rottenrick1969

Hello everyone I chased down a problem why my engine wouldn't crank and after a lot of searching it was a simple fuse. Always a good place to start troubleshooting. LOL
Now I am back to my original problem. I have misfires on all the cylinders on the drivers side cylinder bank. The passenger side is fine. I am guessing it is the voltage transformer or the coil set. Any clues on how i can test the voltage transformers? I read in another thread that you can test each set of wires and they should match. I will do that next. Then possibly pull the coil set and see if they have problems.

The Shoeman

One bank of misfires could also be a clogged exhaust. If the inside of your front catalytic converter broke apart, its pieces will travel down stream and collect in the rear catalytic converter. This will clog it and restrict the flow, cause severe back pressure and then misfires....and only on the affected side.

There certainly could be other causes for your single bank misfires, but I have already dealt with this on my car with the exact same symptom.

I guess the easy way to test this theory is clear your error codes, then remove an O2 sensor from the same side you're having the misfires and then start the car.....with essentially a hole in the exhaust. This would relieve any back pressure and not cause a misfire. You'll throw other error codes, but you'll expect that.

Good luck and keep us posted.

tusabes

V12icpack.com

he will let you rent a voltage transformer or coil to test which part is bad - and you can keep the part if you need it

rottenrick1969

Thanks for the info. I will try the O2 sensor tip before i look towards the more expensive parts. I just completed testing the voltage transformer on both sides of the engine. I tested the voltage for each of the pins into each coil pack. I'm not certain what this says but I hear if they are relatively equal the transformer is ok. So here is what i found.

Left Bank: Red/Blue wire pin 16 on coil 178.7 Wiring diagram says should be 180 more or less
Red Yellow wire pin 14 on coil 22.85 Aux should be around 23 volts
Brown wire pin 8 on coil .016 Ground
Red/Grey wire pin 15 on coil 13.76 Battery voltage
Right Bank: Red/Black wire pin 16 on coil 178.5 Should be 180
Red/Brown wire pin 14 on coil 22.93 Aux should be 23 volts or so

Thanks for the tip on
Brown/Whte wire pin 8 on coil .00 Ground
Red/Green wire pin 15 on coil 11.20 Battery Voltage. ( I think this is less because i had to have someone crank the engine so i could test each pin and because the other bank isn't working it drained some cranking the engine.}
To me it seems the transformer is working ok. Any opinions?

Here are all the pins for more information if there is anything showing i'm not aware of.:

Left Bank: Pin 1: 3.5 Right Bank Pin 1: 3.5
Pin 2: 3.5 Pin 2: 3.5
Pin 3: 3.5 Pin 3: 3.5
Pin 4: 3.5 Pin 4: 3.5
Pin 5: .044 Pin 5: .036
Pin 6: .045 Pin 6: .037
Pin 7: .045 Pin 7: .037
Pin 8: .016 Pin 8: .00
Pin 9: no connection Pin 9: No connection
Pin 10: 3.37 Pin 10: 3.45
Pin 11: All over the place Pin 11: All over the place
Pin 12: 3.5 Pin 12: 3.5
Pin 13: 3.5 Pin 13: 3.5
Pin 14: 22.8 Pin 14: 22.93
Pin 15: 13.76 Pin 15: 11.20
Pin 16: 178.7 Pin 16: 178.5

There's some info if anyone knows any better than me. I think it is likely the coil pack if not the exhaust problem as The Shoeman suggests. I'll try that out now.
Thanks for your input as always. This is a very helpful forum.

Thanks for the info for V12icpack.com. I have heard good things about them. The loan on parts is pretty hard to beat.

rottenrick1969

Well i removed the oxygen sensor just as the exhaust leaves the engine and it still misfired as before. At least i can assume that it is something else. I think i'll have to remove the coil pack now to see what may be wrong with it. The loan for a coil pack and/or a voltage transformer seems like the thing to do now. Unless something else is causing the whole bank to misfire.

kraut56

You need to do a read out with SDS.
It will tell you exactly what voltages to check on what pins.
The ignition control when running will monitor the O2 sensors, and if levels are incorrect, shut the cylinders down to protect the catalist.
Replacing the O2 sensors may be necessary, but ONLY after an SDS diagnostic. Don't throw parts at it!

alugbati

I had the same problem with my 2000 s500. The whole side was misfiring. Check
engine code P0300, P0301, P0302. P0303, P0304. With pending code P0100, P0305

P0303 was stuck open, Lifted the injector rail, #3 cylinder was full of gasoline. Drained
#3 with a vacuum pump, replaced the #3 injector, Check engine gone.

wallyp

You were very lucky. If you get enough liquid into a cylinder to fill the combustion chamber, and you then start the engine, it will sometimes destroy it - Bent connecting rod, broken piston, bent crankshaft, etc.
Liquid is not compressible, and if the engine starts firing before the filled cylinder comes up on ignition, the liquid stops that piston instantly, and bad things happen.