Dagnabbit!!

This page explains how to get to the ECU to check the OBD, but instead of two screws,

http://cellar.org/2010/ecucover.jpg

there appear to be two plastic rivets... no phillips slots in them like the picture suggests and they can't be pried loose after five minutes of trying.

http://cellar.org/2010/rivets.jpg

That doesn't seem right. They use the OBD for state inspection, for god's sake, disassembly isn't practical. You shouldn't have to go to the ECU, there should be a connector easily available to mechanic and inspectors???

Yah there's a connector, but I don't have the tool to read it. This is the back door method for people who don't have the OBD tool.

Oh OK, They don't give you a way to read the codes without a code reader? Pep boys should read the codes out for free, or so I'm told.

Take it to a shop with the proper diagnostic equipment, and let them figger it out it will cost less in the long run. I am a trained mechanic and I know this from experience.

Oh, you're no fun. :lol:

I'll go along with this. Temperature changes are a drag on car start ups. I put a half bottle of heet in my tank about every 3rd fillup during the winter months.

If it does it again... a half gallon of gas over the seats and a stick match will work very well.

No no, It's check insurance policy, a half gallon of gas over the seats, and a stick match. ;)
He said it wasn't cold enough to freeze but still could be water.

Nissan has all the codes the same way. They are a series of short/long flashes with each representing a number - then you can look up the code.
I'd still take a look at the cap - it only takes about 5-10 minutes.

How does Nissan activate the flashing?

Correction - looks like it's an OBD-2, my bad.

Thats looks just like my old car Tony, it is right behind there and there is a slot for a phillips head screwdriver to start the OBD computer. I don't recall it being a difficult thing to access.

Oh wait - are those the plastic push screws holding that panel in? I still have a few of them - never could get them back in.

Maybe the previous owner had trouble getting them back in too, and glued them in.

Two types, one with a center pin that can be pulled with pliers so the button can be pried out, and the second kind that gets destroyed taking them out. Fortunately they are cheap(less than a buck), and most auto parts stores have a selection.

fuel pump? filter? carburetor?

ah I dunno

Did you check your 710 cap?