Re: wood a vaccuum leak cause engine to bog
I'm having this same problem with my 74 CJ5. Actually, it was running like a champ until I changed out the valve cover to eliminate an oil leak. Now it boggs down really bad, but sporadically.
So.. Aaron, I have a couple questions for you on this one.
First is that my Jeep has been totally stripped of all its emissions equipment. What I mean is that there's one line from vacuum advance to a hole on the carb and a line from the PCV to the intake manifold. That's it! I know there should be other lines coming in from the crankcase to a router, stuff like that, but it's all gone. How does this affect the timing of the vehicle and would this cause the engine to bogg down?
Second. Is it possible for there to be an excessive oil pressure problem? For instance, what if my valve cover was leaking because the engine was trying to push oil out of somewhere? I don't even know if this is possible, but it makes some sense in my case. The engine still leaks, just not at the valve cover anymore. (I'm still trying to figure out WHERE it's coming from). Anyway, point is, if the engine had too much pressure (is this possible?) and it was forcing oil out of the only place it could, the valve cover, and now that hole is plugged up, could it be screwing with some other part of the engine and causing this symptom?
This weekend I'm going to get some new vac. lines and I'm changing out all the ignition stuff just to make sure, new cap, rotor, points, coil, wires, plugs, etc. Then it's going to the shop if it still has a problem. I'm pretty sure this is all related to timing, but I've learned that it's not always what I think!!! I know the vehicle needs a tune up and the timing is way out whack anyway, runs real rich, occasional backfire, stuff like that.
TIA for replies guys.
Carl, Tampa, FL, 74 CJ-5
If a Jeep can't take you there, Think twice about going..