Ferrari Mailing List: 308GT4 (or any) plugs

[Rick Lindsay (rolindsay]

Indeed!  I didn't take the necessary care to ask if
the car was Euro or US spec and I'm certainly no wizz
on GT4s but I do have a carbed, Euro GTB.  It has TWO
ignitions and eight carb chokes!  Yeeehaaa!  Lots of
places for things to go wrong - and right!

If one bank is different, ignition is implied.  If one
cylinder is different or two sharing a DCNF,
carburation/mixture is implied.  I've even found an
incorrect spark plug in a correct box before! Occum's
razor says check the simple stuff first.  e.g.
mal-adjusted carb rather than a worn cam lobe.

Another important question is: How does it run? 
Strong throughout the range?  Any chance of a high rev
miss?  Something that feels like a rev-limiter?  That
is a classic indication of an ignition running out of
steam - so to speak.
--- Doug and Terri Anderson <dnt [at] dock.net> wrote:

> Rick asks "Quick question: Do all of the plugs look
> similar or is one bank 
> different; or one plug different?"
> 
> GOOD point Rick - for all intents and purposes, the
> gt4 engine is really two 
> 4 cylinder engines held together by a common
> crankshaft and cylinder block.
> 
> DOUG