amgboyw204

I have been running a straight pipe exhaust on my c250 coupe about a year now the car is a bit faster an sounds really good but recently my engine light been coming on every now an then but today I experience something different i get drilling noise from the engine when am driving manually, The faster I go the louder the noise get ,The noise put some kind of pressure on engine Have any one experience this. ( Resonator & muffler deleted )

http://m.youtube.com/watch?v=9v3Hl4y...re%3Dyoutu.be#

Igor1080

You have a leak and its creating a pressure loss from the faulty installation. When you install any kind of exhaust you have to make sure that you tighten the clamps a little while after you install because the lubrication material burns off and it creates a leak. Go have the seals tightened and see if it stops then. PS: theres a reason you have a muffler, this not only keeps the car from releasing harmful gasses into the air and it keeps a certain amount of backpressure. You're better off keeping the stock setup both for the environment and for your car.

AV1

^^^^This !

EvolutionDrock

Did you ever find out what was wrong with your exhaust?

amgboyw204

I took the car to the dealership for service cause it was time for an oil change they check out the problem and found out it was just a miss fire so the updated the ecu. And transmission software after that I haven't experience any problems with the Exhaust