[Roadsters] 1970 SPL311 Engine Problem.

[Gary and Cindy Ault]

Pete,

Your message didn't say anything about how the valves were set, nor what 
measurements were taken to ensure that the lift and duration are uniform on 
all four cylinders.

#2 is essentially fed from the front carb, and #3 from the rear.  If #1 and 
#4 are running OK, the answer would appear to be with something other than 
the distributor or carbs.
Gary

----- Original Message ----- 
From: "Pete Koernig" <tpb73 at yahoo.com>
To: <datsun-roadsters at autox.team.net>
Sent: Thursday, May 10, 2012 8:33 PM
Subject: [Roadsters] 1970 SPL311 Engine Problem.


> Rebuilt engine, threw mass quanities of new parts at it in addition to 
> redoing
> carbs,  new points, plugs, wires, cap, condenser, etc etc.
>
> Here's the heart
> breaker:
> #2 and #3 cylinders are not producing. #1 and #4 are fine, pull wire
> on 2 or 3 and rpm drops about 20-30 rpm. Pull  wire on 1 or 4 engine 
> falters
> unless reconnect  to spark plug.  Good snap acceleration. Uni-Syn pretty 
> well
> matched (considering engine miss).
> Much black smoke --- engine running rich to
> keep running about 1000 rpm.  All four cylinders test 155 to 160 pounds
> pressure at cranking speed. Cannot detect an intake manifold leak.
> Enough
> spark to melt your ear wax, to all four cylinders.
>
> Now what?
>
> Pete Koernig
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