95 grand cherokee 4.0 crankcase ventilation

[tjb6172]

The crankcase ventilation orifice is leaking where it goes into the manifold. Would this cause a bad vibration when it's in gear and setting still. I have change the plugs, plug wires, rotor cap and button, fuel pump, fuel filter, and it didn't fix it. I was checking to see if the fuel injectors were ticking (checked with a stethoscope and they were ticking). This is when I noticed the air leaking out of the crankcase ventilation orifice, does anybody know if this would cause the engine to vibrate. please let me know if anybody has had this problem or knows something else for me to try. I've tried everything that I can think of, any and all sudgestions wanted.

Thanks
Todd

[Dale Aeppli]

Originally Posted by tjb6172

The crankcase ventilation orifice is leaking where it goes into the manifold. Would this cause a bad vibration when it's in gear and setting still. I have change the plugs, plug wires, rotor cap and button, fuel pump, fuel filter, and it didn't fix it. I was checking to see if the fuel injectors were ticking (checked with a stethoscope and they were ticking). This is when I noticed the air leaking out of the crankcase ventilation orifice, does anybody know if this would cause the engine to vibrate. please let me know if anybody has had this problem or knows something else for me to try. I've tried everything that I can think of, any and all sudgestions wanted.

Thanks
Todd

HI, THE LINE YOU'RE TALKING ABOUT PULLS THE GAS VAPOR AND OIL VAPORS IN TO THE INTAKE MANIFOLD TO REBURN THEM THIS LINE AND FITTINGS MUST BE CLEAN AND HAVE VACUUM AT ALL TIMES FOR EMISSIONS TO WORK. IF IT PLUGS UP OIL AND VAPORS WILL BE PUSHED INTO YOU AIR FILTER BOX, AND RUIN THE FILTER.THERE IS A VALVE WITH A VERY SMALL ORFICE OR OPENING IN IT,THE VALVE COMES OUT OF REAR GORMMENT THRU LINE AND IS PULLED BACK INTO INTAKE MANIFOLD AND BURNT. HOPE THIS HELPS DALE
[email protected]

[Caribbean ZJ]

Happened to me. i noticed oil running back on my air filter. Pulled the rear pcv valve & there was an old piece of torn off silicone from the the vave cover gasket clogged into the ventilation tube.cleaned it out, & have less vibration since. Alot of people ignore this part but it is important for smooth running. Im going to buy a new pcv valve