Any thoughts on this engine issue

spinman1949 said
Demon,

Did you indicate the timing is fluctuating? If it is then you need to find out why. If the diss is correct you should not be seeing any advance at idle. And I know you do not have any vacuum hooked up correct? So if the diss is not providing any advance at idle and there is not vacuum advance to deal with, then if the timing is moving around more than a degree or two at idle then something is not right. And keep in mind that you are only seeing what is happening at # 1 TDC.

I understand that everything is new in the engine, but unless you happen to have all bad carbs. All bad diss. All bad ECU's, Or have an electrical problem beyond any level of understanding, you need to look at what you do know. So is the timing moving around? If it is then something is not right.

It was moving around... but we solved that issue... not it is only moving a couple degrees... so yes it is still moving but not as bad....

I just sent the video to the guy who built the engine Tim Bowman @ Bowman Performance... hopefully he can help shed some light on it as well.

FYI -- No I have not driven the car with this motor in it... I don't want to drive it with with such a bad bucking issue. I don't have unlimited pockets if that does more damage to the motor or the car, so I want to get this fixed before I attempt a road test.

We will definitely figure it out. I'm hoping the builder has more detailed notes than just the receipts I have. This way I can open it up with having firm details on whats in it and can check with what it should be... I would prefer this than just exploratory engine surgery....

Thanks for all the help and thoughts... they are helping us rule out things and keep our sanity at the same time.