Factory Service Manual not helping!!

[spartan40]

Hello I am having trouble trying to get my 90 240sx to run. I have checked the ecu and it keeps telling me code 55. I have checked wires, plugs, distributor, and the iac/acc. Nothing seems to be wrong with these. It ran fine for a while, then i let it sit over the weekend and now it will crank over but will not run. i was pumping the gas pedal to get it started, but that stopped working. Then i started using starter fluid and that worked for a while. Now all it will do is crank over. Most of the stuff the Factory Service Manual tells me to check says to start the car, but i cant. Can anyone tell me what i can try? I think it might be the CKP but i am not sure. I thought the ECU would tell me if the CKP was bad right? help please i need my car to get around. THANkS

[AZhitman]

Pumping the accelerator won't do anything, it's a fuel injected car.

Have you checked fuel pressure at the rail with the key in the ON position?

Might be time for a fuel pump.

[spartan40]

i disconnected the fuel line right before the fuel rail and it was squirting fluid out. And their is gas residue on the spark plugs.

[L_adan_C]

well you fouled out your plugs, try replacing them. Once you do, check if your getting spark...

[spartan40]

well i changed spark plugs and checked for spark. The only time it seems like it wants to crank is if i switch the 3 and 4 spark plugs. I even reset the timing today. Still just sits there and turns over.