Where else do i find fuel problem at

Yes timing belt was replaced about 3 months ago

Backfiring - blowing up the air cleaner when adding starting fluid is usually indicative of a timing issue. Possibly a problem with the crankshaft position sensor but that is only a guess. It’s obviously getting ‘some’ ignition spark!

Oh no....i was hoping it was because he used too much starter fluid. It even caught fire for just a second. Is there a way i can test the crankshaft sensor? Or how could i tell if it something to do with the timing?

Compression test will find an - out of time - engine ... The proper scan tool will find a failing crank sensor. That’s about the only way to realistically determine what the problem is .. Parts replacement to try to repair can get even more expensive than professional testing. I wish I could tell you exactly what to do but that’s not possible. Perhaps you should consider contacting your local auto repair facility for guidance .. Inevitably, hands-on testing will be required. ▪️https://repairpal.com/repair-shops▪️