So i was driving home today and then i gave the car a little more gas then i usually do and all of a sudden i noticed the check engine lite come on and it said to check engine electronics, then at the stop light i noticed my car was vibrating like almost a bouncing feeling like a really old car or something.

I drove it out for a couple of stoplights but then i decided to stop turn it off and on. For some strange reason this worked and the car stopped vibrating like jello but the check engine light stayed on! any ideas

 

where are you located?
quick acceleration and misfire and light ,with return to normal driving but the light still on,is often the maf.Post the codes and proceed from there .Do not go to the dealer


scanner #94169 40 bucks at the store if you ask them to match the internet price.
http://www.harborfreightusa.com/usa/...te.do?state=CA
"GOT CODES?"

 

Thats a good idea. Check the codes. In the past my E420 did this and I had a coil going bad. Once the computer gets that misfire code the light stays on. Now once I replaced the bad coil and drove it for about 15 minutes the light cleared itself..........driveablitiy check of computer.

Good luck.

Jeff

 

I think it has something to do with your engine wiring harness also....

 

My 1997 E320 did the exact same thing once, I gave it a little more gas to accelerate and noticed a little misfire (shake) while accelerating and check engine light came on saying " check engine electronics". I didn't pay any attention to it until a few hunderd miles later it started that shaking you talked about. It turned out to be a bad coil.

Before you clear the codes, read it and pay attention to which cylinder has misfired. I would start with a new spark plug (cheapest fix). If not fixed it is either the coil or spark plug wire. read below to find out if it is your coil. On the E320 engine one coil sparks 2 cylinders at the same time so you would think if the coil is bad you should be getting misfire on both cylinders associated with that coil. No, don't be misled, a bad coil can still fire one cylinder and not the other. It happened to me and I found out after replacing spark plugs and wires. If you have fairly new spark plugs and wires, I would be suspicious to your coil.

If your engine runs smooth now the code should clear itself or you should get autozone to clear it for you. But expect the problem to be coming back soon. Autozone also checks coils too.

The way I pinpointed the coil (with one cylinder misfiring at all times, after replacing spark plugs and wires): read codes, misfire cyl 5. then switched the coile on cyl 5 with cyl 3, cleared codes, started engine, read misfire cyl 3. so I got a new coil and problem gone.
Few things to keep in mind: Do not use any spark plugs except bosch F8DC4 which are the copper ones, gapped at 0.032 inch (double check this as I'm not 100% confident if i remember right). I am using NGK coppers and they seem to be working well but my next ones will definitely be the F8DC4's. I originally used Bosch Platinum +2 (with the two heads) and got random misfire error code.
Use boot protector grease on your spark plugs to keep them from sticking to the wire boots.
Don't use anti-seize on spark plugs, it is not recommended, creates residue, absorbs dust, and you'll end up over-torquing your spark plugs since it lubricates them.
Torque spark plugs to 20 ft-lbs using a torque wrench. A basic one should be in the range of $7 to $15.
Let us know how it goes.