On my '78 Pace Car if I give it a work out and go through the gears (4 speed) when she gets up to about 3000 rpm in each gear the engine starts spurting and skipping and bogging down. I only put a little over 100 miles on her since I picked her up a couple months ago and she just turned 20K so I think she just sat a lot without being run.
Gas filter maybe? or what? My mind is pretty simple when it comes to the engine.

It could be the gas filter...the one at the carburetor or the gas sock over the pickup in the gas tank.  The gas itself could have turned into varnish from age.

Today it died on me. headed out and after a while it started the spurting and bucking. couldn't get it up over 25 mph and it would die and coast to a stop. It starts up after a little cranking and then the same thing. Got a ride home from a nice guy that stopped and went back with my trailer. I'll have to see what I can figure out or take it somewhere.
Jeffm2009-08-09 11:03:37

My first guess would be a fuel problem, most likely fuel pump.  It sounds like it runs out of fuel, and the problem is getting worse.  A check with a fuel pressure gauge would be a good idea.  And of course, a partially plugged filter would show the same symptoms.

Good Luck
Larry 

[QUOTE=VetteSpecialties]My first guess would be a fuel problem, most likely fuel pump.  It sounds like it runs out of fuel, and the problem is getting worse.  A check with a fuel pressure gauge would be a good idea.  And of course, a partially plugged filter would show the same symptoms.Good Luck, Larry  [/QUOTE]

_popupControl();  I just went through almost the identical issue. My engine kept bogging and every time I would try something different it would help for a few miles then it would do it again. I changed the plugs, plug wires, had the carb. adjusted, etc. Then about a week ago I went through the ATM to get money out and it started bogging real bad. I had been putting it in neutral all the way home and was only a few blocks away. As soon as I put it in gear and pulled through the ATM it died. I turned it over for a minute or two and it finally started. I pulled into my driveway and as soon as the idle dropped again it bogged then died. I finally got it started again the next day and heard a ticking much like a lift but faster. I went around the engine trying to find it and I finally did. It was the PCV valve that goes into the valve cover. I pulled out from the valve cover and it still ran bad but as soon as I pulled the valve from the vacuum hose the idle went right back up and it ran great. I went down to the parts store and picked up a new one for $1.99 I took in yesterday and my mechanic adjusted my timing, carb. etc but the main cause of the bogging was a plugged PCV valve. the problem is I changed it out last year as a routine thing and I am wondering why it plugged up so fast. It may be from like the post above mentions, not driving the Vette much. I only had it on the highway 2 times for longer road trips this year otherwise it has been mainly city driving except hopping on the highway as a short cut.

 

If your PCV is clogging that fast, it often comes from excessive blow by in the crankcase.  Blow by is usually caused by worn rings or insufficient ventilation.

Does sound like a fuel problem ,but...don't rule out a failed/failing ignition module, or coil. I would first check the fuel pressure, and go from there.
Also, check your oil...smell it...see if it has a strong gasoline smell. The fuel pump diaphragm could be ruptured, dumping raw fuel into the engine that should be going to the carb. On cars that sit for long periods of time like that, this is a real possibility...

don't forget the mech. adv. weights mite be stuck'