eyelids
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#8
after 2 maf sensors installations, im still popping code p0171 (lean), so all my mods dont do anything.
put back my stock air box, but a hose still gives me cold air from the front bumper opening.
underdog crankshaft pulley
cat sensor back 2.5" magnaflow muffler and piping
ground wire kit
i really hate that CEL!
put back my stock air box, but a hose still gives me cold air from the front bumper opening.
underdog crankshaft pulley
cat sensor back 2.5" magnaflow muffler and piping
ground wire kit
i really hate that CEL!
#9
Super Moderator
I wonder if you have a crack, even small one or some sway/expansion/contraction in the joint areas on your exhaust that could be allowing in some extra air by the A/F sensors, causing a lean.
#12
Super Moderator
#13
Pole Position
#14
hahaha! since the eyelids gives me an extra 5+ hp, its useless if the p0171 lean CEL still pop up. so to fix this problem i need check if i have an exhaust manifold leak.
edit:
i checked the areas around the sensors and no hot air was coming out. however there was hot air coming out of the (radiator side) precat's crack, which was welded to stop the rattling. i think this location is bank 2, but the p0171 is lean bank 1.
is there ever a CEL p0171 lean back 2? it seems like everyone is getting the bank 1 lean.
edit:
i checked the areas around the sensors and no hot air was coming out. however there was hot air coming out of the (radiator side) precat's crack, which was welded to stop the rattling. i think this location is bank 2, but the p0171 is lean bank 1.
is there ever a CEL p0171 lean back 2? it seems like everyone is getting the bank 1 lean.
Last edited by zombie; 06-06-07 at 01:33 PM.
#15
Pole Position
P0171 is bank one (close to firewall) lean. Have you replaced your knock sensors? They won't give a CEL until both of them go bad. You can check the resistance from harness of ECM. I replaced them (also replaced all sparkplugs and coolant bypass pipe under lower manifold) on my own. It took ~10 hours.
Last edited by Meetya; 06-06-07 at 01:53 PM.