FI-TT with UpRev tune: cranks but no spark nor fuel?
 

Hey folks, I am running into a road-block with my install. Does anyone have an idea about this? thanks

I have a 2008 Infiniti G37S 6MT, which I am currently in the middle of installing a Fast Intentions https://fastintentions.com/ Twin Turbo kit for. The ECU tune was made by sebastian@specialtyz.com for this application using UpRev.

I have my own UpRev cable and license. After flashing Sebastian's tune into the ECU with UpRev's RomEditor, I can crank the motor, but it does not start. Below are the results of my diagnosis so far:

• My ECU ROM number is: <23710 - JK75D>.
  However, Sebastian gave me a tune for " JK78C", but assured me that JK78C is the updated ROM and this is what UpRev has been using for my ECU for a few years already.

• Checked all fuses - none blown

• Checked all wiring harnesses- all OK and connected

• The following were checked using both <Sebastian's JK78C tune>, as well as the 'OEM' <JK78C.OsirisROM>, which was downloaded with UpRev's RomEditor:
  • NO SPARK
    I physically checked this during cranking with an inline spark plug tester. However, there was 12V across two of the three terminals (the third terminal is ground, I assume) in the connector that goes into the coil pack - this would indicate that there is no physical wiring issue.
  • NO FUEL INJECTION
    I physically checked this by pointing an endoscope into an open spark plug hole, as well as putting a stethoscope onto a fuel injector to listen for clicks during cranking. However, I know the fuel pump works (it whirls up at key-on), and I do get fuel pressure (physically measured by fuel-pressure gauge) into the rails (there is fuel all the way to the injectors when I disassembled it).

• Searching in internet forums, there were some similar 370Zs/G37s "crank, but no start" issues. They've found the problem was due to a bad crank angle sensor. However, I didn't touch the crank sensor during my install, but I did have to change to an aftermarket flywheel. Furthermore, I logged some data using UpRev's RomEditor and I do get reasonable Engine RPM readings (it goes up to ~150RPM during cranking). This seems to indicate it's not bad crank sensor.

Check to see if your security indicator is solid red, maybe your immobilizer is spoiling the fun.

Did you mean the intelligent key warning light (attached pic)?
If so, then yes I did check it: it's not lit. Also - I can get myself out of steering lock as well as key-on, start, etc; so it's probably not a key/security issue

Turns out it was a mistake that I'm sure several people made before - did not install a dowel-hole on the flywheel, to the dowel-pin on the back of the rear crankshaft seal.
It's easy to miss because the pin is so small

https://www.youtube.com/watch?v=_Hz2HrMmwd4

Well that sucks, at least you found it.