1991 240sx hard to start...sometimes??

[amolao]

ok, this the scenario:

The car starts fine in the morning, I park the car and If I start the car every couple of hours after that, the car starts fine....But if I wait until 4:00 PM or let the car sit for more than 3 or 4 hours, the car is hard to start.

SO basically only in the morning (first start of the day) and there on (if I was to start the car every hour or so) the car starts perfect. I replaced the spark plugs, fuel filter, coolant temp sensor, clean the TB, and clean injector connectors.

I'm at a loss here...maybe a bad EGR or leaky injector??? Can the temperature (the time the car sits) be the solving key to this mistery???

[MaximA32]

An extended crank condition is usually caused by a weak fuel pump. It's a problem not specific to Nissans but it does seem to happen with great frequency in Nissan/Infiniti products.