Car is Sputtering

[frostburn]

Ok... well i was having the same problem... i changed my plugs and did all that garbage jobs trying to figure it out... so me and my uncle took it down the highway and he told me to open it up.... with over drive on... so i did... the car jolted horribly in a sputtering scense then i let off and he told me to take off over drive so i did and floored her again... this time the hesitation was still there but at a minimum... turns out my head warped... so i got gunk block sealer... lotta bull shit work again... draining the rad 8 times with cleaners than gunk but.... i let it sit for the required 30 mins when i was done... fired her up... car ran better idle was 600-650 rather than my normal 900-1000... gas mileage feels better car sounds alot quieter and most importantly i can floor her again without the sputter... this stuff totally fixed everything... its only a quick fix but my uncle says he using it on his race cars and its amazing stuff can last anywhere from a year up... give it a shot if u have the time... and around 80$ for cleaner gunk and antifreeze!.