''check electronic throttle system''

Question edited for clarity and add maker.
Question moved to model category.

Here is the vacuum lines diagram. I would also suggest that you clean the Throttle body, and the MAF.

https://www.google.com/search?q=2005+ford+expedition+vacuum+hose+diagram

You also need a good pro grade scan tool computer to check for other issues.

https://www.google.com/search?q=auto+electrician+near+me

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no they will not

it has two timing chains

Its possible that you need any valve adjust? Check it and tell us news.

more thatn likely its one of the rear hvac unit actuators

Take the vehicle to any local auto parts store that will read the codes. WRITE THEM DOWN, and report back here for further help.

They are round "cans" with wires attached. You should have SSA, SSB, SSC, Torque converter and Pressure Control solenoids. They control pressures and have no mechanical linkage.

We have been experiencing same faults on a 2005 Expedition,with engine stopping and the message "Check electronic throttle". Ifirst went to AutoZone and they read the codes. They suggested replacing thethrottle sensor, which we did, but car stopped again. We had to replace thebattery in a month and this is the fix. The battery was almost 6 years old andwhen you first start your engine, it sucks too much load and gives these faultsto the computer. It never stopped since then (3 mo already). Sometimes we useto get the message 3 times a day.

should have some kind of fault light on to read fault codes

its mostly an electronic solenoid shift system
could be a transfer box fault

bad battery with dead cell
dead cells wont be seen on battery test
or alternator not functioning properly
you left your lights on somewhere in vehicle or connected to this a defective door switch when doors closed leaves lights on