Joeyc220

I have a 1995 c220 with 100k on it....4 weeks ago i hosed off the engine and the car bogged out and died on me....found out it was the wiring harness on it and it burned....changed that and the wires that go under the intake manifold and the wiring harness to starter and tranny. this was all done at a shop for $1200. now i get the car back the idle is going up and down, it has like no power, and i feel like its gonna bogg out when i drive it.. the gas milage is screwed up... and i smell a slight rotten egg smell. PLEASE HELP, WHATS WRONG?????

trbo2nr

Rotten egg? That sounds like catalytic converter.... could air sensor be damaged? Any lights on the dash?

Joeyc220

no lights on in dash, maybe f#@$# up o2 sensor???? but the performance is really bad now, like it doesent move at all

trbo2nr

Sounds like you're on the right track.

040mercedes

It definately sounds like you have a clogged catalytic converter. They smell like rotten eggs when they clog. I would think your sensor is fine, if it went out, you would see a check engine light. This would explain why the car bogs and stumbles, if the exhaust has nowhere to go, it'll run like ****.

pointman

a clogged cat would most likely emit some sort of strange sound... sounds like you may have bad plugs... or mas.

1st_C_Class

I had a clogged cat on a 280e, and it didn't make any sound. In fact, that was the giveaway- it was TOO quiet. You could hear the engine noise but no exhaust noise. And it could hardly move itself on the road with all the backpressure!

On the 280e there were 2 "pre" cats- one at each manifold outlet and when they slowly died, their contents would blow into the main cat and clog it up.

Good luck


Tim

040mercedes

I agree. I've seen several cars with clogged cats, and none of which made any strange sound. They just had the nasty rotten egg smell in the cabin.

Joeyc220

the car idles irraticaly

jimmyzgarage

Here are some symptoms of a clogged cat:

bogged down acceleration - especially hot
rotten egg smell
cat turns bright red

A possible reason for failure is that your engine is dumping unburnt fuel into the convertor. Like a coil or plug wire is bad or something that would cause one of the cylinders to not get spark. Nevertheless, it is odd that you do not have a check engine light.

Since you already paid a shop to fix your car, you should take it back, since it is still broken.

Good luck!

Joeyc220

found out its the fuel/air sensor!!!!!!!!!!!!! $400 for part

DougandhisC280

The what? Is that air mass meter or idle air temperature controller?

Joeyc220

its called a fuel/air sensor...hope that can help people