need help
Also when i'm slowing down my car wants to cut off it cut off on me once but started back up


i have a 98 E320 4 matic with 200.000 mil ther is also a rattle coming from the bottom of the car when i slow down or when i put it in park and rev it 



please help drive smooth again




there is a batch of them in the normal under hood fusebox
some in the side of the dash under a plastic flap/cover
some under the back seat by the battery
and less relevantly the ones inside the fake AC box.. under the hood
just incase you missed any
wow didnt know there were that many fuses in that car.There is a click coming from one of the relays when u put ur hand on it and turn the switch in side on u feel that click on the relay
i swaped the relays around and that didnt work 
Do you have a rough idle? Or a rough vibration when accelerating? That can be the engine mounts.
If your mounts are good, the stall could be just your CPS.
no rough idle when i slow down or speed up it's smooth only when i rev it up sounds like rocks or something no vibration when i speed up well a little but i think i need to rotate my tires
i think its the cats it has cut of on me once but stared right up
hasn't cut off sence
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i was thinking of cutting of the cats a replacing them with after market ones not oem would any one recomend that or should i just replace the whole exhust with oem parts and oem cats 

i want my exhust to be a little lauder but not like a rice rocket 
any sugetions
maybe a muffler upgrade
or i could just cut the cats out run a pipe insted of cats will that be to loud
i hope thet takes care of the rattle
i want my exhust to be a little lauder but not like a rice rocket 
any sugetions
maybe a muffler upgrade
or i could just cut the cats out run a pipe insted of cats will that be to loud
i hope thet takes care of the rattleAlso, do yourself, your neighbors, those driving near you, and the environment a big favor and keep quality cats and mufflers on your car.
i will check for a lose clamp hope thats the problem
i dont mind if the exhust gets little louder i like clean air too

IMO you can't make a v6 sound like a v8. All v8's have a unique sound because they fundamentally have mod8 frequency modes. (not all v8's sound alike, but they all sound similar to each other in a way that is different from any other engine... likewise all v6's will have a similar characteristic sound). A v6 will always sound like a v6 to anyone who knows what to listen for. You can make it louder, you can muffle high frequencies more or muffle low frequencies more (changing the "color" of the sound) but you can't change the fundamental character of the sound, since it's still a v6... IMO.



