i have done every thing i can think of new parts ecm,distribtor,cap,roter and wires cam sensor all the grounds aer tight map sensor coil the ecm is showing no codes it acts like it waqnts to start but then it pops and some times will blow the hose for the pcv valve off i am lost pls let me know what else i can do

 

welcome to the forum. Check timing belt and timing, check compression.

 

i check the timing when i put it on tdc the cam spockets line up perfect and i pulled the dist cap and it is right on the number 1 plug so that seems to be right i have replaced every sensor on the car its getting fire i pulled the injecters and they are working i got 38 pounds of fuel pressure i am lost

 

only 2 items I can think of is the main relay, and the ecu. Where is your #1 cylinder located on your prelude? If you have air, fuel, spark and all are in the correct cylinder at the correct time, it should fire off. What is your compression in your 4 cylinders.