Ok, Angela is clearly unhappy about something, and we're trying to troubleshoot. The symptom is a vibration, and lack of power. Seems to be in the 2100 to 2400 rpm range where it's at its worst. At first cruising at a steady speed was fine, but accelerating (like from a stop sign) seemed to bring out a definite miss. Now I'm experiencing what is best described as "rough running" even when cruising. Here's what we've done so far:
1. I put some Seafoam in the gas tank, and I've burned about 2 1/2 gallons of the treated gas so far. I did this because I first noticed the problem after filling up, and I thought either I got some bad gas (non-ethanol premium), OR I ran the tank down too low.
2. We pulled the plugs and cleaned and regapped them. They were pretty sooty and the gap was too large. All looked even, though. I'm planning to order new plugs.
3. There was tape on the vacuum line and we replaced that--it actually came off a couple of months ago. Planning to get a new line.
This netted a little smoother idle, and a little better cruise (tested around the block), but there's still something not right. What should I check next? What should I replace? Should I get new plug wires when I get the plugs? And how can I rule out fuel vs. electrical?
Sorry if this is elementary to all of you--I'm trying to learn how to service the basics on this car, and hubby is teaching me. He didn't want to have to maintain another classic (we also have a '64 Porsche 356 SC), and I don't feel like running 60 miles to the local classic British car guru for every hiccup. So, I need serious (hopefully friendly) answers!