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6 years ago
so i need some assistance from a benz expert or someone that is very familiar with the M119 engine and surrounding systems.
the error is the engine when ti gets warm and work temperature is it dont run right as its start misfire, it only start run smoother when we disconnect the ignition control units vacuum tube, we arent sure why it start missfire and why it does this, but also when we have it in this setup the ignition gets weaker and it can coff instead a bit.
we are seeing now how to permanent solve this problem or someone that knows about it can explain how the entire system works so we can figure out a solution and such.
and potentially a obd 1 diagnostic tool for said models of this era, that actually isint a fake one that dont work at all
the error is the engine when ti gets warm and work temperature is it dont run right as its start misfire, it only start run smoother when we disconnect the ignition control units vacuum tube, we arent sure why it start missfire and why it does this, but also when we have it in this setup the ignition gets weaker and it can coff instead a bit.
we are seeing now how to permanent solve this problem or someone that knows about it can explain how the entire system works so we can figure out a solution and such.
and potentially a obd 1 diagnostic tool for said models of this era, that actually isint a fake one that dont work at all
Major Matt Mason
~marmelmm
Having long and painful experience with the M119, I can almost guarantee you have a bad ignition coil on one or more of the plugs. Hook the vacuum back up, pull the coil covers and disconnect the plugs one at a time until you find the bad coil! Good luck!
we used the timing scan pistol and noticed it switched misfire on both sides, as the car has dual coils for both lines
Major Matt Mason
~marmelmm
If it's anything like my 1997 E420. you'll have individual coils on each plug... :)
sanny
~sanny
OP
its a 92 it has 2 coils connected to dual distributor caps
Major Matt Mason
~marmelmm
Ah. There, I dunno, then. Check your battery?
sanny
~sanny
OP
was replaced once
