I'm assuming you did use some high octane fuel, and the problem went away.
Did you degree the cam, it's possible to have it off and have higher cylinder
pressures than you planned.
Are you running a stock PCM, if so what size injectors?
Good luck
> Hey all,
>
> Just another update on the 390 project. I have had her going for just
> over a week now and have had a weird valvetrian noise that I thought was
> just
> a roller rocker adjustment prob. I readjusted all the rockers yesterday
but
> no dice, still makes a "dieselling" sound under load below 2200rpm. So I
> called Hughes engines and they are pretty sure it is detonation.
Apparently
> the computer does not agree with stroker kits and cannot retard the timing
> as
> needed to suit. The fix is to either run extremely high octane fuel all
the
> time or install the $450 knock sensor kit. I chose the latter. The kit
> should
> be here in a day or two and is not only adjustable for sensitivity but
acts
> as an ignition amplifier also (like an MSD or equivilent). How many more
> glitches can I run into!? oh well, such is the life of a custom hot rodder.
>
> John S
>
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:09 EST