clog , and the only way to get out is when you push the Gas peddle which is the burned gas will come all the way out to the Air Intake and it will circulate to any open area. If I was right about this! Your solution is to buy a Air Intake Cleaner or Carb-Throttle Cleaner. with the engine OFF, spray inside the throttle by using the red straw and point it to clean the two black clog hole. then wait for a about10 minutes or more to dry up cleaner after spraying the inside throttle. When you start the engine, black smoke will come out to the muffler. No worry this is normal to the engine, means the cleaner is burning and working to get out. Without cleaning the throttle body, the engine will soon stall, or stop without any giving warning light, because this means your A.C. Pressure Clutch and Idle Pully barring are NO longer working properly and maybe totally wormed out. You may also change the throttle position sensor. and check all your Gas and Oil Intake Hoses for a leak. hope this will help to solve your problem. P.S. You can also spray the Intake cleaner to your Intake Mass Air Flow Pressure Filter before putting it back to the throttle body.
If you have any more question you can email me at [email protected] Take care and Good luck.
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