Copied and pasted from another forum!
Hey guys, I’ve got a '98 Audi 1.8T that I wanted to get more performance from and was recommended to port and polish the intake and exhaust. I did a little research and found out abrasive material is used to do it a lot of times–like gritty sand. So I got with my friend who tunes Hondas and we decided to try it ourselves. We got a bag of sandblasting sand and hooked it up to the intake of the car and started it up. We wanted to let the engine suck in the sand through the intake so it would port it out and then push it out the exhaust so it would port the exhaust manifold. I was worried that it might cause problems but my friend told me it would be okay as long as we didn’t make boost and it get sucked in the turbo. After letting the car suck in about half the bag of sand, the check engine light came on and the engine started bucking and kicking and sounding really weirdWe stopped and hooked the car back up normal and took off the sand supply. We tried to start it again and it was really hard. Once started it couldn’t idle and kept making weird noises. We took it out and drove it and it started to make scraping and knocking noises. Help! Can anyone tell me what to do! My buddy only does Hondas so he doesn’t know much about Audis.
