I just bought a 97 gmc 1500 with vortec 305 and it idles high and when i put it into gear it tries to run away and it clunks when in gear i think its an intake gasket because i pulled my pcv and there was high vacum pressure under the valve cover? can anyone point me in the right direction.

SOURCE: 1996 Chev. 1500 pickup truck, 305 C.I. PO300 code

Than you problem solved by yourself already,

Dear you had done good job for your dream,

just some modification nedds like,

CHECK YOU ENGINE MOUNTINGS,OR THIGHTEN IT,
YOU HAVE TO ALSO CHECK YOUR PLACEMENTS ORDERS OF YOUR ENGINE THAT NOT TO BE CHENGED AFTER YOUT TRY.

THNX

pat murray

• 293 Answers
• Posted on Oct 17, 2008

SOURCE: 1998 GMC Jimmy Vortec V6 4.3L 4WD

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800bfc68
hope this helps

SOURCE: Where is the pcv valve?

SO I WENT TO THE DEALER WITH THAT SAME QUESTION AND AFTER RUNNING THE VIN # IT TURNS OUT THAT IT DOESN'T HAVE A PCV VALVE, WHAT HAPPENS IS THAT THE VALVE COVER HAS SOME TYPE OF MESH AND AFTER IT GOES BAD YOURE SUPPOSED TO CHANGE THE COVER ITSELF TO AVOID GETTIN OIL INTO YOUR INTAKE. OTHER THAN THAT IT SHOULD STILL BE GOOD.WHAT I DID IS LOOK FOR A PCV VALVE THAT FITS INTO THE HOLE AND REPLACE THE HOSE SO I WOULN'T HAVE TO BUY THE COVER

SOURCE: 1997 gmc sierra 1500 5.7 vortec got spark got fuel

You said you have fuel pressure but what is it? It has to be 55 psi or it won't even try.

SOURCE: Can a 1995 4.3l vortec v6 from a chevy astrovan

yes i imagine so. they are the same block but with different intakes.