I'm at my wits end with this thing I'm probably just going to have a shop look at it, because if I keep working on it and having the same issue, I'll get angry and sell it.
So, 280z, stock l28e... A few months ago I'd been having an issue with it bucking, going on and off power and clunking along, and having the idle go crazy, between 500 and 2000 and back and forth again. The engine lacked power, and when I took my foot off the gas, about three seconds later the car would sort of clunk, and I'd occasionally smell gas.
I replaced every vacuum tube (a few were broken) in the engine compartment and a bunch of fuel lines on the rail, replaced the clamps... I had an issue with difficult starting that I rectified by finding another vacuum tube which was broken, and replacing that.
...so the car ran PERFECTLY for about a month, and now... I'm back to all the same problems as before, including the gas smell. I've checked all the fuel lines, re-checked all the vacuum lines, and I just feel really futile right now...
...My significant other and I just bought a nice z31, but until my car is sorted out, I'm in no mood to brag about it/post pics.
Any ideas as to what this could possibly be? Bad ignition? Bad vacuum advance? Bad fuel pump/pressure regulator? Or, its off to try either Shinzo or Mike's z Shop. It just kills me that while I can find no difference in the engine bay between now and last week, when it was perfect, I have the exact same problem as previously.