OK.IM GETTING A READING FROM THE ECU AND ITS BLINKING FROM THE LED LIGHT.IT BLINKS 4 THEN WAITS A FEW SECONDS LIKE MAYBE 3 SECONDS OR SO AND THEN IT BLIBKS 19...AFTER THAT IT GOES BACK TO BLINKING THE SAME CODE OVER AND OVER.ITS NOT THE ORIGINAL ENGINE ITS I THINK THE D15Z1???PLEASE IF U HAVE ANY INFO PLEASE GET TO ME ASAP THIS W WOULD REALLY HELP...ALSO THE CAR TRIED TO START AND IT FIRES UP GETTING SPARK AND FUEL BUT IT SOUNDS LIKE ITS ABOUT TO START BUT ITS NOT QUITE THERE...PLEASE GET TO ME ASAP!!!

 

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Honestly..

so you think it's a code 19?
Is the car obd0 or 1?

Use the FAQs and it'll explain what is wrong and how to fix it.