High idle, crappy fuel mileage. Solution?

[5.0_GT_kid]

This just started recently here in the last week or so. Car has been idling around 1000 rpms and the fuel mileage is in the crapper. What should I start checking so I can fix this problem. Mod list in sig is current.

Thanks in advance everyone.

 

[HISSIN50]

Pull codes.

 

[5.0_GT_kid]

I'll see if I can track down someone with an OBD I scanner.

 

[HISSIN50]

Or a paperclip.

 

[5.0_GT_kid]

Or a paperclip.

Paperclip?

 

[HISSIN50]

See here

Note that our test connector is on the passenger firewall.

 

[Chern_889]

Use this

With this
Checking your Ford Mustang computer codes

PS:Those connectors are located on the pass side in the engine bay, between the shock tower and firewall

 

[5.0_GT_kid]

Thanks for the info guys!