Climbing RPMs and codes
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New User
Joined: Sep 2009
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Climbing RPMs and codes
On my '04 Ranger, when I start it, it goes to aroudn 2000 rpms and hangs there. In fact when I let off the clutch, it really takes off w.out me having to even use the pedal! I thought this was just because it was cold but even after driving 20 miles, when I put in the clutch, it stays around 2k and sometimes even wanders toward 3k.
Last night the CEL finally came on so I had the local shop put the computer on it. It gave codes:
P0171 System too lean Bank 1
P0174 System too lean Bank 2
The shop wasnt completely sure what this meant so reset it and wants to see if they come back.
Can anyone here tell me what those codes are and what should be done/replaced? Is this most likely my rpm problem??
Thanks
D
Last night the CEL finally came on so I had the local shop put the computer on it. It gave codes:
P0171 System too lean Bank 1
P0174 System too lean Bank 2
The shop wasnt completely sure what this meant so reset it and wants to see if they come back.
Can anyone here tell me what those codes are and what should be done/replaced? Is this most likely my rpm problem??
Thanks
D
Elder User
Joined: Nov 2008
Posts: 668
Likes: 6
From: Northfield, MI
The combination of high idle speed and the engine running lean on both banks would probably indicate a vacuum leak. Check all of the vacuum lines, including the PCV system. You may even be able to hear the leak at idle.
Thread Starter
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New User
Joined: Sep 2009
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The CEL came back on last night after about 8 miles.
I'll pass this info on to my garage. They did mention possible vacuum issues and now that you mention it, when I walked by it the other day at idle it did sound funny, something I hadnt heard before.
Thanks for the info guys! This is a great site, such a resource!!
D
I'll pass this info on to my garage. They did mention possible vacuum issues and now that you mention it, when I walked by it the other day at idle it did sound funny, something I hadnt heard before.
Thanks for the info guys! This is a great site, such a resource!!
D
Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
P0171: System to Lean (Bank 1)
P0174: System to Lean (Bank 2)
The Adaptive Fuel Strategy continously monitors fuel delivery hardware. The test fails when the adative fuel tables reach a rich calibrated limit.
Possible Causes:
For lean and rich DTC's
Fuel system
Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or runninng out of fuel
Vapor recovery system
Induction system: including Air leaks after the MAF, vacuum leaks, PCV system, Improperly seated engine oil dipstick
EGR ststem: including Leaking gasket, Stuck EGR valve, Leaking diaphragm or EVR
Base Engine issues: including Oil overfill, Cam timing, Cylinder compression Exhaust leaks befor or near the HO2Ss.
P0174: System to Lean (Bank 2)
The Adaptive Fuel Strategy continously monitors fuel delivery hardware. The test fails when the adative fuel tables reach a rich calibrated limit.
Possible Causes:
For lean and rich DTC's
Fuel system
Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or runninng out of fuel
Vapor recovery system
Induction system: including Air leaks after the MAF, vacuum leaks, PCV system, Improperly seated engine oil dipstick
EGR ststem: including Leaking gasket, Stuck EGR valve, Leaking diaphragm or EVR
Base Engine issues: including Oil overfill, Cam timing, Cylinder compression Exhaust leaks befor or near the HO2Ss.
