New injectors no start.

lzam6285 · Aug 26, 2013

So I finished installing new headgaskets, injectors and studs. Truck was running when I started this job. Now it won't start. I know it takes a while but I've been at this for hours. You know how the story goes. I'm not seeing any injector pressure on my sct live wire. Is this normal since there is air in the system? Where should I go from here?

Thanks in advance.

ghohouston · Aug 26, 2013

Not meant as an insult, but have you checked your oil level? And I would double check all connections etc...

lzam6285 · Aug 26, 2013

No problem. Yes. I just put new oil in after the install and filled through the filter housing. I thought that was supposed to aid in helpin it start quicker.

Irontx · Aug 26, 2013

Shouldn't take more than 4-6 good 20-30 second cranks.... Should start ramping....building more and more faster with each long crank.... If your still seeing nothing.... Or its hanging at a certain pressure...... You have a leak....

04stroker · Aug 26, 2013

what injectors did you install?

lzam6285 · Aug 26, 2013

Sorry I was out front messing with it. I've been cranking this thing for hours, multiple battery chargings. I guess I'm going to have to open it back up. I used Full Force 155s. I don't in any way think its the injectors. It's probably something I did for sure. Injector pressure 0 duty cycle .84 steady. I don't know if that helps jus thought I'd but that in.

ghohouston · Aug 26, 2013

Did you unplug your ipr at some point? Are you building low pressure oil on the dash gauge?

04stroker · Aug 26, 2013

lzam6285 said:
Sorry I was out front messing with it. I've been cranking this thing for hours, multiple battery chargings. I guess I'm going to have to open it back up. I used Full Force 155s. I don't in any way think its the injectors. It's probably something I did for sure. Injector pressure 0 duty cycle .84 steady. I don't know if that helps jus thought I'd but that in.

The only reason i asked about injectors is I have seen a couple remanufactured injectors lately leaking oil from the top spool valve O ring not full forces just some random big reman companys. I would put together a tool to air pressure test your HPO system. Not hard you can get everything you need from a hardware store.

lzam6285 · Aug 26, 2013

Yes low pressure in the dash. Yes I did unplug the IPR and removed it to put in the updated screen. I just need time to dig back into it. It's an 03 and the IPR is on the back of the engine. You can get to it but its tight.

willholl79 · Aug 26, 2013

Make sure the crank sensor is plugged in tight(the one on the pass. side bottom behind AC compressor). Don't ask me how I know.

lzam6285 · Aug 26, 2013

I'll check that tonight. Thanks. I didn't mess with that but you never know. I think it some thing electrical. But what do I know. My STC says I have 0 high pressure any thing is possible but that would have to be a major leak. It has new stand pipes, IPR screen oil cooler screen, oil rail o rings. It had good pressure before I took it apart. ?????

Mattmann · Aug 26, 2013

Subbed.... Doing injectors hopefully soon

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loboost · Aug 26, 2013

Are the oil rails seated properly?

Is the engine turning over freely?

Did you torque the oil rails, stand pipes, dummy plugs?

Are the batteries fully charged? Ive seen some truck not want to crank because it couldn't turn over fast enough to ever build pressure.

ghohouston · Aug 26, 2013

Very good point about batteries being fully charged. These trucks will take a good amount of cranking to get going after what you have done. You did pull your fuel filter and let the bowl fill before you tried starting it right?