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Car Forum / Mercedes-Benz Cars / September 2006Mercedes 300E High hydrocarbon
I have a 1990 Mercedes 300E. Have 225000 km. I changed spark plugs, dist. cap. rotors, ignition wires, cleaned air filter, put in injector cleaner and drove the car for over 300 km. Checked vaccum lines best I could. Engine light does not come on. I took it for emmision test and it failed on hydro carbon. Limit is 59 ppm and the car has 114 ppm. Can any one help as to what else I should check? Thanks Sheel >I have a 1990 Mercedes 300E. Have 225000 km. I changed spark plugs, >dist. cap. rotors, ignition wires, cleaned air filter, put in injector [quoted text clipped - 3 lines] >ppm and the car has 114 ppm. Can any one help as to what else I should >check? Thanks are you burning any oil? How often do you have to add oil? I had much the same problem on my '89 300e and did as you above except now I also had the valve seals replaced since I was burning oil.... will be doing emission soon.... sorry I can't help yet cheers, guenter > are you burning any oil? How often do you have to add oil? I had > much the same problem on my '89 300e and did as you above except now I also > had the valve seals replaced since I was burning oil.... will be doing > emission soon.... sorry I can't help yet > > cheers, guenter I have to put a liter every 2000-2500 km. How much did your valve seat job cost? >> are you burning any oil? How often do you have to add oil? I had >> much the same problem on my '89 300e and did as you above except now I also [quoted text clipped - 3 lines] >I have to put a liter every 2000-2500 km. How much did your valve seat >job cost? Does not appear terribly excessive... are you burning oil mostly when driving at freeway speeds? or just tooling around town. If the former, then seals may be worthwhile I'd think. Had the dealer in town do it.... can't remember off hand how much it was, but pretty sure it was just a few hundred or thereabouts (Canadian, that its). It's the 'bookprice' so not much choice cheers, guenter > Does not appear terribly excessive... are you burning oil mostly when > driving at freeway speeds? or just tooling around town. If the former, then [quoted text clipped - 3 lines] > > cheers, guenter > Does not appear terribly excessive... are you burning oil mostly when > driving at freeway speeds? or just tooling around town. If the former, then [quoted text clipped - 3 lines] > > cheers, guenter Mostly tooling around. I am in Canada (Waterloo, Ontario) as well. Did you get it done by Mercedes dealer? >> Does not appear terribly excessive... are you burning oil mostly when >> driving at freeway speeds? or just tooling around town. If the former, then [quoted text clipped - 6 lines] >Mostly tooling around. I am in Canada (Waterloo, Ontario) as well. Did >you get it done by Mercedes dealer? small world, I'm in Waterloo also and went to our dealer on Victoria. The mechanic who does this repair is excellent. cheers, guenter >>> Does not appear terribly excessive... are you burning oil mostly when >>> driving at freeway speeds? or just tooling around town. If the former, then [quoted text clipped - 6 lines] >>Mostly tooling around. I am in Canada (Waterloo, Ontario) as well. Did >>you get it done by Mercedes dealer? meant to add, high speed oil consuption (large amounts beyond that normally observed at lower speeds) tends to point to valve seal problems - at least from my limited understanding, those more knowledgeable may correct me on that. do remember that supposedly 1l/1kkm is 'supposedly' within factory spec..... cheers, guenter Especially considering we're talking near-village here... ;-) I mean, it's not like LA, from where half the participants of this NG seem to come... DAS For direct contact replace nospam with schmetterling --- [...] > small world, I'm in Waterloo also [...] > cheers, guenter ...on the other hand, most Canadians live in walking distance of the US border and most of those live in southern Ontario... DAS > Especially considering we're talking near-village here... ;-) > [quoted text clipped - 11 lines] > [...] >> cheers, guenter >...on the other hand, most Canadians live in walking distance of the US >border and most of those live in southern Ontario... Not quite, but 1/3 of canada lives in the toronto area (1.5 hrs from the border) and 90% of Canada lives within 100 miles of the US border. The Toronto area is the largest local dialing area in the world. And MArseilles is the second largest seaport in France. Trivial Persuit anyone?  SignatureNeed Mercedes parts? http://parts.mbz.org Richard Sexton | Mercedes stuff: http://mbz.org 1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net 633CSi 250SE/C 300SD | http://aquaria.net http://killi.net Largest in area or population? (Must be former since Paris, Cairo and London, to name but three, have bigger populations than GTA.) And then, are you counting all area codes: 905, 416 etc? If so, what is the biggest local dialling area ON A SINGLE AREA CODE? The way things are going, whole countries will be on a single call rate, making them very big local dialling areas... DAS For direct contact replace nospam with schmetterling --- [...] > The Toronto area is the largest local dialing area in the world. > > And MArseilles is the second largest seaport in France. Trivial Persuit > anyone? [...] >> The Toronto area is the largest local dialing area in the world. >> >Largest in area or population? (Must be former since Paris, Cairo and >London, to name but three, have bigger populations than GTA.) Area, or rather distance. >And then, are you counting all area codes: 905, 416 etc? > >If so, what is the biggest local dialling area ON A SINGLE AREA CODE? When I heard this, and it was a few years back, all of tornoto and environ was 416. Now that they've moved a bunch of things into 905 it may not be true any more. But I don't relaly know. >The way things are going, whole countries will be on a single call rate, >making them very big local dialling areas... Fair enough. I pay $18/mo to Bell and get virtually unlimited North America wide long distance free. SignatureNeed Mercedes parts? http://parts.mbz.org Richard Sexton | Mercedes stuff: http://mbz.org 1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net 633CSi 250SE/C 300SD | http://aquaria.net http://killi.net >Especially considering we're talking near-village here... ;-) > [quoted text clipped - 3 lines] >I mean, it's not like LA, from where half the participants of this NG seem >to come... Ironically I moved from Waterloo to Los Angeles in 1979 but was born in the UK. Even more ironically I only drove Subarus in LA. SignatureNeed Mercedes parts? http://parts.mbz.org Richard Sexton | Mercedes stuff: http://mbz.org 1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net 633CSi 250SE/C 300SD | http://aquaria.net http://killi.net "The world is not only small, it is also ironic." Discuss. DAS For direct contact replace nospam with schmetterling --- [...] > Ironically I moved from Waterloo to Los Angeles in 1979 but was born in > the > UK. > > Even more ironically I only drove Subarus in LA. Guenter, I did my emission at Oil Changers on Victoria and Fredrick first time it failed with HC at 69. Second time I took it after changing ignition parts but surprisingly HC jumped to 113. I had replaced all ingition parts. ( all Bosch plugs, dist. cap, wire set and rotor) I put Bosch platinum plugs instead of regular Bosch H9DC. Can not understand why the HC got worst after changing ignition parts. I found that Canadian Tire can get you Bosch parts at almost half the price that Victoria Star charges. I had priced them @ Victoria Star for above for $692.35 where as at Canadian Tire, I paid only $347.80 both including taxes. You just have to give them Bosh part number easily attainable from the internet. I am still thinking where to take my car for diagnostics. Cheers Neil >Guenter, > [quoted text clipped - 4 lines] >platinum plugs instead of regular Bosch H9DC. Can not understand why >the HC got worst after changing ignition parts. Bingo! there's part of your problem. Platinum plugs. Throw them away and replace with the Bosch H9DC (or any other copper plug for that matter). The platinums have resistance build in. Older engines have the resistance in the distributor and the plug connector. This extra resistance can change the quality and/or timing of the spark significantly, as you found out. >I found that Canadian Tire can get you Bosch parts at almost half the >price that Victoria Star charges. I had priced them @ Victoria Star for >above for $692.35 where as at Canadian Tire, I paid only $347.80 both you can do even better, go to Parts Source on Weber near University. >including taxes. You just have to give them Bosh part number easily >attainable from the internet. >I am still thinking where to take my car for diagnostics. Neil, MOST important is that after you change your plugs, you get the engine good and hot (ie the catalysts) and get the measurement done 'immediately' after you stop driving. Go for a run out to St.Jacob and make sure the testing station will take you immediately after (possibly leave car in 3rd gear :-) good luck, guenter Guenter, Thanks. I will try what you said, change the plugs and take it for a long drive, then go for emission at a different place this time, most probablly at Econo Oil at University and Weber. Will let you know what happens. Canadian Tire owns Parts Source and have the same outfit. Thanks anyway. Neil >Guenter, >Thanks. I will try what you said, change the plugs and take it for a [quoted text clipped - 3 lines] >Canadian Tire owns Parts Source and have the same outfit. >Thanks anyway. Run a tank of premium mixed with some gas line antifreze through the car. That helps. If it hasn't already been said, change the air filter too. SignatureNeed Mercedes parts? http://parts.mbz.org Richard Sexton | Mercedes stuff: http://mbz.org 1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net 633CSi 250SE/C 300SD | http://aquaria.net http://killi.net Thanks Richard, I will try that too. Could not get Bosch H9DC spark plugs so bought Champion eqvivalent copper ones. I had put platinum plugs and may be thats why HC went up as Guenter suggested. >Thanks Richard, >I will try that too. >Could not get Bosch H9DC spark plugs so bought Champion eqvivalent >copper ones. > I had put platinum plugs and may be thats why HC went up as Guenter >suggested. no question, just make sure for your re-test that they take you 'right away' after you get the cat good and hot..... NO! lolligagging for coffe or what have you :-) cheers and good luck guenter Richard Sexton, Guenter, Thanks for the help. I changed plugs and air filter, took it for emission at Econo Lube on University and Regina.. It FAILED at HC 81. Then the guy changed oil and put in thick synthatic oil (PZ26) instead of regular oil and did retest. It just PASSED at HC 52. Allowable limit is 52. At least I dont have to worry for 2 more years. Just for information, I have learnt that synthatic oil burns much less than regular oil, so HC is reduced. It cost $50.00 more, but saves the other hassels of adjustments. Cheers. >Richard Sexton, >Guenter, [quoted text clipped - 7 lines] >other hassels of adjustments. >Cheers. glad to hear it. Interesting about the synthetic oil, it does make sense. However, do tell what the oil was. Pz26 is the filter for the syn oil I will likely need to do this for my next emission test. cheers, guenter Hi, The invoice just says Syntec- 57238 for oil and PZ26 for filter. You can varify by phoning Econoy Lube, Waterloo. Phone # 746 2677. I should have asked them, but is a thicker oil though. Cheers & hope your car passes without a hitch. Neil > >Richard Sexton, > >Guenter, [quoted text clipped - 13 lines] > > cheers, guenter Check out this site: http://www.canadiandriver.com/articles/jk/at_001121.htm Neil, interesting compared to your findings. big difference of course is the age of the engine and, possible/probable oil leaking into the cylinders via the valve stem/seals. Because the syn oil remains more viscous it appears to make a significant difference in HC levels on old engines thanks for that, guenter >Check out this site: > >http://www.canadiandriver.com/articles/jk/at_001121.htm > are you burning any oil? How often do you have to add oil? I had > much the same problem on my '89 300e and did as you above except now I also > had the valve seals replaced since I was burning oil.... will be doing > emission soon.... sorry I can't help yet > > cheers, guenter I have to put a liter every 2000-2500 km. How much did your valve seat job cost? If it is a CIS fuel injection, then you need to adjust the fuel mixture. If it is fuel injection, then you need to check timing. > If it is a CIS fuel injection, then you need to adjust the fuel mixture. If > it is fuel injection, then you need to check timing. I dont know how to check if it is CIS. It does have fuel injectors. Any idea how to adjust fuel mixture? I understand it might be factory set. Thanks. I meant electronic fuel injection where you need to check timing. CIS has a round fuel distributor in the middle of enigne or on the side... there is an allen key in the middle recessed... it is best to have a garage adjust this with their exhaust analyzer. |
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