At start engine races with squealing noise.

Greetings.

We have an intermittent issue at start up.
The engine races with loud squealing noise that sounds like a belt. It's happened twice, both times we immediately turn the Taco off and it restarted fine. No check engine light.

Has anyone seen this. Knows what it is?

Thanks in advance.

 

@LuigiMac, how many miles, which engine. more details are needed. Have you ever replaced the fan bearing. Information, we need information.

 

Its a belt.

 

The truck has 210k miles and we've only had it since March. I don't know if the fan bear has ever been replaced, if that started to seize would it cause the high revs?

Thanks

 

i vote loose belt too

 

Mine was alternator belt. Because I had to remove the first two to get to it I replaced all three. No more noise.