I just bought a 1997 Nissan pathfinder that has problems starting in the morning. My mechanic thought the problem was due to fuel flooding the engine, even though I did not touch the accelerator. He showed me a trick how to solve the problem by removing the fuse that feeds fuel into the engine, cranking the engine until it removes the excess fuel from the cylinder, then replacing the fuse and trying to start the car again that I have found works ok though the procedure sometimes has to be retried several times before the engine wants to start. Yeterday I had the mechanic check the car again and he found the spark plugs needed to be adjusted which he did as we both thought was probably the cause of the flooding. But this morning I got the same problem again. Another thing is the mechanic did an oil change putting in 25-50 oil instead of the 5-30 specified in the manual. I thought this could be the cause of the starting problem? But when I asked the mechanic about this he said using heavier oil ie 25-50 rather than 5-30 was standard procedure for old cars like this one, which seems to make sense to me but maybe is just a fairytale? Fortunately once the car does start in the morning it seems to have no problem starting again throughout the day. But sure would like any advice about how to fix this problem.