Re: Mooing Rambler - BACKFIRING - timing chain wear check...

["Jim Blair" <carnuck@xxxxxxxxxxx>]

A: Sure sounds to me like either mixed plug wires or that balancer slipped a 
long ways and it's time for a new one. (if the motor runs smooth otherwise, 
it's just too much gas going in and causing it to miss) Are you missing the 
wingnut for your aircleaner by any chance? Sticking valve maybe? Bent 
exhaust pushrod or broken rocker (when you did the compression test, I'd say 
it was one with the highest reading) Try disconnecting the plug wires one at 
a time then start the car. Whichever one makes the backfire go away is your 
culprit. Flooding can make it do that as well.
   Did you change the coil? If there is no resistor on a regular coil there 
will be misfire. Old gas can cause misfire till it's burned off. Try 
spritzing a little wd40 down the carb while it's running. It could also mean 
you need an idle mixture adjustment. Do you have a dwell meter? I'd check 
the points adjustment and then use the RPM gauge to set the idle mix 
(alternatively, you could use a vacuum gauge to set the idle mix.) Set it to 
highest manifold vacuum or highest RPM. If the RPM goes too high, adjust the 
idle back down and readjust the mix again. Do NOT turn the needles in too 
tightly or it will ruin the carb!



 Jim, Jerry, and everyone else,

It is backfiring at idle. No gas.  In other words, i turn the car over, it
idles, and backfires continually. (not every second, but putt putt pop putt
putt pop pop putt putt...etc)

One thing I noticed.. I can turn the fan by hand easily without turning the
engine (the belt slips). I also noticed while it was running at idle that if
i watched the front crank bolt (where you turn the engine by hand) it seems
to wobble a little, or at least im seeing vibration.

Give any clues?


----- Original Message ----- 
From: "Jim Blair" <carnuck@xxxxxxxxxxx>


> A: When you apply the throttle it backfires? or when you back off after
> revving? If after revving, then you have a leak someplace.
> From: Jerry Casper <gremlingts@xxxxxxxxx>
I forgot to mention.. its backfiring thru the
>> exhaust, not out the carb.


> Brian, have you checked the timing chain for wear?