So the old girl ran great last night but when I jumped in her this morning the idle sounded awful. It almost sounds like a cylinder miss. Under moderate acceleration the engine sounds very rough as well. Its a very blurb-blurb-blurb sound. Its strange though because the problem is slightly intermittent. Between 2400 rpm and 3000 rpm the engine sounds fairly normal again. On top of that there were a few times when the blurbiness vanished for a few moments.

Are there any electrical components I can inspect that might fix this? I should mention that my serpentine belt let out a nasty squeal this afternoon and looks a little worn. Is that related to my issue?

__________________
'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09

Check for loose spark plug wires?

__________________
http://i193.photobucket.com/albums/z...-RESIZED-1.jpg
1991 300E - 212K and rising fast...

Checked that first. Will check again though....

__________________
'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09

check distributor for tracking on inner side or rotor for high resistance /burned tip . Ignition wire connectors for grounding .

Ad

Exactly, and don't economise on distributor parts, MB original is worth it in the long run although I've heard that Beru is good. I have Beru wires and all seems well.

Also, nice cheap copper plugs from NGK or Beru are the best - no resistors or exotic multi-pronged devices.

RayH