Correct. Rotorsports transferred its map to my power fc and started the car.

 

Are you certain you have don't have the primary injector wiring wired to the secondary wiring and vis versa? A simple continuity test would validate that this aspect of the wiring is correct or not.

 

I will check again. Im not sure how this mistake couldve been made being that prior to installing the adapter harness and PFC the car ran. I'll go check the wiring from the factory harness through the adapter to the power fc.

 

Let's go all the way back to basics:

Did you modify the trailiing coil? Did you verify that both trailing coils are firing correctly?

What is the boost reading o the commander with the ignition on?

 

The trailing coils should be fine. I trust your work. I will verify trailing spark just in case of course, I did verify leading spark though. I'll check the boost reading in the afternoon while I take a look at the wiring as stated earlier (it started raining).

 

Ok so we did the trailing coil for you.

I am starting to think that there is no problem with the injectors getting power. The fact that you hear the injectors with the spare CAS, yet the car does not start while push starting is pointing back to the original questions being asked. Check your fuel pressure. When you were installing the new engine harness did you disconnect the fuel lines? Have you verified that you do not have the supply and return mixed up.

The PFC is supplying the ground to the injectors, if they were not getting power while cranking, there would be no injector duty reading.

 

have u tried removing the power fc and trying to start it?

 

I verified fuel pressure before, and I am sure the lines are installed properly. Feed from fuel filter into primary rail, primary rail to secondary rail, and secondary rail to return. I will check fuel pressure again tonight just in case though. It can't hurt since I'm going to remove the upper manifold anyway while I'm rechecking the grounds. Is there anything in the charging harness that would impede power reaching the injectors properly during start up other than the main relay? Also I was under the impression that the duty cycle reading on the commander was just a calculation according to target spray volume and injector size.

Thanks for your help. Hopefully I can get the car started soon.

Removing the Power FC would require me to remove the adapter harness and I'd have to buy another factory trailing coil. So no I have not.

 

bump

 

Can't help you if you do not answer the questions being asked.

 

Sorry, I've been preparing for a trip and checking the boost reading with the key on slipped my mind. I did however check the fuel lines and pressure, everything is okay there. I will check the boost reading tomorrow morning and post before I head out of town.

Thank you

 

If you checked your fuel pressure, what is it?

Pull your plugs are they wet or dry?

 

I'm back from my vacation now. I ended up not having time to post this before my (very) early flight to Seattle. Here's the information that you needed from me:

Boost Reading - 40/42 mmHg before cranking and while cranking it reads 58/60 mmHg

Fuel Pressure - 45 psi when priming and 42.5 psi while cranking

Plugs - Dry

Also, I'm not sure whether or not this would help but my injector duty cycle reads 10/11% under initial cranking and as the engine turns for a while it goes down to 2/2.4%

My cranking speed is 238 rpm.

-Thanks

 

You do know that your primary rail is the short one right? Not trying to be smart, this a common mistake on this forum.

Pull the hose off the primary rail (short) and prime the car into a gas container, verify flow.

It really sounds like you have your feed and supply mixed up. Does the diaphragm on the primary rail have vacuum nipple? There are j-spec rails with reverse flow.

 

I know that my primary rail is the one closest to the engine. No offense taken, I appreciate being thorough. I'm 99% positive that the feed and return lines are properly installed but since I'm not looking at it right now I will not claim 100% correct installation. I did prime the feed line into a small container intitially before connecting my fuel pressure tester (just to make sure before wasting time). The rails are usdm flowing from right to left on the primary and left to right on the secondary (looking from the driver side). Also I'm not positive on the presence of a vacuum nipple, the only feature that stood out to me was the banjo bolt mod done during the rebuild (I guess).

-Thank you

 

I shouldn't be my injectors, the engine wouldn't start with the factory injectors and I replaced them with new aftermarket ones just to make sure. I've also checked them by rotating the CAS at this point and they all make noise. The factory ones click when 12v and ground is applied to the as well.

-Thanks

 

I am out of ideas without seeing the car. Everything reading from the commander is fine. The PFC is grounding the injectors to open them.

I guess you could try installing jumpers in the connector to the resistor pack to bypass it temporarily and see if the issue is there, but the fact that the spare CAS is firing them, means the resistor pack should not be the issue and the PFC is getting the signal. The only thing I can possibly think of is fuel routing.

I am sure it is something simple, but again not being able to see the car makes it more of a guessing game.

Edit: switch the fuel line just for kicks to rule that out. It can't hurt anything.

 

I most likely is something very simple, but what is beyond me at this point. I wish I were closer to your shop. I really appreciate your help. I'll switch the fuel lines tomorrow afternoon. If I cannot get the car to start by this weekend then I will arrange it to be transported to you for this issue and a few maintenance things. What's your turn around time looking like normally? Message me please.

-Thank you

 

I am sure it is something that could be sorted out in a few hours. We always have 8-10 cars in the shop for rebuilds, but things like this I just fix and then go back to the larger projects. In other words we would be able turn it around quickly.

 

Alright sounds good, I'll give Elaine a call and setup a plan and transport next week If I don't get it started. Thanks again.