NO Pedal Response!

[txquigly]

Greetings Diesel Lovers!
Ok, kinda stumped on this one.....I've had Several W-210s, all diesel. My current one is a '96 NA motor with the edc pump. I had a fuel leak at the shutoff valve, just like Every car I've had, pulled the valve, replaced the orings and life was good! On my way home, one of my fuel lines popped off due to the clip breaking and Completely filled my system with air! Trailered it back to my shop, fixed the fuel line issue and FINALLY got all the air out and running Perfectly. Life was good! While putting everything back together, I soaped it all down with Simple Green to hose off All the diesel that covered my bay. Drove it to the DIY carwash and gave Everything a good cleaning under the hood.....just like I've done Dozens of times. Pulled out of the diy wash and went through the drive through wash to clean up the rest of the car.....still good. Got through the wash, went to pull out on the street and NO PEDAL Response!! Limped it around the corner, checked everything I could think of and got towed back to my shop.....again.
So it was throwing a hard code for the EGR circuit, (i think po-403) and as Soon as it's cleared, it pops Right back up. I have dried every connection as well as unplugged & plugged back in Every connection under the hood....electrical And vacuum! Still no pedal response At All. I pulled a throttle servo off my '99 to see if the pedal servo was the cause, and didn't change Anything!! Just to be clear, it will Touch start and idle like a New car! It just Won't do Anything Else!!
I'm Stumped!! What can cause a Complete lack of pedal response?? ANY input would be Greatly appreciated!!

TxQuigly

[Murkybenz]

Does it have the throttle potentiometer on the inner wing that the throttle cable connects to ?, if so check it’s still bolted down and nuts are not missing etc / plugs and cable all ok and it moves when pedal applied.
Other thing is the tach working ?, if it isnt your problem is a bad crank sensor / or its wiring.
Could be a host of things but I have no experience of any other traits that could cause your problem but others will point you in the right direction

[engatwork]

I'm thinking the mechanical to electrical throttle mechanism mounted in front of the brake master cylinder may have some issues.

[txquigly]

I hadn't thought to look at the tach....could be a possibility of a crank sensor. But why is it throwing a hard EGR code?
Thanks!!

[txquigly]

Good afternoon! Finally had some time to get back to my car.....Started right up and the Tach IS working....so I'm assuming that the crank sensor isn't the issue. On my 99, when the CPS went out, it wouldn't even start!
So.....I continue to be at a loss here!! Does Anyone have a direction I might go??

Thanks, Quigly

[C.Doner]

"just like I've done Dozens of times." OP

Spraying expensive hard to diagnose electrical sensors in an engine bay with water is risky. Lots of people do it, and swear by it, but there have been countless breakdowns due to the practice. Water does not conduct electricity, but when it dissolves an ionic substance like a metal oxide, it does. If there is already a small amount of corrosion, that salt dissolves readily in water and will short out an electrical current. Even without pre existing corrosion, adding water will cause corrosion. Do you think all of the sealed electrical connections are still water tight after 24 years?
I don't have specific info for that model, but wiring harnesses can collect water and corrode. There could be a crimp done at the factory that has finally split due to corrosion, or a sensor got wet, and fried. I would be hunting around with an ohm meter. Check all the wires and connections associated with that system. I wish I could be of more help. Good luck.