Lean codes p0171 & p0174

02impactblue · 07-31-2005, 06:06 PM

I've had P0171 & P0174 codes (lean condition bank 1&2) come up 3 times in the last 500 miles, usually after hard runs. The only mods on the car is a Halltech Stinger intake that has been on for 5000 miles. I also noticed a little surging during 2-4 k rpms when cold and not as noticable when warm. Any idea whats going on? Is it really running lean?

yelloyello · 07-31-2005, 07:11 PM

It probably is running lean or your sensors are bad. Get it checked out

Rob'sC5 · 08-01-2005, 10:42 PM

make sure there are no leaks around the TB...after those hards runs a clamp might have slipped allowing more air than required

02impactblue · 08-02-2005, 09:16 AM

I found one of the clamps at the tb very loose and I tightened it thinking that was the problem, however the next time I took the vette out it threw the codes again after jumping on it. Does it have to relearn after getting more air via the leak?

Rob'sC5 · 08-02-2005, 09:10 PM

yup. Do a Idle relearn and see what that does for ya....Try the simple stuff first

quimbo · 08-06-2005, 04:56 PM

I would say you are sucking air somewhere check all your clamps on your intake make sure the collar going to the throttle body is on flush all around. I have seen this happen before if its not flush all around you will suck air and throw codes. Just my2 cents

QUIMBO

SEEYAAAH

02impactblue · 08-13-2005, 02:37 PM

All air leaks are fixed and no codes. The air duct was leaking at the maf and the throttle body. Everything was nice and tight when I installed it a year ago but i guess constant changes in temps and vibration caused it to work loose.Thanks for your help.