loaned my brother my 98 V70AWD and he failed to tighten gas ...

Let's see if we can get this figured out. But first, the gas cap being off the tank or loose would only cause an alert of the evaporative emmissions system. These types of problems don't stop an engine from running.

So let's see if we can get it to run when you spray some carburetor cleaner (or other similar flammable spray) into the throttle body. If it cranks and runs for a couple seconds, then there is a problem in the fuel system.

If the spray doesn't make it run, then put on a glove, and pull a spark plug wire loose, and hold it about 1/2 inch away from the spark plug. Does it have spark?

Let me know what you find.

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Thank you for your response. When I looked for a way to troubleshoot on Sunday afternoon and foundthis site which indicated that 4 experts were available to answer questions, I entered my challenge.
Now, two days later, after the car was flat-bedded to a dealership, your response is useless...as it would have been without any tools, experience and 10 miles from the closest town.

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