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#76
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barn storming here, so this may be less than useful... is there still vacume in the 'system' ? (does the central locking system still work?) If yes, then may be the problem is it the ignition switch area. I dont understand how it works other than once the key is shut off, vacume is directed to the Vacume shut off valve which in turn shuts off the fuel...
how about if you were to disconnect the vacume lines to the IP (make a good diagram or something so that they can be hooked back up) and then try and start the car? granted if the car starts you will need to use the off lever to shut it down.. Second area to investigate is the "off" lever take a flashlingt and look between the injection pump and the block to observe how the linkage works. some where in between there there is a set screw (fairly long on the ones I have seen) attached to the injection pump, that controls how far up the lever below it is allowed to come. (this is the low idle adjustment.) That is the area to focus you attention on as you play with the off lever.
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46 WDX Power Wagon 84 300TDT daily driver |
#77
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No fuel from injection pump.
Remove all vacuum lines from the injection pump, if it starts up = bad shut down vacuum switch.
Remove oil fill cap, if car starts = massive excess blow by = new engine. If the above fail, read the following with great care. Most often = air leak before injection pump. Did you replace the cartridge fuel filter,rubber seal ring and metal seal ring on the bolt??? Did you fill the fuel filter before installing??? The injection pump is very low volume + high pressure. Once you get air into the injection pump, it takes great effort to clear it out. From your description of your primer pump operation, it may be junk = massive air leak = no prime = no run... |
#78
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primer pump
Two of us have pumped the primer pump. Neither of us noticed any change from the first to the last pump. It also squeeks.
I've changed the pic here. There are two loose cables. Hopefully you can see them. One has a brown cable in a black sleeve, the other one is black with a metalic end. It looks electrical to me. btw. How can I attach a thumbnail that can be enlarged? I've seen them on other posts. I'm happy, with all this new info, that no one has mentioned the IP failure senario. It does seem to me that the system is 'stuck'. I couldn't see everything my friend was doing when I was cranking, but I did hear him tell my other friend to stand back, in case gas sprayed out. We did the test where we opened the oil cap and looked in while cranking. He said the engine is fine. I have to find out if the filter was filled or empty when installed, as I wasn't around. regarding the fuel. It has a half tank. It probably ran for a couple of weeks. I was doing a mileage test, so I ran it for a couple of hundred miles, then I was going to fill it back up.
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Janet 1979 240 D China Red SOLD 1973 GMC Green Service Truck w/ lift |
#79
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fuel fileter
He said the fuel filter was put in full.
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Janet 1979 240 D China Red SOLD 1973 GMC Green Service Truck w/ lift |
#80
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Ditto on the thumbnail question. I recently
Quote:
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Jim '49 170?(donated to church in Darmstadt '58) '58 220S(crusher, after '73 fire[San Antonio]) '72 280SE 4.5 '77 240D '81 300SD '83 240D parts car |
#81
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You can attach a photo as follows:
Press "reply to thread" as usual. Type in your normal reply. Drop down to the bottom of the page. Title of block: "Additional options" In "additional options" is a subtitle "attach files". In "attach files", press the button: "manage attachments" A new window will open. There will be a box to enter the file name that you wish to upload. If you don't know the file name, press the "browse" button right next to the window for the file name. Now, search your computer and find the file that you wish to upload. Select it and it will appear in the window. Press "upload". The file is now on the M-Shop server. Press "close this window" in the upper right corner. Go back to your reply, proof read it, and press "submit reply" on the bottom of the page, as normal. The reply and the thumbnail will be displayed in the thread. You can submit more than one photo for every reply. Instead of closing the window, just browse again and upload again. Do all this before submitting the new reply to the thread. |
#82
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Thumbnail pic of loose connectors
Thanks for the tutorial. Here is a thumbnail of the loose wires.
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Janet 1979 240 D China Red SOLD 1973 GMC Green Service Truck w/ lift |
#83
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What the tutorial failed to tell you was that Mercedes-Shop limits the size of the file. If the file is larger than 66KB, it won't be displayed. If your photo is larger than this size, you need to make it smaller by reducing the size or the resolution of the photo using photo editing software.
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#84
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Thumbnail pic of loose connectors
Hopefully, there is a pic here. these are part of a bundle of wires that come out on the drivers side from behind the dashboard.
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Janet 1979 240 D China Red SOLD 1973 GMC Green Service Truck w/ lift |
#85
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file size
I used the 65x65 pic which is 7.60KB Is it possibly too small?
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Janet 1979 240 D China Red SOLD 1973 GMC Green Service Truck w/ lift |
#86
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I don't think you can have a file be "too small", but, I cannot say for certain.
Are you sure that the photo was uploaded properly? |
#87
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ok, on mine, again sorry to hijack but I have similar problems.
I know my compression isn't great but the car was running well before these problems began, I'd just driven it about 600 miles. If I pump the primer fuel shoots out of the line at the ip. I hadn't read in detail and only disconnected one line out of the injection pump, and it's getting all but nothing coming out, should I disconnect the other 3 and try again? A catch pan was mentioned, the amount that's coming out could be absorbed by a piece of toillet paper. I do have SOME smoke coming out of the exhaust, so perhaps disconnecting only one line is not enough, but it's getting dark. In any case, if one line being disconnected is adequate and there is little to no fuel coming out of this, what next, change IP? Thanks On a positive note, I went to the junk yard today, got seats out of a 1980 300, got a new starter, got some wheels off the 300d, and got a few nick nacks that were messed up on my car, like I had a lock plunger that was broken and got a new one. I want to get this baby running. With the starter I thought I'd need it, and it was 14.99 so even if I don't no loss, actually I'm not even sure if it's the same starter. -Nate
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'82 240D, 4-speed, 617 turbo engine |
#88
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Nate,
Not sure that it is clear to me, where is the fuel comming from when you pump the primer? sounds like a fuel leak in any case, which is no good, and needs to be looked into. Also, If the primer pump is working, and say you had the bleeder valve open on top of the fuel filter, pumping the primer pump out to give you a 1/8 to 1/4 of a cup in 5-8 primer strokes (my guess) in other words, a fairly good amount of fuel. seems to me that if you fix the leak, then bleed the system Both the fuel filter AND the Injection pump. Then you are in a position to start troubleshooting the issue. your fuel leak could be letting air in the system, and be causing some or all of this headache. Injection pumps do fail but it is rare, and hardly ever over night, usually they give plenty of warning say 10 thousand miles or more.... In summary make sure you check all the basics first. that is where 75% of the troubles come from and it is always cheaper than replacing parts. (trust me I tend to learn backwards in that respect)
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46 WDX Power Wagon 84 300TDT daily driver |
#89
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if I pump the primer fuel shoots like crazy out of the top of the big filter (if I loosen the bolt on top.) I was just trouble shooting lines so my statement was that if I pump the primer and loosen the banjo bolt for the line going into the ip and pump it's just the same as when I loosen the bolt on top of the filter and pump the primer. So, I started at the in line filter and there was fuel there, then there was fuel (when I pumped) going into the second filter, then fuel at the top of the second filter, and fuel coming out and going into the IP. from there I tightened everything down and undid a single line to the 1st injector. I then cranked the engine, little to no fuel was coming out of the line. I tightened it, I tried with another line to the #4 injector, same results. I then worked back to the pump by disconnecting the line at the pump, same results, very little fuel. When I tightened everything down and pump the primer I get a squeek, which I've heard is the sound that all is well. I've pumped the pump a few thousand times, I've blown out the fuel lines to and from the tank, then sucked fuel back through to fill them. I'm fairly sure there's not a significant amount of air in the system before the ip.
I have run random fuels like wvo and used motor oil through my engine. I have replaced the filters since then twice, and the diesel in there now is clean, there've been several tanks of diesel since I ran dirty stuff. Just FYI, I started at the tank, fuel flows out of the tank without obstructions, then I've worked to the IP, where it seems fuel isn't coming out. Thanks. -Nate
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'82 240D, 4-speed, 617 turbo engine |
#90
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sounds like you do indeed have fuel at the injecton pump. So that may be able to be ruled out for now.
Time to start looking at the injecton pump: linkage to the manual shut off lever. Vaccume shut off valve. you said you have a little smoke out the exhaust? may be there are other things to be looking at, in that the injection pump does not inject a lot of fuel, just a little at high pressure... so may be this is what you are seeing comming out of the #s 1 and 4 injection line.... (injection pump is working just as it should?) What else have you looked at, to isolate this starting trouble? Glow plugs? Started speed? Ambient tempature/block heater? just thinking out loud, may be you have allready ruled this all out.
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46 WDX Power Wagon 84 300TDT daily driver |
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