'92 190e 2.3 no run after tranny swap - PeachParts Mercedes-Benz Forum

85300DT · #1 07-02-2008, 05:47 PM

I swapped out the 722.408 trans that was pooched with a rebuilt 722.400 as it was close to free and was freshly rebuilt with 1000kms on it. I dropped the original trans with no issues. Made the necessary mods to the kickdown solenoid and modulator. Upon re-install, I hurt my back doing stupid things like lugging whole transmissions (without taking out the torque converter) and placing them on the bench. I let our junior guy bolt up the trans. The next few days I inspect and find he did not seat the converter and just bolted up the trans

. Luckily the car wasn't run, so I was able to separate the cases and push the converter back and seat it properly onto the pump. Bolt it all up and go to start. Car seems to catch, but does not want to continue to run. I replaced the crank position sensor as I thought the original one may have been damaged when the junior guy initially bolted it up as the flywheel was pushed a bit in. I can hear the car prime fine. I get spark fine. I smell lots of fuel being dumped in. The car ran fine before the swap. I need some direction here - I checked all connections and all appears good. Confused

david s poole · #2 07-03-2008, 10:30 AM

did you remove flywheel----and if so did it go back in correct place?

85300DT · #3 07-04-2008, 10:00 PM

No, flywheel was never touched. I did quite a but of troubleshooting here. Checked for spark, getting spark. I checked plugs, appears like I am getting fuel. I replaced the rotor and cap and wires, and yes I have the wires in the correct firing order. I can get the car to run at 2500+rpm but it runs real damn rich. This is an odd one as the car ran fine before the transmission swap. No engine wiring or cabling or connectors were removed or disturbed. Fuel pumps prime fine. I am wondering if the CIS ecu is in trouble as that is supposed to take over running after initial start is made. I wonder what am I missing here? I'm going to check fuel pressure tomorrow to isolate the issue from being a fuel delivery or a electrical/sensor/ecu issue.

stevebfl · #4 07-04-2008, 10:13 PM

The first thing to do is to forget that it ever ran properly. That fact has nothing to do with what is wrong. What is wrong is what is wrong and someone needs to figure it out.

If you think electrical control is involved with your problem disconnect the EHA. It will make it harder to start but the car will run just fine without electrical control if one adjusts the mixture. Once you have driven it around with it running fine, then return the electronics to control.

As always the first step is to determine fuel pressure.