Well, to start off I been getting this squeek from my left front brake due to a warped rotor, any ideas how? Secondly i was fooling around with my intake showing it off to some friends and my intake BACKFIRED!!! MY INTAKE BACKFIRED!!! Anyway i drive it for a while no problems, so i go back to my neighborhood and i'm stoped behind some guy parking, Foot on the brake and i cant keep the engine idle. Its jerking as if i'm steping on the gas, RPM's moving from 600-800 with out my foot on the gas. I try to duplicate the problem, nothing. Anyway Now i'm cleaning my intake filter for good mesure. Any idea's, cuz i'm stumped.

 

how do you fool around with an intake?

what did you do?

sounds to me like a vaccum leak. Maybe the backfire blew the hose off.

 

MAS - Mass Air Sensor - see, you feed your car steroids and look what happens -

 

what i ment by fool around with my intake was taping the throttel to make a whooshing sound. Nah i check the mass air, its fine.

 

MAS - Mass Air Sensor is the main problems with mercedes and intakes......doing anything with the intake will give you this problem.....i've heard it by serveral people that have had custom intakes or other brands or what not......

 

when you say you "checked" it, please don't tell me you just looked at it and thought it was good. When it is broken, or messed up, it doesn't look any different lol. The only real way to check if its bad is to take it to get diagnosed. Also, a check engine light doesn't have to come on when a MAF sensor is bad. The MAF would seem to be the easiest explanation for your problems since you have an aftermarket intake. Get it diagnosed, if mercedes says it's the maf, then buy an OEM maf off ebay for $100 or so.

 

one of the disadvantages of having an intake

 

Maybe some of your tape got sucked into the intake

 

what i ment by checked was no check engine. any ideas on the warped disk?

 

you dont need a check engine light

 

warped disc can be many things. driving habits. u live in NYC. and power braking all takes factor in this. get some new discs and pads or get new pads and cut the discs. either way there gonna get worse.

 

you can try having the local autoshop resurface the rotors and see if it will help, otherwise I'd just get new rotors. Also, dunno if you knew, never ever wash the car right after you drove it cause when cold water comes into contact with a hot rotor, it may warp it (reason why I never bring my car to a carwash place).

 

i think i have my dealership to thank for it. everytime i take the car in they wash it. regardless, i'm not guna fix it. i gota take care of my family for now. dads really sick, just got the bad late night phone call from the docter. more cancer. this time the doc said he can only buy him time. damn. i just threw away all of tobaco etc, just, i wish there could be more time.

 

It does sound like a manifold (vacuum) leak. A backfire through the intake can easily blow off a vacuum line or other vacuum connection which would cause a higher, rough idle.