2001 Toyota Celica engine starts rough

I'd check your fuel pressure. You may have a bad regulator or it's bleeding down overnight. Also, how old is the fuel filter?

Is the pressure regulator; fuel pump; fuel filter all located in the tank and can you get to it under the back seats? Why did the fuel not bleed back when the old injectors were still installed? The fuel will bleed back and the car will start hard after I wait no more than 20 minutes and that seems fast. I also can not find a connection to hook up and test fuel pressure how is it done on a Toyota? Thanks again Sam

Sam, let's go back to the basics here. When was your last spark plug change? In re-reading your first post, I'm thinking ignition. If it were fuel you'd have more symptoms for poor driveability.

I changed the spark plugs before I changed the injectors because the car was running rough. I though a tune up would help. Before I started my car today I turned the ignition on and off 4 or 5 times to see if it would prime pressure to the fuel injector rail and it worked and the car started right up after two cranks. So does that mean the fuel pump is bad or fuel pressure regulator?

Thanks,
Sam

SAM, if the fuel pump was bad, you'd have problems with accelleration and cruising down the road, BUT, if the pressure regulator was bad, it cuold be slow to build pressure to the fuel rail. Hence, more cranking. If you'll give me your email address, I'll send you some PDF files on diagrams for your fuel system.

[email protected]

Do you know if there is access under the rear seats or would I have to drop the fuel tank to do this repair?

thanks in advance for the diagrams.

Diagrams sent