I installed new injectors from Casserly at full force on friday (250cc), and have not been able to start the truck since then. Also installed new tuning from Tyrant.

The truck will crank but will not start.

Could it be the IPR? We are thinking that if it is old and stuck open, there is not enough pressure being built up to push fuel.

Could it be the PCM? The keys were out of sight and the batteries were disconnected when we swapped chips. So I have no idea how the pcm could be affected. We even threw the DP tuner back in to see if it would start and had no luck.

We tried unplugging the ICP and it still wouldn't start.

Also, could having the long lead injector not on the 8th cyl make this happen?

There is oil in the rails, as I disconnected the HPx and oil started leaking. I believe there is fuel going to the injectors as well because the gauge on the my regulator is showing a steady 65psi while cranking

Your input would be greatly appreciated. I have an s468 with an EFR wheel to be installed as soon as I know that the injectors are all up to snuff. We would like to hit it hard tomorrow morning with a game plan.

 

Have you checked your oil level? If it gets to low that can cause a no start. Getting the wait to start light? I'm sure you have double checked all your wiring that you unplugged. Also check your battery voltage while cranking? It should be 10vdc or greater. Might be a good idea to get your batteries tested or at least throw them on a charger separately. I would also check all your fuses. Any smoke while cranking? Just throwing out some ideas...good luck..

 

No smoke out of the tail pipe while cranking, but there is blowby. Dipstick is bent to hell (oops) as it has been for awhile, added a gallon of oil and still no help. It was starting and running immediately before installation.

Have tried with 2 different sets of batteries, one set that are known to be good to start a 7.3 and the other set that are mine. Double and triple checked electrical connections.

Attempting to start without the chip in as I believe there might be an issue with my chip. When its plugged into my PCM, any time I switch to my hi-idle it triggers a SES light which goes off as soon as i switch it to another tune. I understand that when it starts on just the PCM with the single shots in it will run like ****, but I want to make sure that it is starting before putting the chip into it.

 

Give me a call on my cell and I will see if we can walk through a few things. If you don't have it you can PM me. Do you have access to AE?

 

thanks a lot clay....I will definitely be giving you a call tomorrow morning.

 

What did you disconnect when you cycled the motor to evacuate the cylinders(CPS, IDM relay, 42 pin connector, etc.) or did you suck out the fuel/oil. Do you have a diagnostic tool to see ICP and IPR while cranking? I have forgotten that I had the CPS unplugged before, which no RPM signal means no fire.

 

left the main connector above the driverside valve cover disconnected, as well as not having the valve cover gaskets even on the truck at the time.

 

You may have oil in the heads, but but you also have air in there too. You need to keep cranking it and maybe crack the oil gallery plug to "burp" it. Have you disconnected the ICP sensor and cranked it? Having a no start after injectors is pretty common. Most times it is fixed when the air gets purged. You have to make sure everything else is plugged in though.

 

Yes I have disconnected the ICP sensor and cranked it. Ive been cranking it almost non stop since friday night when we finished installing it. Spent from 9 till 4 on it yesterday, pulling vc's again, pulled gp's again, bumped the starter again, connected it all back up, cranked it some more. I've pulled the HPX and there is plenty of oil in there. I would have thought by now that all the air is purged.

 

The air won't urge until the injectors start firing. If the ICP doesn't climb above 500 psi the IDM won't fire the injectors. Have you cranked it with the VC's off and watched the oil spouts? If they are not pumping oil, you are not getting the air purged out.

It still can be PCM related, my guess is still air in the system. Air compresses unlike fluid. A simple pocket in the oil rails and you will not get a start.

 

we did start it with vc's off....no oil out of the spouts....so whats the best way to go about purging the air? crank, then losen the hpx right after...wait...then tighten it up and crank again? trying to figure out the easiest thing to do. Guess if the injectors arent firing I need to figure out why they arent. I've already pulled the ICP sensor and tried to start it that way, so does that rule out the PCM not seeing 500psi?

 

Did you remove the little plugs to drain the oil out of the rails before you pulled the injectors and maybe forget to put one of them back in? That will cause a no start.

 

been there!

 

So did you get your pcm contacts tinned? Didn't look so great in the other thread: https://www.ford-trucks.com/forums/1...ook-right.html

Are you getting the wait to start light?

 

I am getting the wait to start light. We decided to just try to get it to start without the chip in for the time being to rule out the chip being the issue. I know it's going to run like **** due to the fact that it will be single shots running on split shot tuning, but at this point any running is better than nothing. Once I get it running again I will deal with getting the contacts re-tinned.

I believe that the contacts being worn down simply means that a chip wont work normally, not that the PCM would be fried?