strange Sound when put the key at On Position

[Mbrooks420]

Yes.

 

[alawneh]

ok, thanks, i will try and inform you.
but i think the fuel pump located at the fuel tank itself.

 

[Mbrooks420]

The pump is definitely in the tank.

 

[07EddyB]

it is under the hood

I'm going to go out on a limb here and say no - it's not coming from under the hood. At best, something inside close to the firewall.
One guess would be a blend door actuator.

 

[gdgiordano]

I'm going to go out on a limb here and say no - it's not coming from under the hood. At best, something inside close to the firewall.
One guess would be a blend door actuator.

Isn’t that in the cab? Also why would it move every time before cranking if the nob hasn’t moved?

 

[07EddyB]

Isn’t that in the cab? Also why would it move every time before cranking if the nob hasn’t moved?

Yes - that's in the cab. I can't think of anything that moves under the hood. My thinking is maybe the blend door tries to reset itself at startup. Shouldn't happen if the climate control is off but we aren't really getting any good feed back from the OP so I'm not assuming anything.

 

[gdgiordano]

Yes - that's in the cab. I can't think of anything that moves under the hood. My thinking is maybe the blend door tries to reset itself at startup. Shouldn't happen if the climate control is off but we aren't really getting any good feed back from the OP so I'm not assuming anything.

Gotcha. I know mine doesn’t move on startup. Even if system is off the blend door will move with the nob. I can hear mine move and it doesn’t move if not told to move. It could vary year to year though. Given the blend door issues I move my temp with the system off to lessen the strain. The temp is always immediately what I set it to. I can hear it moving like I said.

 

[Mbrooks420]

The blend door actuator is on the passenger side under the glove box.

 

[katsov]

It's the headlight fluid pump, j/k!
I think we need more description from op

 

[07EddyB]

The blend door actuator is on the passenger side under the glove box.

Mine was on the drivers side of the console. Maybe different from the 98s.

 

[D Hook]

The OP is a bit stingy with information to help anyone diagnose this so this is all just speculation.

 

[alawneh]

thanks for all replies,

 

[alawneh]

The OP is a bit stingy with information to help anyone diagnose this so this is all just speculation.

it is not a stingy issue, as I told you it is a strange rough sound comes from the hood, seems to be from the driver side, happen when putting the key at on position for 1 second then disappeared. if i return the key back to off position and then go on position there is no sound.

 

[Explorer_PL]

Any chance recording it and attaching a clip or youtube video ?