New 98 Truck, Old Codes.

[midsouthgeek]

Hello readers, I have recently bought a 98 Mazda b4000. It had many cel codes. I started with the IAC valve and MAF sensor. Both cleaned and runs fine. Also replaced gas cap. I still have the three following codes. Any insight on where to look will be greatly appreciated. Thanks in advance.

P0171
P0174
P0453

 

[TxGasRacer]

http://troubleshootmyvehicle.com/ford/4.0L/troubleshooting-P0171-and-P0174-page-1

 

[midsouthgeek]

Thanks will try these this weekend.