Cranks, wont fire
 

Drove it home from work Friday, was about 34 out and the roads were sloppy snowy slush. Washed it off in a hurry in the drive an parked it, was and has been running great other than SAI codes from a broken vac line that for now has been capped off. This morning I jumped in to head to work, cranked it to what seemed to be that 1 sec short of letting it fire, oops, so cranked it again, and again,,, no go. No odd noises, just cranks like it has no ignition to fire??? So far Ive tested the battery which checks out fine, and unplugged the MAF. Where to go next? Just a gut feeling, seems to electrical to me???

Maybe crank position sensor??

Listen at the fuel cap while someone turns the key to the "on" position, do not start it. You should hear a whirring noise coming from the fuel tank which is the fuel pump.
No noise, check the fuel pump relay first.

I've been messing around with a non starting Boxster and found the following.

Check for spark, , Jack up the right rear of the car and support car on a jackstand, chock the front tires and engage the parking brake or it may crush you like a bug. Remove right rear tire pull the #3 coil and plug. Double check the car is in neutral with the parking brake set. Ground the threads of plug on the valve cover and have a friend crank the car. You should see bright blue sparks.

Check for Fuel pressure. Jack the left rear of the car and remove the left rear tire. Don't get crushed. Look for a rubber hose running down the left side of the firewall above the plastic under car closeout panel. Disconnect the plastic quick disconnect by pushing the button on it and slowly pushiing it towards the front of the car and pulling it back towards you. Did you get squirted by about 6 onces of gasoline? If so, congratulations, your fuel pump works. Push the quick disconnect back in place to reconnect it. Give it a tug to make sure it snapped home. Oh yeah, it's best to do the gas part outside away from any smoking areas.

Pull off the connector to the throttle body that comes from the AOS. Spray some wd 40 into the opening in the throttle body and crank the motor at the same time. If it sputters, then there is something wrong in the fuel delivery. If no sputter, then there is something wrong witht the ignition.

Once you have figured out if it is fuel or spark, then you can start to troubleshoot the problem.

Get back witht the diagnosis.

I had a similar issue.

Does the tach move when you crank the car? If it does then the crankshaft position sensor should be okay.

Definitely check the fuel pressure. In my case, the fuel filter (inside the sending unit) clogged and fried the pump.

Also, what year is yours?

Thanks for all the replies, time to get busy.

BTW it is a 2002 2.7 Tip

Fuel pump relay
There is info out there
Use a jumper wire - should hear fuel pump kick on. If yes then try and start

Thanks all, fuel pump relay!!!