I own a 1995 150 Ford Van, 5.8 L engine. it stalls out like a vapor lock intermittantly. the first time it happened was when the weather was in the 90's and very hot and in heavy traffic. Since then it is not so particular, sometimes it is 70 degrees It will pick back up for a short time, then slowly die. If you set for 30-45 minutes it will start again. I have changed the oxygen sensor, thermostat, rotor button, distributor cap, spark plugs and wires. It does not register hot. The last time we had it out, we had been on the road for maybe 2 hours, no stress on the van, not pulling anything, in the 70's, after 2 hours it died, we waited 30 minutes, then it started, drove for 20 miles, did it again, this repeated it self 4 times in a 4 hour time span, needless to say, we will not be taking it out again untill we figure it out. We were told to sell it, but this does not fix the problem, our local garage, gave up on it after two trips in. Has this happened to anyone else? And how did you fix it??????

hi 1994 cutlass supreme 3.1 V6 Engine I wanted to tune up my car and bought spark plugs but when I was putting them in, they didn't match up with the old ones. Plus, the factory gap was supposed to be .60 inches but it was more like .35 inches. I put them in anyway. It turns out the manual says the replacement plugs should be #AC Type R44LTSM6 but the store sold me AC Type R44LTS. No letter M6 after it. I test drove the car and it sounds good. What is goiing to happen in the long run? thanks bob