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I'm not sure what timing should be as well as other things that's why started this post and asked for help with checking Diacom data...
Aug 5, 2026
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OK, more thoughts, a secondary valve spring should only be a factor at higher rpm. Some of the timing readings seem off ? Should be (...
Aug 5, 2026
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Thats correct. Not sure what's the logic of this PCM. Speed and density controlled. There is no IAC just throttle drive by wire...
Aug 5, 2026
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Yes I did remove oil cap - no smoke there.
Did not check timing old fashion but will it work if PCM controls timing and shows already...
Aug 5, 2026
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Tried that while ago no leaks. Sprayed everywhere around intake and injectors. And this PCM wont change rpm even if sprayed engine...
Aug 5, 2026
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There's only the potmeter on shift plate and it sends signal to PCM and PCM controls the throttle body (drive by wire). Is that what you...
Aug 5, 2026
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@muc what do you think of oil pressure?
Only min oil pressure is specified in service manual 41kPa, mine is 280 at idle and 330 at...
Aug 5, 2026
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Fuel quality causing low intake vacuum? Its 95 octane exactly name E10.
Spark plugs are correct.
Aug 4, 2026
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Not sure because nothing showed up on Diacom. Guessing low water pressure
Aug 4, 2026
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Can we now all agree that low vacuum is what I should be sorting out first?
Today checked intake manifold with smoke generator. No...
Aug 4, 2026
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@muc I also checked fuel supply module and it works nearly as it sholud. 1st video - ignition on the pressure goes up to 51psi. Then at...
Aug 4, 2026
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@muc please see the attached Diacom recordings. The engine stopped due to an alarm, so the log is split into two files. Hope this is...
Aug 4, 2026
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After 40 years of working on boats I don't trust those charts.
No mention of elevation.
No mention of ambient temperature
No mention of...
Aug 4, 2026
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No way I thought its gonna be easier than that. Is it any other way to verify timing chain? IDK maybe measurement of valves and piston...
Aug 4, 2026
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I looked at it but there is only about 6 minutes of data after engine reached completed warm up state and during that time and you were...
Aug 3, 2026
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