I have a 02 SE 6sp which I purchased used 2 months ago. Since then I had both o2 sensors and a variable valve timing solenoid replaced. Everything runs fine except when I go a short distance, driving around 20 minutes, stopping for around 1/2 hour the car sputters and dies when I restart it. As far as I know the spark plugs are original with 115K miles on it. I plan on replacing them soon. Is there anything else I should look at in the mean time?

Thanks