Keeps Throwing Codes

[CHEVROLADE]

WELL I RECENTLY HAVE A MAIL TUNE FROM NP.THIS IS ON MY BLOWN 08'4.8 GUYS,AFTER 3-4 RUNS,ENGINE LIGHT COMES ON.IT BACKFIRES SOME TIMES.I MEAN IT RUNS GOOD,I GET ON IT EVERYDAY,NO KNOCKING OR PINGING.BUT HERE ARE THE CODES-

Po171-fuel Trim Bank Condition

Explanation-the Pcm Uses The Oxygen Sensor To Calculate The A/f Ratio Of The Engine.the Computer Has Recognized A Rich Or Lean Condition On One Engine Bank Only.

Po174-fuel Trim Bank 2 Condition

Explanation-the Ecm Has Detected A Rich Or Lean A/f Ratio Condition on bank two.


So should i take it easy for now ,till i get a live tune.what am i risking?

[GasGuzzler]

It's a MAF tune with boost. Those are lean codes for both banks. May need a MAF solution or a SD tune. Anyone else?

[Sleaper]

Do you have a wideband? What is your A/F ratio while in boost? Should be 11.5 or lower. Could be O2's going bad...

[CHEVROLADE]

Well Im Looking Into Getting The Wideband This Week From Np.

I Have My Cat Converters Removed,so Allen Deleted All The O2 Sensors .unless They Still Read??

[Sleaper]

Did he delete all of the o2's or just the rear's? I would definitely take it easy until you got a wideband hooked up. At ;east then you will be able to see what it's doing.

[CHEVROLADE]

Did he delete all of the o2's or just the rear's? I would definitely take it easy until you got a wideband hooked up. At ;east then you will be able to see what it's doing.

im really not sure,ill have to ask him.

i get on it everyday,wouldnt it have broken already?lol

[Sleaper]

I've got a lot of confidence in NP mail order tunes since that's what I had for a year with my set up. The wideband is just to double check and make sure that everything is in check. Since those codes are for being too lean, I would be very careful about getting on it. Just because it hasn't blown yet doesn't mean it won't. What size injectors do you have? Fuel pump? Do you have a narrow band or anything to monitor AFR?

[CHEVROLADE]

I've got a lot of confidence in NP mail order tunes since that's what I had for a year with my set up. The wideband is just to double check and make sure that everything is in check. Since those codes are for being too lean, I would be very careful about getting on it. Just because it hasn't blown yet doesn't mean it won't. What size injectors do you have? Fuel pump? Do you have a narrow band or anything to monitor AFR?

SAME HERE THATS WHY I WENT WITH HIM.
I HAVE NOTHING TO MONITOR MY A/F RATIO
THE INJECTORS,WHATEVER COMES WITH THE 112 RADIX MAGNUSON42-44?
AS FOR FUEL,STOCK FUEL PUMP WITH MAGNAVOLT FROM CHARGER KIT.
IM ONLY AT 5-6PSI,IM ALSO RUNNING TR6NGK

[Sleaper]

It may be something minor and no big deal but better to be safe than sorry. I'll let some of the other guys chime in on what their thoughts are. Good luck!

[CHEVROLADE]

It may be something minor and no big deal but better to be safe than sorry. I'll let some of the other guys chime in on what their thoughts are. Good luck!

HEY MAN THANKS ALOT.YEA I BETTER BE SAFE,I ONLY HAVE 4500 MILES ON IT-LOL