Any other Ideas? - PeachParts Mercedes-Benz Forum

W108 · #1 10-02-2006, 05:47 PM

I've already checked the CSV as well as the WRD although when I opened up, and cleaned the WRD, I still heard suction in the air filter. Are there any other ways to alleviate that?

Also, any other tests to check for rich running? Thank you.

psfred · #2 10-02-2006, 07:59 PM

Plug and tailpipe color.

Peter

Arthur Dalton · #3 10-02-2006, 08:45 PM

Quote:

Originally Posted by W108

I've already checked the CSV as well as the WRD although when I opened up, and cleaned the WRD, I still heard suction in the air filter. Are there any other ways to alleviate that?

Also, any other tests to check for rich running? Thank you.

There is something not closing on the WRD.. Either the thermo plunger is not extending [ but you said you tested that, correct ??] or the air slide is stuck/dirty and not closing off the air filter intake.
Until you get this device to close intake air off at temp, you can not make any MFI adjustments.

If all parts are free , check that someone has not installed the air slide upside down.. I have seen that happen on occasion..

http://www.sl113.org/forums/uploaded/ja17/200662802329_20046281523_InjPumpWarmUpDeviceParts_1.jpg

W108 · #4 10-02-2006, 10:05 PM

Quote:

Originally Posted by psfred

Plug and tailpipe color.

Peter

Yes, those are black, and the plugs were sooty.

W108 · #5 10-02-2006, 10:09 PM

Quote:

Originally Posted by Arthur Dalton

There is something not closing on the WRD.. Either the thermo plunger is not extending [ but you said you tested that, correct ??] or the air slide is stuck/dirty and not closing off the air filter intake.
Until you get this device to close intake air off at temp, you can not make any MFI adjustments.

If all parts are free , check that someone has not installed the air slide upside down.. I have seen that happen on occasion..

http://www.sl113.org/forums/uploaded/ja17/200662802329_20046281523_InjPumpWarmUpDeviceParts_1.jpg

Yes, it seemed odd to me as well since when I opened up the device, I cleaned everything, and slightly lubricated the moving parts.

Also I couldn't get the air valve, and plunger out of its housing but it seemed to go up, and down smoothly enough.

Arthur Dalton · #6 10-02-2006, 10:13 PM

You said you tested the thermo bulb.. How many mm did it protrude??????

W108 · #7 10-02-2006, 10:31 PM

Quote:

Originally Posted by Arthur Dalton

You said you tested the thermo bulb.. How many mm did it protrude??????

I put it in a glass of hot water, and it protruded about 3/4mm.

Arthur Dalton · #8 10-02-2006, 10:38 PM

Should move 3 mm from 20C to 80C.

W108 · #9 10-02-2006, 10:40 PM

I'll try testing that again; do the termostats commonly fault?

Arthur Dalton · #10 10-02-2006, 10:46 PM

No , the WRD tends to wear on the links in the pump and can be corrected by removing the WRD shims, but I am not going to have you remove the shims until you know if the pin on the thermo is protruding the correct amount b/c that would be the correct remedy to your problem. Removal of the shims is to make up for link/pin wear , but that is done ONLY when one knows the actuating pin is working correctly..horse before the cart