[Schrade]

It went to 0 post 15 minutes.

Second test pump #1; went to 52 again much quicker, and heard the pump.

10 seconds; power off. Drop rate much slower - post 3 minutes, it's steady at 24.

15 minutes post power down; still @ 20.

Test 3rd time shortly with stopwatch.....................

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Test 3:
Power off
0:15 - 44
0:30 - 40
0:45 - 39
1:00 - 37
2:00 - 34
5:00 - 28

Getting better each time.

Q: Where does the air go, that was in the line???

Does it get pushed to the tank? Does any remain in the INJ's, or rails, until it's run??????????????

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Should I test until I get no leakdown?

Or go ahead and test with both pumps?

OR,

Test pump 2 isolated?


Test 4; identical readings.
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So I held the guage pressure relief, and bled air, till it ran no air.

5th test; identical readings @ 15, 30, and 45.

If the primary pump has a check valve integrated (and it's blown), then another test WITH pump 2 + pump 1 should yield identical results, with the [blown] primary check valve still leaking.

I had good static pressure before this plenum pull

So now, if pump 2 can be tested in isolation, I can find out if pump 1 has a bad check valve.

Hopefully, it does NOT, and one of the injectors is leaking PROBABLY because a pintle is jammed open. Pulling each spark plug and checking for fuel should confirm this.

Thoughts????????????????????

Hello?