S4 Turbo II no injector pulse
07-31-12, 11:43 PM
#30
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).
08-01-12, 06:41 AM
#31
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.
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.
08-02-12, 05:09 PM
#33
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.
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.
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.
08-06-12, 07:48 PM
#36
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
Thank you
08-21-12, 03:42 PM
#38
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
08-21-12, 04:13 PM
#39
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.
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.
08-21-12, 05:16 PM
#40
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.
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.
-Thank you
08-21-12, 05:19 PM
#41
-Thanks
08-21-12, 06:17 PM
#42
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 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.
Last edited by Banzai-Racing; 08-21-12 at 06:22 PM.
08-22-12, 07:51 AM
#43
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 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
08-22-12, 08:23 AM
#44
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.
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