Thanks guys there are a few things you mentioned there that I havent looked
at. Terry, it's not a miss every cycle, but it's quite regular like 1 to 2
times per second. The exhaust is broken and it makes a loud rattle evrytime
so I know when it's missing (handy for almost deaf people like me). I havent
tested compression. The coolant does have a film of something on the surface
but it's not getting into the oil AFAIK that would cause the oil to turn
into "snot". I could very well be air getting into the manifold, the motor
is out of a newer 200B and it ran beautifully in that car.
The eccono-gauge ;-) reads fairly smooth when it's doing about 1500 RPM but
at 850 RPM idle (that I was able to set myself) the needle is jumping all
over the place in the 'idle' section of the gauge
So should I rip the brake booster off and plug it up and same with the
vacuum line (to test it?) . I think I will try that tomorrow if I can find
the ignition key to it...I lost it :(
Rick, by condensor you mean the thing in the dizzy? I put in a electronic
one, and I didn't recall seeing a condensor. The wierd thing is the miss is
exactly the same as with the old dizzy with burnt out points and the new
electronic one. So I am wondering whether is is electrical at all, since you
guys have mentioned mostly anything BUT electric.
There was also a capacity on the coil, is that to filter out interference
from the radio? I wouldn't know I ripped the radio out and replaced it with
4 gauges and a LED voltmetre (ooo sports dash ;-)
Another thing Terry, I turned the crank to 0 degrees and the rotor was
pointing to the firewall drivers side...and cylinder 1 is the firewall
cylinder. I tried it set to the standard Datsun way with cylinder 1 at the
radiator, and passenger headlight on the dizzy, and then 1-3-4-2
anticlockwise on the dizzy (my friend also told me to do it this way) and it
didnt start, just backfired. Has someone rebuilt this motor to non-Datsun
standards?
----- Original Message -----
From: FJ MAN <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, April 30, 2001 5:39 PM
Subject: RE: The "Datsun Miss"
> Dont suppose you used the same vacuum advance line each time?
> Coz if there's a hole in it you may end up with symptons like yours. I had
> the same problem with my 180b recently and replaced coils plugs many times
> leads etc all parts then saw a tiny hole in my vac adv line. Doh ah well
> might help ya
>
>
> >From: "Terry Rudd" <[EMAIL PROTECTED]>
> >Reply-To: [EMAIL PROTECTED]
> >To: <[EMAIL PROTECTED]>
> >Subject: RE: The "Datsun Miss"
> >Date: Sun, 29 Apr 2001 23:21:59 +1000
> >
> >Paul,
> >
> >Have you done a compression test or tested for a leaking head gasket
(leak
> >down) or are you losing water. You say it's a regular single miss so I
> >take
> >this to mean that it's missing on every cycle or there about. If this is
> >the
> >case then the cause should be east enough to find as you only need three
> >things to fire; i.e. compression, correct fuel/air mixture and strong
> >regular spark so check it all out.
> >
> >#1 cylinder on a north/south engine is closest to the radiator and also
the
> >lead is the one pointing towards the passenger side headlight. The
cylinder
> >you have described and also the dizzy position is #4. The timing on a 4
> >cylinder 4 cycle engine is the same for #1 and #4, only the
camshaft/valve
> >position when either piston is at TDC determines the difference between
the
> >compression and the exhaust stroke.
> >
> >LRP petrol will not cause misfiring by itself, granted the plugs do get a
> >little dirtier than when run on super but ulp & pulp petrol burns much
the
> >same as LRP (it is pulp with a lead replacement additive) so you wont get
a
> >steely grey exhaust burn anymore, rather blackish in colour and the plugs
> >seem to burn with a reddish tinge which I suspect is the additive. If you
> >suspect it's something to do with LRP, may be worth sticking a tank of
> >optimax through it and see what happens. Check that the carbie, the many
> >vac
> >lines attached to the stock carbie or the manifold are not leaking
vacuum,
> >also check your booster valve is working correctly.
> >
> >have fun, hopefully it's something simple to rectify,
> >
> >regards
> >Terry
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> >[mailto:[EMAIL PROTECTED]]On Behalf Of Paul W. J.
> >Stanley
> > Sent: Saturday, 28 April 2001 11:50
> > To: OZDAT Mailing list
> > Subject: The "Datsun Miss"
> >
> >
> > The Datsun Miss is still haunting me. Now I have an L20B in the 200B
> >with
> >the standard downdraft carby, and I assumed the mmiss was from the points
> >that looked as though they had done 100,000km so I had the pleasure of
> >vulturing my friend's L20B since he has fitted a fancy CA18DET. Anyway I
> >fitted the electronic dizzy and after figuring out that my cylinder 1 was
> >at
> >the back (firewall) of the engine, and the back driver's corner of the
> >dizzy
> >(is this normal?) only to discover the miss was still there.
> > Now I'm suspecting either a combination of LRP and dirty carby (doubt
it
> >though...it's not a flat spot...just a regular single miss)
> > Or it could be the old conections and wires powering the coil...need
to
> >replace the 70s ones with new millenium ones maybe. I've tried numerous
> >leads and spark plugs, checked all the gaps etc
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