[inderbir]

2000e430 4matic 91000miles

last weekend i did the following

replaced plugs with dealer bosch plat's.

replaced fuel filter

replaced oil=filter( noticed creamy stuff in the oil cap)

air filter was replaced 10000miles ago.

after doing this over the weekend, the car drove very nice, lots of power. smooth.

3 days later car feels sluggish and really need to give her little force to accelerate. cant hear any mis-fires. pls advise what could have gone wrong.

starts and sound's fine,

the brake pads are low, could this be slowing the car down

 

[steve-p]

Have you filled up with gas since the service? Sometimes you can get a bad tank if you're unlucky. I had a car a few years back that would be good after a service but would always deteriorate over a couple of weeks to the extent of stalling at evey junction. It was in the shop on and off for months... until I moved house, and so I filled up at a different service station to the one I always used to use. After that, it was fine - no more problems.

 

[Pete1]

Have talked to a number of people who installed Bosch Plat's and have had performance issues. They went back to non plat's with no problems.

 

[inderbir]

how can you tell if the plugs are wrong, will it misfire badly or minor misfire will cause problems

 

[sosh]

I doubt if the plugs are bad or you got a bad tank of gas. It is possible that you disturbed the MAF sensor while doing the work and they are quite sensitive. The only way to know for sure is to put the car on a Star diagnostic computer and interrogate it. This is done at a dealer. Otherwise you will continue to guess and throw parts at it