Hi, I have a 1989 2WD cargo van. It runs great. But, it has developed a consistent starting problem. If it sits on the driveway for 2 to 3 days, it does not start. Cranks fine and will always start immediately if I give it a 1 sec shot of starter fluid in the air intake hose that bolts to the air cleaner body. From then on, it will run normally and restart just fine until I let it sit for a few days again.

Obviously I suspect something in the fuel delivery. I don't know anything about fuel injection, but I assume there's a system for cold starts and I'm guessing it may be the culprit. What are the diagnostic tests?

Thanks in advance for any help.

PS: I have a second question. I don't drive this van in the rain because it has so little weight in the rear and the rear wheels can just spin when the pavement is even a little wet. I haven't figured out a way to get some weight over the rear wheels that won't slide all over. Anyone have a good solution? Also, any recommendations for tires that might mitigate the problem?