Hi all,I own a 2003 6SPD MT RX8, 148k km (91k miles) on the stock engine,modifications done are AEM intake and a new free flowing catalytic converter, replaced fuel pump around 40k km ago. Plus Borla exhaust, coilovers, upgraded radiator. Last oil change was around 3k km (1800 miles) ago, Coils, leads and plugs changed 12k km ago (7.5k miles), coolant and oil levels are good, no trouble.Bad experience today overall:When I started the car, the car was shaking violently while the air pump was running, this has happened once before (around a week ago) and i searched around and decided it was most probably the motor mounts which definitely need replacing since they've done 148k km. The car was cold and I hadn't started it in around 4 days.The no starting issue has happened around 3 times now, basically :If i start the car within 5 minutes of turning it off, it starts after cranking for around 3 seconds. After around 5 minutes, it cranks steadily but the engine does not start. First time this happened I managed to start it on the second go.Second time I was stranded at a gas station, but i managed to get i started by push starting it and cranking at the same time. This is where i figured that to reproduce the issue I would have to wait for around 5 minutes to start it.Third time was 5 minutes ago when got home.Knowing all the details, its probably low compression and i will probably get a compression test done on Saturday, but I would just like to confirm with you all since I am still in denial.Thanks.Startup is similar to this https://www.rx8club.com/new-member-f...please-254993/ maybe fouled plugs? I'm clawing at straws here