440 problems

Hey there guys !!!! Tryin to finish my 67 coronet 440 but having a few issues ......

1 when trying to set the timing the balancer is bouncing everywhere
2 i only have 4 psi of fuel pressure .....but it was at 6 psi
3 the car is reving up and down on its own ( between 900-1300 rpm

Any help would be awesome !!!!! Thanks

What distributor advance springs do you have?
They may be too weak to hold the mechanical advance steady at idle.

At idle it's ok ...even at 1500 rpm it's ok .....as Sinn as I go higher the spread is huge and I can't set it

I also took out the points distrib and put and electronic one in and have the same problem

And it backfires when holding it at about 3000 rpm

plugs/plug wires/firing order (esp 5/7) OK/correct?

What he said, or a vacuum leak

Leak would be my 1st guess as well.

fuel pres.bad pump,restriction in line(debris) or worn pump rod. pulsing rpm sounds like a vacume leak.make sure you have your plug wires indexed rite,its easy to get mixed up somtimes.

Hot wire jumper from battery positive to coil positive to ensure that you are getting consistent proper voltage to distributor. Be aware for those running points that you are bypassing ballast resistor so do not run this way for too long as will eventually cause point damage if you are running same.

If all is now well,,,then check all ignition wiring from ignition switch forward to determine if bad switch, wiring, connectors etc, is cause of the erratic idiocyncratic conditions you are experiencing.

Weak or irregular electrical input to coil can cause a wealth of mysterious consequences.

440 problems and the b.... ain't one!

I know, couldn't help myself.

R.

Dog you lost me, straighten me out!

Google "99 Problems Jay-Z" and you will be enlightened...

Will do. EDIT Moving picture (video) but no sound, other utube stuff plays OK