Running RICH
Thread Starter
Burning Brakes
Joined: Jan 2007
Posts: 1,152
Likes: 3
From: Hawaii
Running RICH
I'm hunting down solutions. BESIDES a "tune", what would cause my '98 - A4 to run rich? I am constantly receiving codes 172 & 175 (left & right cyclinder banks running rich) on my DIC. Average milage dropped from 23 to under 15.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
Since both bank are rich, it would seem to rule out the O2 sensors. Here's a couple things from the manual:
Visually/physically inspect the following items:
Collapsed air intake duct.
The air filter element for being restricted.
MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
For excessive fuel in the crankcase. Change oil as necessary.
Visually/physically inspect the following items:
Collapsed air intake duct.
The air filter element for being restricted.
MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
For excessive fuel in the crankcase. Change oil as necessary.
Thread Starter
Burning Brakes
Joined: Jan 2007
Posts: 1,152
Likes: 3
From: Hawaii
[QUOTE=87SAM;1569599676]Since both bank are rich, it would seem to rule out the O2 sensors. Here's a couple things from the manual:
Visually/physically inspect the following items:
1) Collapsed air intake duct.
2) The air filter element for being restricted.
3) MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
4) For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
*********************************
That's in the owner's manual, huh? THANKS! It's a start.
Visually/physically inspect the following items:
1) Collapsed air intake duct.
2) The air filter element for being restricted.
3) MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
4) For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
*********************************
That's in the owner's manual, huh? THANKS! It's a start.
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
[QUOTE=HawnHog;1569605008]
No, it's in the service manual. Pick one up for yourself, it's full of useful information.
Since both bank are rich, it would seem to rule out the O2 sensors. Here's a couple things from the manual:
Visually/physically inspect the following items:
1) Collapsed air intake duct.
2) The air filter element for being restricted.
3) MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
4) For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
*********************************
That's in the owner's manual, huh? THANKS! It's a start.
Visually/physically inspect the following items:
1) Collapsed air intake duct.
2) The air filter element for being restricted.
3) MAF sensor for being installed in the proper direction and for foreign objects blocking the inlet screen.
4) For fuel in the pressure regulator hose.
Check for the incorrect MAP/BARO display.
*********************************
That's in the owner's manual, huh? THANKS! It's a start.
