I have '88 and '93 Toyota extra cab pick ups. Both are 3.0 liter V6. I have 407,000 miles on my '88 and it still runs strong. I use it everyday. My '93 has 248,000 and stalled on me coming home the other day. now I can't get it started. I have spark all the way to the plugs. I have fuel getting to the cylinders. It turns over just fine but it will not fire up. I've checked all the plugs. I replaced the cap and rotor. Battery is good. Anyone have an idea of what I should check or what might be the problem?