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yea i had something with the o2 sensor wiring left unplugged that caused the error codes. let me know if you have any questions about the swap

less than a year on the sensors

the maf was cleaned recently so I dont think I have a problem with it. I just changed out the injectors so could it possibly be related to anything I took apart while taking the upper intake off? I have the ohv engine

Im getting three codes for the o2 sensors. P0135,P0141, and P0155. The fuse in the box is good and I am getting power to all the sensors. I checked it with my multimeter. The codes are saying there is a fault or malfunction with all the sensors. Anyone have any ideas?

anyone?

get some 33's. youll love them

I finally got this figured out and have the motor in and running. Everything seems like its fine but I still have one trouble code to deal with. PO171 and PO174 Im not sure why both banks are running lean. The o2 sensors have 10,000 miles on them, I installed new upper intake gaskets...

why not run it cooler than 190??

anyone??

well it looks like I spoke too soon.. the camshaft position sensor is giving me problems. My wiring harness from the 97 uses 3 wires, red, blue/orange, and a ground. The new 99 motor camshaft position sensor uses 2 wires that are red/grey and blue/orange. Any ideas what to do? This is the...

Well I am half way done with this. Today I got the old motor out, took off the upper intake, fuel rail, and wiring harness. The only thing I am using from the old motor is the wiring harness and fuel rail. The plastic upper intake was exactly the same as the older one, I checked the part number...

Well I will be picking up the motor this week. I will post pics and let everyone know how it goes. Hopefully it will all go well. Thanks for the help everyone

Apparently It was just the fuse in the box under the hood. I got the diagram from the ford cd. Thanks for all the help I appreciate it.

I have the haynes and chiltons manuals for my truck, where is the ford one available? Thanks

Is there a specific fuse for the egr? I didnt notice one just seeing if I overlooked something.

I have a fuse tester I bought from kragen a while ago. I dont even need the pull the fuse theres a light that come on when I touch both points to the fuse.

Alright, I tested the EGR vacuum regulator and have no power going to it at all. I went through all the fuses in the box and they all seemed ok.

There was no engine swap on this vehicle. I have two explorers, one Im putting a new motor in, and a daily driver. The daily driver is the 99 sport with the engine light on and the codes. They were all on when I bought the car.

The fuse didnt solve the problem, I still have all the codes. I have a scanner to erase them, but they came back after 5 minutes or so..

Turns out there was no fuse in there at all...Very strange. Put one in and erased the codes but the light came back on. Havent had a chance to see if its still reading those o2 sensor codes but I will tomorrow. I still have the P1409 and the P1451 though..

Yes they are both OHV. I did see some other threads but none about swapping a later model OHV with another, just wanted to make sure there was nothing I was overseeing considering its my first swap. Thanks for all the help

I have a 99 explorer sport im working on and I have 5 different codes to deal with. P1409 P1451 P0135 P0141 P0155 I know the last 3 codes deal with the O2 Sensor heater circuit on all 3 sensors, but I dont know what would be wrong. I have been searching a little bit but cant...

My explorer has a head gasket leak with 136,000 miles on it. Starts and runs but is a little rough. I have a motor lined up to buy out of a 1999 explorer that was slightly rolled. The motor has very lows miles and should work perfect. Im just wondering what problems I may run into swapping them...