Trouble starting...help!

[RideFX]

I just purchaced a 92 240sx over the weekend. It has 130,000 kms on it, so as you can imagine its in good shape. I dont have any history as to the maitenence that has been preformed on the car previously. The problam is that the car will usually fire right up, like in the morning, however if the car has been sitting in the sun for a few hours (with out being driven) it will turn for about 3-4 secs before it starts up. If the car has been just driven though it will turn on fine. Also after the car has been driven it idles around 500-700 which seems a little low. any sugestions? (i have done a search already)

Any help is greatly appreciated!!!!

Ride

[240fan]

I think its Injector related, what may be happening is one of them has a bad bottom O ring and it loses fuel pressure so it has to crank a lot to build that up and push the raw fuel out. I had low Rpms and rebuilt injectors from autopartsgiant took care of the low rpm problem but I still have the cranking problem.