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#31
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Fuel pressures are dead on....
I hooked up my vacuum gauges for the heck of it....Anybody know the idle specs that I should be looking for at idle? Do mine look about right?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 10-25-2010 at 01:34 PM. |
#32
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2 more tests done
1) Have 13.9v at the O2 sensor white wire. QUESTION -- Only ONE of the wires showed voltage. The other did not give me a reading. Should BOTH white heater wires give voltage? 2) Probed EHA and it gave me a fluctuating reading between 8-10mv. What does this indicate?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 10-25-2010 at 03:05 PM. |
#33
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Somebody recommended putting a sniffer on the exhaust. I have found a local shop that may be able to get a CO2 machine on the car for me...
Will that help me in any way figure anything out? I think I will unscrew the O2 sensor and just physically feel if it heats up instead of guessing regarding the voltage on the wires.
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
#34
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Want to keep this thread together for future searchers.
My o2 sensor readings. Does it show anything? I can't seem to make heads or tails of it. http://www.youtube.com/watch?v=QAmRXaGyW0w
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
#35
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bump...
Any other ideas? I'm gonna swap in a spare fuel distributor I have cleaned up and see what happens. What are the chances the injector tips could have gotten damaged during the overheating incident?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
#36
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Anything is possible. If you can take them out have a look at them. Have them pop tested to make sure they open at the right pressure. Id also suggest looking at the exhaust system. If you have cat converters they may be partially obstructed. High egt's and engine heat can melt them a little and cause your engine to work a little harder
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hum..... 1987 300TD 311,000M Stolen. Presumed destroyed |
#37
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Alright dude, Lets try this systematically:
1) Federal or Cali Car? 2) Duty Cycle Read out (x11) at op temp idle and 2500rpm? 3) If constant %, then we got a fault. 4) If not constant %, we're gonna test all the CIS-E mixture related devices. This is from a 560SEL, but most of the same stuff is in the 124 m103. The m103 126 didnt have a nice diagram like this... Make sure each component is working within normal parameters, then make sure the CIS-E computer is getting the data.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#38
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Wow, thanks for posting the flowchart! Now I have to figure out where the heck the EGR temp sensor and altitude sensor are on my 126
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#39
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O2 sensor and mixture are responding normally....
45-55% duty cycle, O2 sensor 0.1v-0.9v. If I try to lean out the mixture, the engine becomes very choppy. Brand new EHA and O2 sensor...all ignition components are new. No vac leaks. New fuel filter. That is why I believe it could be fuel related. California, but as an 87 just has the O2 sensor light.
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 01-21-2011 at 09:45 AM. |
#40
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Read an interesting post by Stevefbl....
Is this Fuel Distributor test accurate? Quote:
May also try a shot at fuel quantity measurement...Might be worth just pulling the injectors. I'll give a shot at cleaning them first too. A visual inspection may give an idea to if the overheating caused any damage....
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 01-22-2011 at 12:32 AM. |
#41
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Check the fuel pressure regulator. When it starts to leak it will vent into the intake via a vacuum line.
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#42
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Quote:
I received a new set of injectors + seals today. Gonna get them in tomorrow and fingers crossed that resolves it. I opted to check out my current insulators first before spending an unnecessary $35 on those suckers. In any case, the car is long term so probably a good move anyway.
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
#43
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Did the injectors fix it?
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#44
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Earlier on someone had underhood fumes issue diagnosed to a leaky EHA.
wonder if you had tell-tale smell of fumes . mak
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mark |
#45
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Finished up the injectors....
No difference unfortunately. The mixture went way off, so something changed for the better I hope. It's just so confusing why this happened after the running hot incidents... I keep wondering if compression or leakdown was affected, but I'm not burning any oil or anything. Fuel filter is about 10k old... Any thoughts on next?
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
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