saltydog

resently when my car has been running for a little while and i am coasting down a road the reving up and down about 400 rpms up and down. also the oil pressure has slowly decreased since i started driveing. i was told it might be a vaccum leak. does anyone know anything about this?

69gto96z

Mine T/A is doing the same thing. I will let you know if I find out anything.

saltydog

thanks, comepletly lost any help whould be great!

ky1967stang

if it "revs" while driving your timing chain may be stretched out.

saltydog

while it does it when im coasting at low speeds not applying any gas. when i give it a little gas it stops but starts back up if i take my foot off the gas and it slows to the orignal speed it happens at. also if the timing chain is the problem why does it do it when the engine heats up