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

[George C]

just cause its not broke doesnt mean it wont break.

IMHO a mail order should only be used as a base

[CHEVROLADE]

UPDATE:
ill be getting my gauge tuesdaythanks to melissa and nelson performance