On the one that failed, and on mine - those intake airlines had been damaged by rocks and bushes pulling and scraping on them. If I remember right, one of his had been pulled completely off.
I moved mine before they sucked in dirt, but he wasn't so lucky.
If you only use it at the mall, there wouldn't be any problem.
I ran a new intake line terminated in a little in-line fuel filter.
And - while I was doing it I found the vent line from my tranny/transfer case had been damaged too. I replaced and rerouted it, then used some plastic wrap-around shielding to help it live longer.
It's amazing how much damage a bush or tumbleweed can do. I hit a tumbleweed on the hiway in my van once - it was unavoidable. It ripped out all my tailight/hitch wiring and caught the oil pressure sending unit's wire. When it pulled on the wire it broke off the sending unit - big oil leak!
I had to tow it home.
While I was fixing it I noticed a small water leak. A stick was sticking out of the lower hose. And it wasn't even a big tumbleweed!
Whenever possible it's good practice to modify things before they give trouble. ie: Do you put skid plates on before or after the damage is done?