i have a egr flow problem . i have change the erg valce. what can be wrong?
2006-08-31 13:08:15 · 6 answers · asked by madmaxvx23 1 in Cars & Transportation ➔ Maintenance & Repairs
More than likely you will need a Delta Pressure Feedback Exhaust sensor, or DPFE. This measures the amount of exhaust gas returning through the EGR tube. If you remove the black plastic cover on the top of the engine that has 4.6 or 5.4 stamped on it. It is a silver box shaped unit just to the right of the throttle body about 2 in. x 4 in., with two hoses running off of it to the Egr tube that connects to the Egr valve. These sensors go bad alot on the Fords. This will cause a check engine lamp, with P0401 or P0402 codes, insufficient Egr flow, or Excessive flow at idle. If you stop by the dealer parts counter the basic part number for the sensor is 9J460. It will cost around 75 bucks.
The EGR system is not useless, the EGR gases allowed back into the combustion chamber not only lower emissions, but also cools down combustion chamber temperatures, which in turn produces more power and better fuel economy.
2006-08-31 13:47:05 · answer #1 · answered by yugie29 6 · 0⤊ 0⤋
The black colored electrical sensor on top of the EGR valve may be the problem Providing the valve moves when some one guns the gas with foot on the brake for one or two seconds. If you cannot feel movement of the diaphram thru the holes underside of the valve there is a vacuum problem. Push up on the diaphram engine should not like exhaust at idle and die = flow of exhaust is good. On some fords there is a DPFE sensor that checks the egr by exhaust back pressure connected to the exhaust with two metal pipes and silver or black sensor with two high temp rubber hoses. These are known to cause egr flow codes. But when you ask us auto Yamsters you have to tell us year and engine size. To help you better.
2006-08-31 13:20:09 · answer #2 · answered by John Paul 7 · 0⤊ 0⤋
You didn't state a year or motor to help out....
John Paul and Yugie are correct about the sensors usually causing the check engine light....
On some (mainly 97 MY and newer v8s), the ports in the intake get plugged up after about 100k miles and will not flow EGR gases and will set a code even with a new DPFE sensor... easiest way to diagnose is to pull vacumm from something like the fuel pressure regulator and hook direct to the EGR.. If truck stalls or runs extremely rough, the EGR is fine and suspect a DPFE only... if not running rough, It's time to clean and change the DPFE (these sensors had lots of issues with new revised ones out currently that are supposed to cure the contaimnation issues that were so problematic with the original sensors)
2006-08-31 16:11:48 · answer #3 · answered by gearbox 7 · 0⤊ 0⤋
EGR is a waste of resources. Take off the vaccum line, plug the vaccum line with a screw and your problem will be solved. OR, you can go buy an EGR cover plate and take it off completely. Then put the plate on the intake. I think they run 10 bucks. The egr is pretty useless. Since their introduction in the early 70's they've been nothing but trouble. Good luck.
2006-08-31 13:47:05 · answer #4 · answered by jeff s 5 · 0⤊ 1⤋
well an engine size would be nice but i bet its the egr sensor (not correct name) and not the egr. ford had alot of problems with them in the 90's
2006-08-31 13:18:10 · answer #5 · answered by Christian 7 · 0⤊ 0⤋
JOHN PAUL IS THE MAN ON THIS ONE.
2006-08-31 13:53:27 · answer #6 · answered by tadams 2 · 0⤊ 0⤋