First a little background. The van has 261,000 miles on it and had the original fuel pump. I drove 65 miles to work running great until I got there when I noticed an erratic idle, like hard missing, especially when in gear. On the way home, The idle seemed to smooth out at stops and it ran strong on the freeway until about 30 miles from home when it suddenly cut out, then abruptly took off again, cut out, ran again three times until it finally died. Tried several times to restart and each time it would fire, idle at 400 RPM for a few seconds then die. Towed it home and tried starting the next day and it ran long enough to move it in a better spot and then it quit for the last time.
Today I installed a new pump module that I have had for years and it started no problem, drove it out of the driveway, got on it in first gear and it backfired a couple times. Turned around in the street drove back home and it backfired again. There's no CEL and I key dance checked for codes anyway and couldn't get any. After checking for codes I started it, put it in gear and and got on the gas and it backfired and stalled. Started it again and it pulled strong. Not sure I want to get too far from home until I get it figured out. When it was running erratically at work I thought I was getting a strong exhaust smell. Where do I start? Did running erratically damage the cat?
Today I installed a new pump module that I have had for years and it started no problem, drove it out of the driveway, got on it in first gear and it backfired a couple times. Turned around in the street drove back home and it backfired again. There's no CEL and I key dance checked for codes anyway and couldn't get any. After checking for codes I started it, put it in gear and and got on the gas and it backfired and stalled. Started it again and it pulled strong. Not sure I want to get too far from home until I get it figured out. When it was running erratically at work I thought I was getting a strong exhaust smell. Where do I start? Did running erratically damage the cat?