Re: Missing cylinders

[Jim Altemose <jaltemoose@xxxxxxxxx>]

Thanks Stan.

A backfire now and then but not normally.  Maybe a little more now
that I have 3 missing but I haven't run it much other than idle since
this started.  BTW, I have about 82,000 on the original motor.  I use
NAPA gold synthetic oil with ZDDP additive.  But I've only put about
6,000 or so on it.

I'll try pulling the valve covers, thanks.

- Jim
Jim Altemose, Long Island, NY
'63 Polara 500 (Max Wedge)
'63 Polara 500 (383)
'65 Belvedere I (Street Wedge)
'71 Bronco

On Tue, Nov 22, 2011 at 4:58 PM, Stan Kafouse <skafouse@xxxxxxxxx> wrote:
> Pull your valve covers and check  to see you have not wiped the cam.  Spin
> the engine over and see what the valves are or are not doing. Valvoline
> racing blend is whats needed to run a flat tappet cam. It has the zinc and
> phospate needed.  If the valves are not or barely opening the the valve
> timing is all over the place. Thus a very rough idle. Is it back firing thru
> the carb when you rev it up? Back firing thru exhaust?
> From: Jim Altemose <jaltemoose@xxxxxxxxx>
> To: 1962to1965mopars@xxxxxxxxxxxxxxxx
> Sent: Tuesday, November 22, 2011 4:51 PM
> Subject: Missing cylinders
>
> My 63 Polara with 383 4 barrel AFB has been running rougher and
> rougher.  I'm now missing on 3 cylinders.  I'm going to be doing some
> deeper diagnosing over the holiday weekend but I'm hoping to get some
> initial thoughts.  I had enough time the other day to pull plug wires
> from the distributor while idling.  For sure 3 cylinders are missing;
> when I pulled them it made no difference in the rough idle.  They ARE
> getting a spark at least when I hold the end of the cable over the
> vacant distributor hole.  I didn't have time to figure out exactly
> which cylinders are missing; I'll do that this weekend.
>
> Plug wires are only 2 years old.  So is rotor and distributor cap and
> plugs.  My plan over the weekend is to pull the plugs and check for
> fouling.  Then I was going to check the timing.  Someone suggested the
> ignition module might be the culprit.  Does this make sense?  Is NAPA
> a good source or should I be looking elsewhere?  I don't have points;
> I have the 'magneto' inside the distributor but I'm not sure whether
> it's Pertronix or what; I'll post a picture.  It was there already
> when I bought it.
>
> If plugs are wet and fouled, I thought I'd try to adjust the idle
> mixture, which I'd been planning on doing.
>
> Any tips on what I should be looking for that would cause 3 cylinders
> to miss?  Maybe vacuum leak?  I was missing 1 or 2 at first, then the
> 3rd went.  I'm surprised it runs as much as it does on 5.
>
> As always, thanks.
>
> - Jim
> Jim Altemose, Long Island, NY
> '63 Polara 500 (Max Wedge)
> '63 Polara 500 (383)
> '65 Belvedere I (Street Wedge)
> '71 Bronco
>
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