I had my NWP spacers plus the racingline precats and y-pipe installed last week. When I drove it off, I could really feel the difference as the car just screamed off the line and really pulled north of 4-5K.

One of the things I did notice was that at idle I was making 1100 RPM. And of course after about 50 miles of driving, a CEL appeared. I pulled the code at home which was a P0507.

Normally I probably would have let this go, but I needed to run my car through emissions so I performed the idle relearn manual reset, which took me about 45 minutes to get the timing and the sequence correct. But it all worked and RPMS dropped to the low 700's at idle.

My problem, or maybe it's not a problem, is that the car doesn't seem quite as peppy off the line or through the band. Now that I've passed emissions, is there any way (outside of a tune) to "unlearn" the idle? Does anyone know of someone reputable in AZ that could do a tune?

Thanks in advance

For what it's worth.....I also have a Fujita CAI installed too. 06 SE. No other mods besides the CAI and stuff I mentioned above.

EDIT**** I have 150,000 miles on the car and just replaced the plugs as well.

 

I believe what you are experiencing what is called losing low end torque, thats usually the downside of spacers, CAI. Upside, you gain power on high end. You basically lose a little on the lower rpms, but when you hit higher RPM, you will take off.