Aftermarket header p1133/p1153

[ST1LE]

It isnt good for your engine to run with such drastic changes in air/fuel ratio, that was the reason for my response, not the HP gain as you are right it is minimal.

Originally Posted by matt55

A tune made VERY little my intake/header car(5-10hp) . Ran it for 2 years no tune, if it wasn't for the darn cel I would left it alone .

[styphon]

Originally Posted by 3rdgen3

Such is life.

-Street Racing is illegal
-Smoking indoors is illegal
-Doing burnouts is illegal
-Speeding is illegal

What isnt illegal? Where do you stop with the morality of it all?

The bottom line is, if you want to keep LT's and pass inspection, you'll need a tune.

Just as an FYI, because THAT tuner told you "tuning out 1133 and 1153 is illegal" would ensure i never let that guy EVER tune my car. This is a COMMON issue with having longtubes/modified exhaust/cats/etc.

With a proper tune(r), they will FORCE emissions readiness in the tune. HP Tuners, EFI Live, etc all have the ability to do this and tell the ECU to not trip a CEL/Fault for P01133, P01153, P0420 & P0421. Any good tuner should know this.

They wouldnt put the feature in the tuning software if it wasnt required when tuning for certain/specific mods, like longtubes.

I thought that was wierd - he was acting like I was asking him to violate sacred laws. He suggested I "pay him the fine + tuning costs" "just in case"

Taking your advice, I called another tuner that is about the same distance away - he uses HP tuner software - and I played dumb about the codes. He seemed to realize that you have to "lower the sensitivity" of the sensors to prevent these codes. I think I am going with him.

[ST1LE]

Originally Posted by styphon

I thought that was wierd - he was acting like I was asking him to violate sacred laws. He suggested I "pay him the fine + tuning costs" "just in case"

Taking your advice, I called another tuner that is about the same distance away - he uses HP tuner software - and I played dumb about the codes. He seemed to realize that you have to "lower the sensitivity" of the sensors to prevent these codes. I think I am going with him.

Glad you got a better response from the second guy. Sad some people represent themselves as something they arent. Good luck man!

[christianchevell]

yes you do have to change it in the tune to be less sensitive as my tuner said the sensitivity from like 2012 up was tuned up on the ECU..thus I threw those codes after 40 miles, and it took him 30 seconds to fix the issue with his h.p. lap top tuning software.

[matt55]

Originally Posted by ST1LE

It isnt good for your engine to run with such drastic changes in air/fuel ratio, that was the reason for my response, not the HP gain as you are right it is minimal.

Drastic ?
The a/f were in the 12's pre tune , the graph is just expanded to see the a/f better.