Just started tonight..I was going down the street and I went to pass someone..half throttle and the thing sounded like it missed like 4 or 5 times..I was like WTF!!! backed off the throttle..went to the bank to get some money and as I sat there it sounded rough, when I put it in gear..about 5 seconds after the engine surged a bit and pulled the car forward. I put it in netral...and then back in gear.. At that point I went down the street tried it again and it did the same thing..sputtered..I was like ohh noo...so I get to the sub shop..take out the HPP+ in the trunk and put everything back to stock..and ordered our sub.I was like okay should be fine now..the tuner put everything back...but halfway home I was getting the same thing..missfires..and couldnt belive it...I did put 89 octane in and was like..thats gotta be it...wasnt running good cus of the 89..I went to the gas station and put 93 in..still the same thing...sounds okay at idle..and normal driving.....but when I get into it a little..then it missfires..any ideas?? this is my daily driver..and need help..I was just crawling out of a finacial hole and now this..I had some extra cash I was going to use for some fun..but looks like the cars going to eat it..
so anyone with help I could really use it! Opti? plugs/wires? coil?
Thanks guys!

 

Like you mention, plugs, wires, coil, you should check first. I don't want to say opti, but it would have to be a suspect, too.

 

its probly the HPP. my friends was bad, screwed up his car really bad.

changed all hte volumes in the cylinders, and made the car think it had 721 lb injectors......... he bought in new for his gears and once he used it for the power program / fuel spark part.

everything went bad

 

okay..thats scarreeeyy...
how did he get it fixed???