Dd15 crank no start

[PROMOBILE]

(03-17-2026 )Rawze Wrote:  As far as the no-start goes... did someone pump the fuel primer by hand about 20-30 times after the fuel filter change?.

What does the oil pressure and fuel pressure show (in troubleshooting software) while connected to the ecm and it cranking?.

I.E.>
On red engines, if the fuel pressure while cranking is below 50-psi... engine will not even open injectors to fire a cylinder.

The oil pressure while cranking is reading 60psi

The fuel pressure on the high side is 275-305

The fuel pressure on the low side is reading 0 on the ecm but with a manual guage it reads about 65-75 psi

we put a new engine harness and replaced ecm after pinning out the old one and find it was faulty. Low pressure sensor was tested on anothe truck we have here and works fine.