CK5
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Injection Timing
- Thread starter calcide
- Start date
arveetek
1/2 ton status
3-5 degrees BTDC is where it is supposed to be set.
Oftentimes, the harmonic balancer marks get "relocated" over time, throwing off the readings.
Casey
Oftentimes, the harmonic balancer marks get "relocated" over time, throwing off the readings.
Casey
René
1/2 ton status
I adjusted the timing after hearing. Between the markings on the pump flange and the cover are now 0.12 in.
Yep, factory was like 3 or 4 degrees. Didn't one of the Four Wheeler magizines do an article bumping up the timing to like 6 or 7 degrees.
I've run into that timing oddity thing, on a low mileage CUCV. The timing was like 24 degrees or something! Couldn't figure out why we got this reading, but it ran good so we left it alone.
I've run into that timing oddity thing, on a low mileage CUCV. The timing was like 24 degrees or something! Couldn't figure out why we got this reading, but it ran good so we left it alone.
René
1/2 ton status
Very strangely!?
But in the meantime nothing more surprises me.
But in the meantime nothing more surprises me.
If you were using a diesel timing tool, did you have an "offset" to add/subtract to the actual reading? OR was the engine fully warmed up (HPCA not activated). Maybe disconnect the HPCA (pink?) wire to be sure the cold advance isn't on.
I've adjusted small diesels (VW, Isuzu, Onan) by ear and been damn close, but the 6.2s seem insensitive (at idle) to injection timing. Them four (and three) bangers can really shake!
I've adjusted small diesels (VW, Isuzu, Onan) by ear and been damn close, but the 6.2s seem insensitive (at idle) to injection timing. Them four (and three) bangers can really shake!
René
1/2 ton status
Pink is the wire to the fuel solenoid. You disconnect it and the engine is off. Green is the right one (HPCA).
With most cars, 5° more or less makes not a different. Not so with some GM Diesel. If I place the pump very in advance, the engine doesn't start any longer. The best adjustment for my engine are 4°. I turned the pump so long on advance, until the engine ran clearly more softly, then again somewhat back...
With most cars, 5° more or less makes not a different. Not so with some GM Diesel. If I place the pump very in advance, the engine doesn't start any longer. The best adjustment for my engine are 4°. I turned the pump so long on advance, until the engine ran clearly more softly, then again somewhat back...
