2000 CRV, drove it for 3.5 hours drove fine no issues.
Stopped at the store, went in for 15 min came out started ok, as soon as I hit the gas it died. After 20 tries of starting I got it to start by using no throttle and only briefly hitting the key to start, like 2 seconds. it would start and idle. all indications normal. Second I hit the throttle it dies and is a MF to get started again. No codes at all. Google said most likely culprit was the main relay, I installed a new one, also checked both fuel pump fuses. both were good and relay was a no fix.
No code kinda rules out IAP, TPS and any other sensor issue. Any ideas? This is a real head scratcher.

Thanks in advance.

Steve