PCV valve? valve lash? i need some help
hey guys, i just got my exhaust finished on my car and now the engine is running. i had it out over the winter and did a full rebuild on it but...
when the car is at an idle it makes a popping noise out of the passenger side exhaust. its not all the time, its very random almost sounds like a misfire or something. it doesn't get worse nor better as the car heats up. but it will go away for 30-45 seconds at a time and then come back. the only thing i changed over the winter besides a full rebuild was the carb I'm using a eddy 1407 750cfm carb. the carb is sitting on top of the manifold with no spacer plate. i had removed the PCV valve and stock plate that came on the car cause i was told i didn't need it. every vacuum port on the carb is plugged with those little rubber condom looking things. my vacuum advance on the dizzy gets vacuum from the port on the intake manifold.
all my plugs and wires are new and are firing. my firing order is 100% correct and i set all the valve lash the same when i built the motor on the stand. I've performed a compression test and they are all in the 140-147 range.
mods to the motor
D0VE block and heads
- eddy 750 carb
- eddy performer intake
- summit racing 3500 cam 282/292 486/512
- summit racing lifters
- comp cams push rods
- mild ported heads intake bowl blend and exhaust thermal hump removed
- stock ex manifold 2.25 dual exhaust with flowmaster hush power mufflers, H pipe.
- MSD 6al2 box
- MSD coil
- stock dizzy with pretronix electric conversion.
Can someone help me out? is my carb set up without the PCV valve causing this? wrong valve lash doing something weird?
thanks is advance.