Ok, so now that everybody is done flashing thier brain stems let me ask this. Can I leave the injector line attached but unhooked from the injector and simply watch for when the fuel flow stops? Again, not dead on accurate, but should be real close. The only variable I see in that is the length of the injector line. Since its longer, one would have to allow for the time it takes to drain that length of tube after flow stops so as not to overshoot the mark. If it works, then its at least a way to ballpark timing if you dant have one of those fancy MB drip tubes.

Do you have some religous objection or something to doing it like the Factory manual says, with the cheap easy to fabricate tool which the Factory shop manual says you need to find the one drip per second setting of the pump ?

Leathermag, I have seen discussion that the tube is a better system and common sense says it is. What really disturbed me about the well up method was the valve is left in place, if I have it right. I know that hydralic compression of a fluid basically does not alter volume much but would perhaps aid in creating leakage in the pumps piston area at the very low rotational speed. Almost non existant during the test. The small force component required to open the delivery valve for example does apply a little reverse pressure. If a small leakge factor was present in the pump it would cause a slightly later welling up I think. The test by Interpretation of a drip has to be a better thing than trying to determine the initial emergence of a fluid in a hole as well. Add to that one should make sure that the material used to clean fuel out of the well should be absolutly lint and dirt free. One of the important design paremeters of any test is to make it interpretable and with as few variables as possible. The drip test just qualifies better in my opinion on all counts if I have my facts straight. Although to be fair doing even the well up test has got to be a lot better than not doing or ever checking your primary pump to engine timing. I was just trying to add a little levity earlier to lessen any tension buildup. I failed apparently.

I am going to have to be blunt to help you with this.
You are completely misreading the physics of the situation.


"Ok, so now that everybody is done flashing thier brain stems let me ask this. "
This is our only hobby , give us some room to flex....

Can I leave the injector line attached but unhooked from the injector and simply watch for when the fuel flow stops?

Yes, except your resistance to using the DRIPPING rate is beyond my comprehension...


"Again, not dead on accurate, but should be real close. "

The problem is you don't know HOW close it is.. and I don't either... you are having problems with your car... accept the Factory instructions unless you know more about your system than they do... or expect to have periodic problems like this dealing with your car.


"The only variable I see in that is the length of the injector line. Since its longer, one would have to allow for the time it takes to drain that length of tube after flow stops"

Get off the flow stops deal... you can use the line but due to the length you simply have to wait longer for it to fill up... after that it makes no difference how tall your ' drip tube' is...


"so as not to overshoot the mark."
Work slowly so the effect of changing the IP position is able to be reflected in the drip rate.

"If it works, then its at least a way to ballpark timing if you dant have one of those fancy MB drip tubes."

Is that the deal ?... you consider my home bent hack saw cut drip tube " FANCY " ?

"What really disturbed me about the well up method was the valve is left in place,"

WHAT ? You have to take that deal out for this drip method to work...

"The drip test just qualifies better in my opinion on all counts if I have my facts straight."
You do, it does, now, can we convince Endust of this ?



"Although to be fair doing even the well up test has got to be a lot better than not doing or ever checking your primary pump to engine timing. I was just trying to add a little levity earlier to lessen any tension buildup. I failed apparently."
No you did not fail.. that is why I tried the same.. but if you think you failed it must mean I failed...

Im not tense Its not religion that prevents me from doing it the way the factory manual says. I just dont have a box full of injection lines to hack up to make my own. I also dont have a pick and pull to go scavanege them out of. That leaves me with doing nothing until I can buy and have shipped a drip tube, or asking this fine forum for alternative, outside the FSM methods to acomplish my goal. So, to get back to it.

Drip is not something to be so hung up on for what Im looking for. The drip tells you you're at the point in the piston travel that the spill port is just about covered. Stopped flow is too far, full flow is not far enough. Like I said, Im just looking for close here. If I get stopped flow at what looks like 30 degrees on the balancer then I know im 1 tooth off on my pump since its set at full retard on the slots.

This discussion for me isnt based on getting 24 degrees dead on. Thats for a time after I fix the other issues. Im looking to find a way to figure out if my theory that the pump is 1 tooth off is correct.

I also feel that by exploring alternatives sometimes you can hit on something useful. The milivolt method isnt in the FSM and I think everyone would agree its pretty interesting.

"Drip is not something to be so hung up on for what Im looking for. The drip tells you you're at the point in the piston travel that the spill port is just about covered."

Could that be " uncovered" ... as in the first part of the injection cycle for that piston as compared to the end ? I don't know but it could mean several degrees of crankshaft rotation..

Just a question:

When you are doing the well up test, is the rack fully open and held there?

Brian,
No, the rack was at idle. I could try it at wide open to see if my results change.

I am going to try several different methods tonight to see what kind of results I get. Like leaving the line attached and looking for flow stopage, flow with nothing on the port, and now welling up method with rack open. I will post the results when I have them.

Do you think rack open will make the welling up method easier to read?

The FSM specifically states that the rack has to be fully open for checking the timing via the drip. Others have done it with the rack closed and claim the same results. YMMV.

I have not looked at the manual.. but I thought the IP was supposed to be wired in the full open position for the drip method ?

...........you're a smart boy...........

You posted while I was composing...

"the welling up method easier to read?"

How exactly DO they describe what you are looking for ?

Like tears welling up in your eyes at a funeral ?
Like tears welling up in your eyes at frustration when you can't get the Welling up method to work for you ?
Like sweat welling up on your forehead from being bent over the fender until your back goes into spasm ?

............

I type faster than you do...........