Hey all,

I've been working on my '87 300e for a while and now I have multiple problems popping up.
The worst is my gf nagging that the idle shaking causes her chest to hurt since its sensitive after her surgery...go figure.
I recently replaced the fuel injectors and now the car shakes worse than before, I also have a problem with it dying and unable to restart when idling in the heat too long and a newfound loss of pretty much all acceleration.
I have a funny smell from the exhaust, maybe too rich, but it smells faintly like a lawnmower and the tailpipe makes a low "putt putt" noise. No smoke, no oil in the coolant, no loss of fluids, but just two days ago it started making a loud thump when idling or braking to a stop (coming from the rear).

I pulled the spark plug wires thinking a piston is misfiring/not firing. Plug 1 caused a violent shaking and dying while 3 and 4 did nothing. 2, 5 and 6 slowed the engine a little. Then I did 1 again and nothing happened.
All wires, pickups, etc are doublechecked that they are plugged in. I'm coming to the hard realization that the more I work on her the worse she gets.

Any help would be appreciated before I take it to the shop. I'll post a pic to better diagnose the problem.

Matt

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1987 300e

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