turns over but no start

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Sounds like you've been busy under the hood! Since your Camaro turns over but won't start, and you've replaced the serpentine belt, idler, and tensioner, let's focus on the basics—fuel, spark, and air. Even though you hear the fuel pump, it doesn’t always guarantee the right fuel pressure, so checking that with a gauge could be worth a shot. Also, take a look at the spark plugs and ignition coils to ensure you’re getting a strong spark. Sometimes after belt replacements, wires or sensors like the crankshaft position sensor can get knocked loose or damaged, which would cause a no-start issue. Another possibility could be a missed connection during the repair, especially if it’s cranking but not catching. Double-check all the connections around the area you were working on, just to be sure. Hope this helps you get that Camaro roaring again! If you need any further advice or if you'd like any help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!