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  #16  
Old 02-25-2006, 07:07 PM
Ta ra ra boom de ay
 
Join Date: Jun 2004
Location: Pittsburgh
Posts: 1,915
New fuel filter (and spark plugs) did not help.
It does not seem to be related to how much fuel in tank.

The one thing that strikes me as some kind of clue is: as it starts loosing power, if I quickly flip the key (ignition switch) to position I then back II (on) it regains power for a short time... like 15 seconds aprox.

I will continue to figure out these tests and begin to impliment them... and post updates as they become available.

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-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html
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  #17  
Old 02-25-2006, 08:35 PM
davestlouis's Avatar
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Join Date: Dec 2005
Location: Cincinnati, OH
Posts: 571
My W126 420SEL is doing the same thing...the recirc button on the HVAC panel clicks in time with the stalling/stumbling. I have been trying to locate the problem, and when I unplugged the OPV box the idle climbed several hundred RPM's and the stumble went away for the moment anyway. Mine doesn't die, it just stumbles under load.
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2 x 2013 Honda Civics
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  #18  
Old 02-25-2006, 08:36 PM
davestlouis's Avatar
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Join Date: Dec 2005
Location: Cincinnati, OH
Posts: 571
to clarify, you had a post that referred to clicking from the dash...that was what struck me as odd, because mine is giving me the same symptom.
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  #19  
Old 02-25-2006, 08:44 PM
Ta ra ra boom de ay
 
Join Date: Jun 2004
Location: Pittsburgh
Posts: 1,915
I understand dave.
I think it may be due to vacuum loss caused by not enough combustion due to the fuel delivery problem. Wish I knew for sure, it's a frustraiting mess... but it gives me a hobby to pursue.

Thanks for the tip ande......
__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html
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  #20  
Old 02-27-2006, 10:27 AM
Ta ra ra boom de ay
 
Join Date: Jun 2004
Location: Pittsburgh
Posts: 1,915
Re-did the vacuum line from the fuel accumulator to the breather hose and the rubber on either side of the ICV to no effect.

I got a good clue on the test drive though. After it started loosing power again I disconected the EHA again as larry suggested eariler. (it didn't stall or stutter the first time I did that but I forgot to test it again that way because starting the car in the AM in February in Pittsburgh is not really an option without the EHA). So it was stalling every 20 seconds, pulled over and took off air cleaner and disconected the EHA, put everything back together and took it out and around for 55 miles... no stalling!

Now to figure out where the bad input is comming from.
__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html
Reply With Quote
  #21  
Old 02-27-2006, 06:57 PM
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Join Date: Apr 2005
Posts: 51
EHA regulation

If Im not mistaken, the KE control module cycles the EHA to maintain correct fine end fuel metering from the fuel distibutor. The KE module adjusts the duty cycle to the EHA via the oxygen sensor voltage output into the KE unit. So, if the O2 sensor is malfunctioning, the EHA will not be regulated properly, or if the KE unit is not being powered correctly, or if it has a cold solder spot on its pc board, this can also cause the failure of the EHA to be properly regulated. I have recently reflowed all my control units in my 300TE, (KE unit and MAS unit) there were some cold spots, but not many, and my car happens to be quite prestine as it was always garaged. When you get the engine to run normally after a quick power down and quick power up routine, (ignition switch off-on), it could be the OVP relay getting a better bite on its contacts for a few moments, until it looses its contacts integrity, or perhaps the KE unit is starting from a center point setting referrence that is governed by its firmware. A newer VOM with a DC volts duty cycle percentage setting, might help you see if you are indeed getting the correct control signals from the KE module. If you know someone who is an electronic repair person, have him re-flow all the sub boards and pinouts in the KE unit, and take a voltage reading from the O2 sensor to confirm it is working. (Its around .450 to .500 milivolts) If you havent changed the OVP relay yet, nows the time to try at least a known good one to see if it is a power problem to the KE unit.
Dave...
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  #22  
Old 02-28-2006, 11:25 PM
Ta ra ra boom de ay
 
Join Date: Jun 2004
Location: Pittsburgh
Posts: 1,915
OČ sensor.

Larry you called it.
Checked the duty cycle today and got a reading of 90-92% (I had checked it last week and it was 55% so I thought it was OK) exposed the OČ connector and waited for the bogging. it was kind of harry stearing with my knee on the highway as she was dieing and leaning over with both hands to pull the plug on the OČ control, but after I did the stall stalled out, power came back, and I laughed and smiled the rest of the way home. I replaced it almost one year ago so I thought it was good. Guess I had better get to those valve seals this summer, it must be taking a real beating back there.
Dave Rose,
I can't thank you enough for the elaborate insight into the fuel delivery system. I feel ready to delve into it and have, with your help, assembeled most of the fittings, hose, and gages that I will need to do so. Thanks for taking the time.
I think will go to ford and get the proper conector so I can just snap that 91' mustang 302 sensor right into the system. And I'll update as this gets finished up... and thanks again.

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html
Reply With Quote
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