[Roadsters] Was Engine test results, suspect distributor

[Gordon Glasgow]

Put a timing light on it and watch what happens when you (or a helper) rev
it up. Does the advance jump all over the place or does it advance smoothly?

Gordon Glasgow
-----Original Message-----
From: datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of
hallosb at juno.com
Sent: Sunday, October 04, 2009 10:22 AM
To: datsun-roadsters at autox.team.net
Subject: [Roadsters] Was Engine test results, suspect distributor

I think my problem is my distributor. I found another cap and rotor then,
went
to grab my coil wire from my old Chevy to have a complete set of fresh plug
wires. While I was there, I checked the play in the Chevy distributor rotor.
When you twist it lightly and let it go, the springs snap it right back to
the
home position. When you try the same trick on the Datsun distributor, the
rotor has lots of slop in it.

I'm thinking my distributor is worn and causing my backfire problem. The
engine idles smooth as glass. Engine timing is 16 BTDC on the nose. Dwell
angle 51 degrees.  As soon as you rev it up, it misses and backfires.

What do you think??

Thanks,
Dan McHatton
'66 1600

---------- Original Message ----------
From: "Gary and Cindy Ault" <aultgc at att.net>
To: <hallosb at juno.com>
Subject: Re: [Roadsters] Engine test results, help please
Date: Sat, 3 Oct 2009 23:51:01 -0500

Dan,

I think you should be able to straighten things out via fuel and/or ignition
issues before you pull the motor apart.  A motor which runs fine one day
doesn't suddenly run poorly unles there has been a catastrophic incident.
It's
either fuel or ignition, and I'd vote on ignition.

I'd put a whole new set of wires on the car.  If the plugs are not new,
replace them also.  Cheap way to eliminate those elements as possible
culprits.  Then go back through the ignition -- check the dwell and the
timing.  Let me know what results.  Thanks.

Gary

----- Original Message -----
From: <hallosb at juno.com>
To: <datsun-roadsters at autox.team.net>
Sent: Saturday, October 03, 2009 9:32 PM
Subject: Re: [Roadsters] Engine test results, help please

Gary: The only thing I fussed with between the perfect running machine and
disaster were the plug wires, coil wire, and plugs. I pulled them one at a
time so, the firing order is still correct. 1-3-4-2 is easy to verify, also.
They are indeed 20 year old wires. I replaced the plugs but, haven't
replaced
the wires, yet. On my last run, I stole a set of wires off my old Chevy. The
only wire I didn't swap was the coil wire.


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