muc's latest activity

What do you see wrong with fuel consumption? It's tracking with MAP, Demand and RPMs O.P. has never stayed stable on the throttle long...

Nope, not needed with this system, just like no knock sensors. Only used on the new stuff that has VVT - variable valve timing.

This engine adjusts timing for each cylinder separately. And like I said #s look normal. You wouldn't check timing with a timing light...

Spark advance looks pretty good to me. But once again --- low cranking volts could affect this. Did you mean ° degrees or % percent...

I really don't think you have a problem with lifters or cam timing. Your fuel trims look too good. But if I had some good O2 numbers I...

Didn't know you were on the other side of the pond! I have NO idea how this might affect anything. The only thing I know about prepping...

What should be 5-15%?

NO. I keep saying these MAP readings are normal. While I don't have any other 4.5 Diacom REC files to compare (I have always used Mercs...

Uhm, sorry to sound naive but have you checked the actual fuel quality and actual octane content. Maybe a tank of high test ...

What was the alarm?

My bad! I missed that this ISN'T a cat engine. Please disregard everything I said about PID, O2 and Misfires.

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...

That chart is at idle. But you posted. "Fuel pressure steady at 45psi - checked under load while on plane." Under load should be about...

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...

I took a second look and I'm not sure this was a warranty return. It was registered by the warranty department. It was auctioned with a...