All right,
My trucks don't exactly fall quite within the category of a "'41-'59 GM or
Chevy." However, within the next few weeks I will be purchasing a '55-'57
Suburban or Panel, to be converted it into a "Blazer" so to speak, with a short
wheelbase and one piece rear quarter windows (no post). Right now I own a '61
step and a '64 fleet, both shortbeds. So, my question is this; I know you've
all experienced this one. You take your newly waxed truck out on a nice clear
Sunday afternoon drive. You reach your destination and pick a spot to park in.
With on-lookers admiring your Oletruck you pull in and twist the key to the
left. But instead of the tach quickly dropping to zero, the crank almost stops
turning, only to change its mind and give a few more kicks! Sometimes it sits
there, sounding like a dying animal for up to a minute. It almost sounds like
it's turning backwards. In fact, the next time it happens I should jump out and
pop the hood to see.
So, I've been told that if the timing is too far advanced, it can cause
this. What I don't understand is why there would even be spark with the
ignition cut off. In which case, the timing shouldn't matter, right? I do know
that it only happens when the engine has had time to warm up (at least a 10 min
drive). And, it seems the warmer it is, the longer it takes to die. Could the
cylinders/head be hot enough to ignite the fuel? This is a 235 in the '64
fleetside by the way. I'll try to adjust the timing when I get a chance, but,
if that does fix it, I'd still like to know why.
Mike Dempsey
Pre '67 Fan
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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