Did it do this before the ignition tuneup? Did you retime the ignition properly?
Is the idle stable? Sounds like vacuum leak -- improper fuel mixture.
I have an 85 Gti 8v. It starts up and runs fine and revs all the way threw in neutral fine. But when driving down ye road once you get to 3200 rpms it's starts to studer and hesitate. Like its skipping in a cylinder. It has brand new distributor, distributor cap, button, battery, plugs, and wires. I'm a little baffled. Any body have any ideas?
Yes it did it before the tune up. It started out doing it every once in a while then got worse and died. Replaced all the ignition parts in hopes it was them. It starts fine, idles fine, and revs fine in neutral. Only doing it when actually driving and moving. As for the fuel filter I don't believe it's original but I'll check. It's timed right but I'll also double check that. Also will check all the vacuum hoses cause that sounds plausible also.