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P0174 System too lean (Bank 2) lean condition on side opposite bank 1
I ran another test. On the road, without being able to accelerate beyond just feathering the accelerator to accelerate very slowly, I floored it and the engine speed did not change significantly, didn't go up or down. Thought that maybe it didn't go down because of the transmission still being in gear so I shifted to neutral. The engine still held at the same RPM, even though it was in neutral (no load) and the accelerator was floored.
Here's what has been replaced.
- O2 (all four)
- TPS
- MAF
- Air filter
I really need the help,the dealer's here in Vermont are no help.
Thanks
George :sick:
hose and put your finger over the end of it,have someone start the engine, if it runs
smooth, replace the Mass Air Flow sensor !
Ford has the same problem !
If this does not help, replace lifters that are tapping ! Make sure it is not a
spark knock, caused by off timing or you are using low octane gas, when your
not suppose to !
Good Luck
does it idle rough in neutral or only while in gear/rolling?
if rough idle in neutral, does it smooth out when you remove oil filler cap? if yes, maybe intake manifold gaskets & RTV-sealant? (even a good MAF can't adjust for an intake leak?)
these are longshot ideas from an earlier GM V8s, maybe not relevant to your 5.3, but just in case... :shades:
I have a 2001 Chevy Silverado 1500 5.3l 4x4. I am have issues with the engine missfiring. The computer is telling me that I have cylinders 5, 7, & 8 misfiring. I also have fuel coming out of the exaust. Today I have replace all of the plugs. I still had the same cylinders misfire. Then I switched cylinder 1's wire with cylinder 8's wire and still the same missfire codes. Then I swapped coils with 3 & 5, but still we have misfires on 5, 7, & 8. I then checked power to coil #5 at the power harness and we have 14.6v. Do you have any suggestions from here?
http://www.obd-codes.com/p0300
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