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#106
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It may just need to be ridden hard and put away wet. My SDL ran like poo when I first started driving it. It's progressed to the point now that it fires up with the flick of a key, makes good power, and runs well cold or hot. Take it out and ride it HARD. It's about the only way to burn the carbon and soot out of the prechambers.
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#107
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Risne - Repeat
Quote:
Then "Rinse & Repeat"
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1986 300SDL 440,xxx |
#108
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Couple weeks ago I took a 300 mile round trip out to Rapidan va, then back to the east coast. I tried my darnest to keep the RPMs at 3000+ the entire trip.
Results after replacing all these parts and going on a road trip???: No more injector knock. In fact, today I routed my fuel lines directly into a bottle of diesel purge, while the engine was at operating temperature....and guess what? It didn't change the sound of the engine at all. So now I'm in the clear. Engine still shakes at idle when cold, and sometimes you'll hear the engine mis because of the incomplete combustion going on. Sometimes when I get off the highway on a HOT engine at operating temperature it will still occasionally 'misfire'. I know diesels don't technically misfrie, but it sounds like the diesels kinda skips and misses it's idle rythm. Kinda like a very brisk 'hiccup' or something. Can I just pull the injectors off and check the prechmabers via visual inspection when I initiate the glow plug cycle to see if they are good? I already installed some new heatshields that the Great Greazzer sent me a couple months ago, so I don't think I have to necessarily get new ones if they are pretty new right?
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
#109
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No need to initiate a glow cycle to check the pre-chambers, just shine a nice bright light inside.
New heat shields EVERY TIME! They deform when you torque the injector to spec. You can bend them back into original shape and re-use, but that would be a temporary solution in my book. They are cheap enough and don't take up much space, just order a couple sets so you have at least one spare set on hand all the time.
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Respectfully, /s/ M. Dillon '87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted '95 124.131 (E300) "Sapphire", 380k miles '73 Balboa 20 "Sanctification" Charleston SC |
#110
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Alright, so I finally got crush washers, I'm going to find out if it's a bad injector or dead cylinder Saturday morning.
Going to swap injector #6 and see what happens.
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
#111
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Swapped and no change. Cylinder 6 and 2 are still missing.
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
#112
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Quote:
Stop guessing and find out what's going on. Do a relative compression test and report back the values for cylinders 1-6. If your compression values are normal-ish, it's an injection problem. If you have injection or timing issues, you can have a "soft" miss which is a cylinder that fires, but out of time or weaker than the others. |
#113
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I'd love to see a video of this quote on quote misfire. I feel I can help you and everyone else can with a video. There's a difference between a miss and rough idle like Diseaseal said. I can send you a video of a misfire, it was my 98 E300 with a bad injector pouring white smoke and the engine rocking violently all over the bay like it didn't have motor mounts. That's the difference.
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Only diesels in this driveway. 2005 E320 CDI 243k Black/Black 2008 Chevy 3500HD Duramax 340k 2004 Chevy 2500HD Duramax 220k |
#114
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To me a miss is what happens when you start the engine without using the glows or with several dead glow plugs -- lots of sputtering, shaking the whole car and huge puffs of unburned diesel (white smoke).
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RenaissanceMan Labs: where the future is being made today. Garage: 2017 Chevy Colorado Diesel (nanny state emissions) 2005 Volvo S40 T5 AWD, 77k 1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg 1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg WARNING: this post may contain dangerous free thinking. |
#115
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Quote:
Quote:
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
#116
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Quote:
Don't I have to remove the valve cover to see if any other piston other than #1 is at TDC? Also since the combustion chamber is or combustion space is much smaller on a Diesel, therefore compression is much higher, will that give the leakdown tester a false positive of a nearly leak free cylinder?
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. |
#117
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You need a compression gauge ($30 at Harbor Freight), not a leak-down tester. The leak-down tester is useful for finding out WHERE your compression loss is. If you do a relative compression test and all of your cylinders are low (say 325PSI), but relatively even, the leak-down tester will tell you where the compression loss is, but not why your operating state is so rough.
The compression tester will tell you which cylinders are low, if you have a pair that are low (indicating a blown head gasket between adjacent cylinders), or if the mechanical health of the engine is ok and you need to look at fuelling and timing instead. |
#118
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This sounds more like injection problems or timing issues. since you have a different result when killing 6 or 2, you know that they ARE firing. That is not a "miss" or "skip".
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#119
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The car ONLY has reduced smoke when cold if lines 2 AND 6 are cracked open.
Even at operating temperature the car still has a rough idle. Glow plug relay is reading all the glow plugs to be at 0.5ohms . Glow plug voltage is at battery level too. As shown in the video, car starts easy with no problem. I have installed new hydraulic lifters Injectors rebuilt by Greazzer Had a diesel purge a couple weeks ago as well. Idle is set at the default mechanical setting, where idle rpm is at the lowest. Cracking the lines seems to have almost no effect on the idle of the engine too. With the new video what do you guys think it could be? I'm in the works on doing a compression test, a leak-down test, and inspecting (and if needed...correcting) the injection pump timing, engine and cam timing. I personally suspect it to be low compression, but I guess one or two extra guesses or even more is better than one here.
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily 1992 Mercedes 300D 2.5 202,000 - Pure junk 2000 Mercedes E320 Black - 136,000 miles - Needs repair Don't forget to grease the screw and threads on the spring compressor. Last edited by Father Of Giants; 10-23-2017 at 09:04 AM. |
#120
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Good video, that helps! I agree with the others, you've got a weak couple of cylinders, but not total misfire / no fire.
Quote:
I've got to go back and read up on what else you've done so far, any other symptoms you mentioned.
__________________
Respectfully, /s/ M. Dillon '87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted '95 124.131 (E300) "Sapphire", 380k miles '73 Balboa 20 "Sanctification" Charleston SC |
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