General Discussion
Introductions, shop setups, tool recommendations, and casual chat.
Engine & Drivetrain
Swaps, rebuilds, tuning, transmission, and performance mods.
Brakes & Suspension
Upgrades, alignment, coilovers, pads, rotors, and handling.
Electrical & Diagnostics
OBD2 codes, wiring, sensors, alternators, and battery issues.
Projects & Builds
Show off your progress, get feedback, and track long-term builds.
Marketplace & Swaps
Buy, sell, trade parts, tools, and vehicles. Community moderated.
Recent Discussions
📌 PINNED Welcome to AutomotiveDIY! Read the Rules First
By Admin • Forum Guidelines & Community Standards
2018 Civic Si P0301 Code - Coil or Injector?
By MikeK92 • Misfire on cylinder 1, checked plugs and gap
Front Strut Replacement: MacPherson vs Coilover?
By JakeR • Looking for handling upgrade under $600
Complete Engine Swap: 2JZ into MK4 Supra - Day 14
By AlBuilds • Progress photos, torque specs, and mount alignment
Brake Squeal After Pad Change - Did I Miss a Step?
By SamB • Used ceramic pads, lubed caliper pins, still noisy