I have use two different pressure gauges. I measured the pressure at idle and watched the pressure while under load at WOT and pressure never dropped too low (never went below 45 psi if I can recall)
Then no issue
Usually when they tell you to use a test light it's because they want a lower resistance device in the circuit than a DMM. Sometimes to trigger another component.
Your high pressure reading should be near 60.
Good to know wrench, thank you! I have purchased a test lamp and will go through the service manual steps again using a test lamp when I de-winterize.
Thanks Brich. From what I remember, the pressure was 55-60 at idle and never dropped below 45 at WOT under load. What I can't remember is if stabilized higher. Another thing to test again when I can put the boat in the water.
It should not drop below 55
It has been awhile since when did a 5.0 get vvt, 2oo4 penta using Mefi, just how does your timing jump that badly at low rpm...GezzI loaded my Diacom SW and ran the recording . . .
The two '41' codes are present as stated. This engine (MEFI-4) is a lot newer than my engine (MEFI-1), so I'm not familiar with some of values . . .
Here is a clip of the values while the engine was run up to WOT and then back down.
It looks like this engine has variable valve timing (???) . I'm not sure about the 45˚ +/- readings . . . I saw somewhere on the Internet that the MEFI does not give the best reading for this vs. automotive OBD2 data.
What is the history of this engine/boat? Did it ever run properly? Is there MEFI data from when it did run properly?
I would address the 41 codes (open circuit on EST module ??? maybe) Might that be a wiring issue? Then see where that leaves you.
34˚ timing advance at WOT does seem a bit high, but maybe it is OK. I wonder if it is trying to compensate for something that the ICM is not doing.
And your knock sensors have been disabled?
Looking at Ted's readout the knock sensor is OFF, and no codes
While I cannot be sure it looks like a custom tune, easy enough to happen. Somebody sells a product on eBay stating Volvo ready. Looks like a big mess from here..I'm quite sure penta went to its own software in 02
LOl im getting so old it hurts, i was under the impression that vid file was the original file...Hmm maybe Ted has a connectivity issue..JK.
Its a VP with S/N 4012107862
It would seem VP changed injectors in 05
That could well be, this is a mefi 4 system, and Diacom is interpreting the reading's. I would find it strange to report a circut off when it is actually operating. Then there is the rev limiter being reported in the same manner so perhaps your right.
Thank you tail gunner and alldodge. I am learning a lot reading your responses. Got any tips on how to properly phase HSV (which I will stop calling a distributor, lol)?
