Hello, I im having problems with my 87 turbo reving up and down. If i depress the gas pedal slowly, when i hit 1500 rpms it starts reving up and down until i give it enough gas to get to about 2500. It does this very consistent, it is not an on and off problem. I have a Maft pro installed. Could this be a problem in my tuning, or is it a faulty part like a tps, or idle speed control, or cps?? Any help figuring this out will be greatly appreciated because i will be using it for a trip from Idaho to California soon. :icon_surpThanks