https://www.ft86club.com/forums/ Discuss all software tuning topics. en Sun, 01 Nov 2026 01:30:41 GMT vBulletin 60 https://ft86club.com/forums/images/misc/rss.jpg https://www.ft86club.com/forums/ https://www.ft86club.com/forums/showthread.php?t=155926&goto=newpost Fri, 16 Oct 2026 16:26:37 GMT I recently had my 2016 supercharged BRZ's engine rebuilt. The builder turned down the compression from stock compression to 9.5:1 without even consulting me. I believe this is a big drop in compression.

After receiving my engine, I reassembled the other parts and put the engine back in the car. My vehicle won't start but it does crank with the RPMs jumping around 350 when it's trying. There's a smell of gas from the exhaust, compression tests are fine, spraying starter fluid down the charge pipe doesnt work, splashed the fuel tank with fresh 93, crank sensor plate is installed correctly, battery is charged, ground wires are correct.

When cranking, sometimes a little rumble can be heard like it's about to start but that's it. I believe the problem is that the engine is running far too rich to even start because the vehicle was previously tuned for 93 on stock compression with the supercharger.

All things considered, I believe my option moving forward is to flash the ECU to a tune that could better accomodate the lowered compression. What options do I have? It was tuned with ECUTek prior. I would like to keep the license and I dont want to tow the car. I own no tuning equipment and I dont know anybody who does.

Thanks for reading this. ]]> Software Tuning Acanaceous https://www.ft86club.com/forums/showthread.php?t=155926