Today I was doing a second gear pull and at about 6000 I had a huge hesitation as if I had let off the gas and a huge pop/backfire. My power band has also been acting really funky lately, the car feels like it goes in and out of power almost. I pulled my spark plugs to check the overall health and I'll be compression testing soon, just waiting on my buddy to head over with the tester.
Any opinions or thoughts on what I should check out first? I'm thinking it has something to do with fuel as I run into more problems on a low fuel tank.
It seems like there might be oil on the threads of the spark plugs? The previous owner had a compression test done about 1 year and 7 months ago, I've included pictures of the test and all of the plugs.
I'm still running the stock injectors and I don't know when the fuel filter was last replaced. Spark plug is a BCPR7EIX.
Mods-
HKS Downpipe
Catback Exhaust
Apexi Intake
Splitfire Coils
Tomei Fuel Pump
New WS coil pack harness
Re-soldered and cleaned MAF Sensors