Is this a Carb or EFI system also the type of Ignition system

Try this remove the PCV valve-the rpm should drop atleast 50rpm when plugged and raises when unplugged. No changes inspect valve and vacuum passages.

Also perform a fuel pressure test.

Double check all connections at plug wires at spark plug and distributor to include the coil wire from coil to dist. cap.

Does it have a mechanical vacuum advance?

Spark plugs is it the correct type and heat range.

HTH Good Luck!

Answered by rasmataz
68 questions asked

It is a Carby system.

Tried removing PCV tube and RPM did increase when tube was removed.

Tested fuel pressure - seeing its gravity fed, I pumped some compressed air down the line backwards to possibly blow out any gunk. Didn't seem to make much difference and pressure still seems good.

When I was checking coil, leads, etc, I noticed the condensor was loose (and therefore not grounding properly). Once I corrected this - it is now working 100%! Could this indeed cause the problem I was having, or did I perhaps knock something else while I was hunting around?

Response from zhimmyd
1 question asked

Yes it will-the condenser absorbs energy ( voltage) to help the coil to build the magnetic field to induce the secondary surge on the secondary windings to fire the plugs. and also provides noise suppression.

Also on a Contact Points ignition system it helps prevent the points from burning up due to arcing.

Answered by rasmataz
68 questions asked

Much appreciate your help - thanks very much! You have helped solve a 2 month niggly problem :)

Response from zhimmyd
1 question asked

Strike another one up for the good guys :D

Answered by Service Writer (expert)
9,955 answers provided