Thread: Need some help

i dont really know what is going on with my car its getting really crappy miles. when i try to adjust the timing and set it to stock i get backfire from my intake, wondering if anyone one in IL can check out my car that is more experienced in them. i dont want anything to happen to it.

crappy miles -

spark plugs, wires, o2 sensor....

can you put your timing back to stock if you tuned it with the safc for advanced timing? just a question.