Help! Hey guys, brand new to the forum. So I’ve had this truck since July and it’s been in my shop more than it’s been on the road. 3 days after buying it, I had to rebuild the filter head because it lost prime. Oh, and this is my first dmax. It Ran for a month then hard starting when hot. Tore it down, had 6 factory injectors and 2 bosch remans. After testing, I had one bad factory. Debated replacing factories but at this point had learned too much about the lb7 and decided I wanted to go with the LBZ. I planned on selling the truck after I got it put back together. Put it back together and BAM! It ran for 4 days, and then nothing. Checked rail pressure when cranking and only had 900 psi. I was fed up at this point and decided to throw parts. Just wasn’t feeling up to trying to find fittings for the return ports in the heads and check return rates. Plus was banking on injectors not being the issue since they only ran 4 days. Threw a cp3 at it and fired first try. Now here I am a week later (after running perfectly) with hard or no start when hot. I just wanted to get rid of this thing. I am almost positive it’s another injector but I haven’t worked myself up to checking the return rates. I am a little weary of bending the steel return lines back away from the head to get the fittings in. So if anyone has any advice on what direction to go, I would greatly appreciate it. Also, can the high pressure relief valve in the block assembly be intermittent or is it just go or no go? Thanks Gents
Last edited:
