Question regarding P0171 & P0174
Thread Starter
Melting Slicks
Joined: Nov 2005
Posts: 2,297
Likes: 156
From: Clayton New Jersey
Question regarding P0171 & P0174
On my 2000 Coupe, MN6, I've installed the following mods:
Ported throttle body ( installed about 2 months ago)
Ported GM MAF sensor (installed last week)
VRB 2 air intake (installed about 6 months ago)
Yesterday, the check engine light came on after about a 50 mile drive. I checked the codes and then reset the light. P0171 Fuel sysytem lean bank 1 and P0174 Fuel System lean bank 2. Should I go back to the stock MAF & Throttle body? Vette seems to pull harder with these parts in place. Throttle response is improved but I think I'm leaning out at higher RPM's
I have the hand held Predator and I can go in and change the fuel settings. Any idea's would be appreciated.
Thanks, Bill
Ported throttle body ( installed about 2 months ago)
Ported GM MAF sensor (installed last week)
VRB 2 air intake (installed about 6 months ago)
Yesterday, the check engine light came on after about a 50 mile drive. I checked the codes and then reset the light. P0171 Fuel sysytem lean bank 1 and P0174 Fuel System lean bank 2. Should I go back to the stock MAF & Throttle body? Vette seems to pull harder with these parts in place. Throttle response is improved but I think I'm leaning out at higher RPM's
I have the hand held Predator and I can go in and change the fuel settings. Any idea's would be appreciated.
Thanks, Bill
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
...double check all of your clamped connections for possible air leaks first. Some are hard to spot, especially if it's at the very bottom of the throttle body to (after market rigid silicone?) bellows.
I had one that drove me nuts and only found a pucker of the bellows with a small mirror.
I had one that drove me nuts and only found a pucker of the bellows with a small mirror.
