5.5 gen max...questions on running rich

[Dynamic]

I purchased HS headers last year when they were going for $300. I finally got around to installing them this saturday. I bought a VAFC2 and its installed, just not tuned yet. Right now the car seems a bit sluggish, Im guessing b/c its not tuned yet.

Here is my concern:

- I wont be able to get the car tuned for another 3 months or so and Im scared Im running rich. My friend installed the vafc 2 and I totally forgot what he set the crossover point at. But to be sure the car does not run that rich I keep rpms at 2-2.5k when I shift. From what I researched most maximas run rich at higher rpms. So by shifting at 2k or so will I somewhat prevent the extra carbon deposits from running rich? My MPG actually got .1 better since the headers were installed (shifting at 2k) so I dont think Im running that rich at that specific rpm.

My other mods are megan racing catback and test pipe. Stock intake.

[Dynamic]

anyone?

[Sentientbydesign]

Is it possible that your improved fuel economy is from the low rpm shifting and not the headers?

[Dynamic]

Is it possible that your improved fuel economy is from the low rpm shifting and not the headers?

well my driving habbits never changed and I always shift around 2k...so I would say no

[Fezzik]

You should be fine until you get the car tuned. After I did the test headers for Cattman and did the test dyno my a/f was all over the place. In the end i was running rich and I still am. I havent had time to tune it better. You can get pretty lean with these engines but just make sure you have a nice a/f line when you dyno.

[Dynamic]

You should be fine until you get the car tuned. After I did the test headers for Cattman and did the test dyno my a/f was all over the place. In the end i was running rich and I still am. I havent had time to tune it better. You can get pretty lean with these engines but just make sure you have a nice a/f line when you dyno.

cool thanks man