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#1
12-18-2002, 09:17 PM
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Finally, an easy way to set injection timing
I finally found a diesel pulse adaptor for my advance timing light on Ebay. Snap On wanted $314 for it but patience paid off and I got one for $99 Buy-it-now. For those who've never seen one, here is the link to the Snap On catalog:
http://buy.snapon.com/catalog/search.asp?partno=mt257&search_type=Part&store=snapon-store Another use will be the inductive tachometer feature of the Fluke 88 multimeter. Setting idle speed will be a little more accurate than using the dash gauge. It's funny, I've been a mechanic for 20 years and I still get excited when I get a new tool! 
__________________
83 M-B 300D- daily driver 83 240D gray market 2002 VW Jetta TDI- beater 
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#3
12-19-2002, 07:08 AM
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A clamp is placed over the #1 injector line, when the pump sends fuel, it sends a signal to the box. The box triggers a signal to go through the high tension lead(loop) that you put your inductive pickup from your timing light on. That makes the timing light flash. Then you use your timing light just like on a gas engine. If you have an advance light, you dial in how much advance you need, then make the marks line up on 0 degrees on the damper.
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#4
12-19-2002, 10:12 AM
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Diesel 924,
I agree that a dynamic test is better because you can also check to see if the advance mechanism is working. How do you know what the correct timing setting is because the MB settings published are for the cut off point of the injection pump and not the true timing of the fuel injection? P E H
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#5
12-19-2002, 11:45 AM
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Quote:
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#6
12-19-2002, 02:06 PM
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Yes, that's why they call it "start of delivery." I expect the timing light will match up very closely with the start of delivery spec.
These are nothing more than a piezo electric device with an active device to match the level required by the timing light. They've been around a long time. Good luck,
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#7
12-20-2002, 12:20 AM
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24 Degrees BTDC? I would think the engine would fire too early and kick backward.
You could attach the timing device to a good running engine and see what it reads. I would think it would be much closer to 0 TDC than 24 BTDC at idling and then the timing should get earlier with an increase in engine speed. Let us know what you find. P E H
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#8
12-20-2002, 02:09 PM
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The numbers published by MB (24 BTDC for wet methods, and 15 ATDC for RIV method) will have absolutely ZERO meaning when using an inductive/dynamic pickup off the injector line. Please, don't even try. What you need to do is set a car up the old-fashioned way FIRST, with the wet (drip/bubble) method or the RIV (lock tool, for later engines) method. Set it exactly to fatory spec. Then connect your fancy meter and see what it reads. Let's say it shows "X" degrees on the damper. Now you can set up other cars to "X" degrees and be fairly certain of the accuracy.
I'm willing to bet that "X" is neither 24 BTDC nor 15 ATDC, and not anything within 1 degree of that. I am very curious as to what it will be, if anyone ever does this... Regards,
__________________
Check out my website photos, documents, and movies!
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#9
12-20-2002, 07:19 PM
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I was talking to the local Snap-On man today.. He had one on the truck and it sells for $175... Sounds like it may be a good deal... However I have no clue where the find the settings for using it... Talked to him but he did not have any answers.. Going to check around and see what I can find... Odds are the Shop in Medford Ore that rebuilds the pumps and injectors may know.. But we are snowed in here.. I-5 Closed over the Siskiyou Summit and Going south at Mt. Shasta... I think I would be a bit better off to drop in and talk to them than to call.. Oh well Guess I can just set here and watch it snow for now..
Ken
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#10
12-21-2002, 12:01 AM
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gsxr,
That's exactly what I was thinking. P E H
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