i have a 2000 camaro ss auto with longtube headers slp intake and catback with 8.5 spark plug wires.It dynod b4 tune only 221.63 hp which sounds really low.after tune it dynod 299.58.they told me it was still throwing a code bc the main o2 sensor needs replaced.Are these accurate or did i get ripped off

 

ya you should be up around 300 stock

 

Sounds extremely inaccurate.

 

i just went on a drive and my check engine light came on again. they gave me this handheld thing with no directions.It still idles low n rough when im stopped,sounds like it going to cut off.

 

idk wht the problem is.could the o2 sensor be throwing things off.Its a sct xcalibrator handheld tuner they gave me

 

from what im reading those tuners are for fords

 

it says gm on it.i tried pluggin it in and using it and it keeps saying error.idk wht is going on

 

O2 sensors tell the computer where the fuel mixture is at. With bad O2 sensors your computer is flying blind. You wasted your money on the tune because there is no way to tune a car if the O2s are not working right. Even if the Dyno had a exhaust sniffer that would be after Cat and not accurate.

Replace you O2 make sure everything else is working in good order then get it tuned again. If your not sure about the age or the condition of your O2 or any other maintinence item on your car you should replace it BEFORE you get it tuned. Tuning a car with a bad Cat, plugged fuel filter, worn out plugs and any other issue is just a waste of money.

 

i knw i tool it to a shop bc of idleing issues the guy told me nothing they can do and tht i had to get it tuned to fix my idleing issue.600 bux later still idleing the same

 

you need cats