Possible causes:
- Fuel filter/pressure regulator (high pressure)
- Kinked/restricted fuel supply line
- TPS voltage greater than 1.1 volts with throttle closed
- Fuel pump inlet strainer plugged
- Fuel pump module
- MAP Sensor (Out of calibration)
- TPS voltage change not smooth
- ECT Sensor (Out of calibration)
- Fuel pump capacity (volume) out of specs
- Other engine mechanical problem
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net]On Behalf Of Jim
Sent: Monday, August 12, 2002 10:15 PM
To: dakota-truck@dakota-truck.net
Subject: DML: Trouble code & Engine Warning Light
Hi
Any ideas about what a check engine light and a P0171 trouble code
indicates? The trouble code search results say this:
"A lean air/fuel mixture has been indicated by an abnormally rich correction
factor."
My 2000 4.7 has about 42,000 miles on her. Mileage has been rather poor
lately compared to 6 months ago. Off by 2-3 miles per gallon on a regular
basis. Truck runs fine other than that. I ordered an 02 sensor for in
front of the cat. Should be here in a couple of days.
Ideas welcomed and appreciated.!!!
Jim Brown
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