I have a 350 with a tunnel ram and two 4s. My distributer is stock with the points removed and a pertronics module installed. Everything is new including the motor, heads, everything new. It has ran fine for a couple of days but today it has started popping, I think out of the front carb. It doesn't lose power it just pops. Not sure if its a timing issue or what. Any ideas?????
It could be alot of things, there are some recent threads on here about tunnelrams do your research on those threads. As far as "popping" I'm thinking a new motor could have wiped out a cam lobe, or valve adjustment could be wrong on a front cylinder, somewhat bent pushrod, so on and so on. Mabey the front carb is leaning out, check the fuel in the bowl to see if its being pumped in, also check pump pressure I doubt its timing. But you get the idea, start looking at stuff. Good Luck. Normal Norman
How close are your plug wires to each other? I have seen plug wires that are tie wrapped together and will jump spark from one cylinder to another cylinder. This can cause the plug in one or more cylinders to fire at the wrong time? Is it a solid cam? possible lose poly lock causing an exhaust valve to be hanging open just a touch? Could be many other things as well Rod
I hope it's not the cam. I just got it running and on the road. It's not a solid cam and I have tried to separate the wires the best I could. I have never had any luck with motors.............. Sent from my iPad
Well today was the first day I was able to work on the motor. I first tried to work on the timing and couldn't get that to work right so I tried the next task. I took off the valve cover on the driver side to see I could see anything wrong. Everything visually looked good. Rockers were all snug so I went to the driver side. Took the valve cover off the driver side and on cylinder 2 the rocker had a 1/4 in gap between it and the valve spring. So after setting all the valves the "popping" noise is gone. Thanks for all the good advise. Sent from my iPad
The Jalopy Journal
