my problem is if the truck is cold it starts immediately. If it is hot it will turn 10 or 15 times before it starts. I have replaced injectors, crank sensor, fuel pump, knock sensors, mass airflow , o2 sensor. It all started when i replaced the injectors. It also is showing po- 174. Cannot figure it out. thanks

 

install a fuel pressure gauge and check for fuel pressure leakdown.

 

no fuel pressure loss new fuel pump

 

how long did you monitor presssure after shutdown?

 

with gauges it did not drop within 24 hrs

 

24 frs

 

typically a long crank after a hot soak is from fuel leakdown causing a flooding conditions. but yr not seeing that.

p0174 is fuel trim to lean. is this code from b4 the repairs or is it active now? if actvie now; engine at operating temp; check the fuel trim with your scan tool and idle and held at 2500 rpm. report for both bandk1 and bank 2.