502 Carb Runs Fine Except Won't Turn Over 3500 RPM
10-16-2017, 08:16 AM
#21
Registered
iTrader: (3)
it sounds like you have msd ready to run distributor,s,a buddy had a problem with one shortly after installing it,the internal module acted up and the engine did exactly as yours.another thing to check is what the rev limiter is set at,i know of one that reset the limiter to 3500 rpm by itself,the cure was to follow the directions and reset the rev limit.you may have a fuel problem,make sure the fuel lines are tight on the suction side of the pump.good luck.
10-16-2017, 09:38 AM
#23
Registered
Thread Starter
Join Date: Feb 2008
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
With the distributor problem did it break up or just not rev? I do not think mine is breaking up but it's hard to tell. It just seems to be running fine at 3500 and more throttle does nothing.
10-17-2017, 03:09 PM
#24
Registered
Really sounds like it is running out of fuel to me. I think I would do like someone else suggested and rig the fuel feeds so you are using the opposite pumps and see what happens. Really does not sound like ignition.
07-16-2018, 08:51 AM
#30
Registered
Thread Starter
Join Date: Feb 2008
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
Finally found problem after doing compression test. One rocker arm nut had backed off enough to let rocker fall off to side of push rod and intake valve was not opening at all so only running on 7 cylinders which I couldn’t hear. Surprisingly no damage. Fixed with a replacement nut with new insert that wasn’t stripped.
