[T2] Power loss in 4th

[Avocado Tom Tarka]

Jamie,

I think you were close with this, but I believe it was actually a bad helicoil someone put in the #3 spark plug hole: as soon as it got hot enough, it would lose compression and power.

Helicoil came out when I was trying to do another hot compression test.

Thanks!
    Tom

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On Oct 31, 2015, at 4:18 PM, Jamie <jrivers at globalserve.net> wrote:

>>> John Rogers  wrote:
>>> 
>>> I am still convinced until proven otherwise that this is a case of
>>> pre-ignition. It has all the symptoms -- starts fine, runs OK until warm,
>>> then loss of power.
> 
> 
> my wild ass guess is ... dropped valve seat...... the seat is in place till the head warms up,, then starts to rattle around and cause all kinds of issues.
> best way to find out.. use a VAC gauge on the manifold ... when you see that needle flicker ,, sigh,, you will know ..
> you might  run some hose to the dash so you can watch it while driving , if it doesn't act up as soon as you put the gauge on.
> 
>