Author Topic: 1997 Ford Ranger Question  (Read 1187 times)

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Offline Scoobum

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1997 Ford Ranger Question
« on: September 02 2011, 07:10:16 PM »
My daughter has a 1997 Ford Ranger with the 6 cylinder 4 litre engine. It's throwing two codes...one says it's the EGR and the other is the DPFE sensor. The engine surges and idles all over the place. Anyone know what the DPFE sensor is...and would either the EGR or DPFE cause this surging RPM issue?
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

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Offline SuperSix

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Re: 1997 Ford Ranger Question
« Reply #1 on: September 02 2011, 07:42:06 PM »
Looks like the main function of the DPFE is to trigger an ECM code if there's an EGR issue.

http://www.accuratediesel.com/shop/122.html

"We have personally owned several Ford vehicles, including a Taurus, a Sable, and a Focus that the DPFE sensor failed on. Usually the failure starts with an almost imperceptible surge while cruising. Gradually it develops into an annoying surge and then the check engine light comes on eventually. Checking the code will usually reveal that you have a P0402. Other codes that may appear include P0401, P1400, and P1401. This problem was so bad for a few years that Ford actually put out a bulletin saying that if you had any of these codes and symptoms, don't even do any diagnosis, just replace the sensor!"

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Offline Scoobum

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Re: 1997 Ford Ranger Question
« Reply #2 on: September 02 2011, 07:52:08 PM »
Thanks so much Mark. I'll order one at the Ford dealer here in town tomorrow.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people