Hey I built this 5.0 for my 92 f150 and I put it in and got a list of codes, I've replaced the tps, egr, and checked for vacuum leaks using a propane torch. I got rid of all codes except code 22 map sensor out of range. And the truck is idling really rough, I've been trying to figure out what to do for a couple days now. I changed the map sensor and it didn't change anything. Anybody have any ideas

 

How do the plug pins and wires look going to the MAP sensor?

 

The wires and pins look good. Also I didn't have this problem before I changed the engine and its the same harness

 

Also runs very rich at idle and perfect mixture at anything over 1800rpm according to my auto meter gauge

 

Well... did you replace the MAP sensor?.

 

Yes at the end of the first thread it says that

 

Which set of tests are you running? Key On Engine Off (KOEO) and Continuous Memory (CM) display or Key On Engine Running (KOER)?

How are you reading the codes? Counting flashes or a code reader?

 

I've been doing both

 

And using what to read the Codes? I suggest you stick to the KOEO tests/CM display until you can get a System Pass code of 11, then repeated (11), for both the KOEO tests and CM display. You may need to clear the CM by pulling the jumper when the codes are displaying.

I caution you if you are counting flashes to read the code to not misinterpret the System Pass code of 11/11 as a Code 22.

 

It is definitely 22. Yesterday I got system pass 11 but today it's gone. Once a day there will be a time that it runs smooth. For only like 10 seconds and the first start up of each day it starts right up no problem then after that it cranks over for a while before it starts

 

It's time to start tracing put wires to verify the MAP signal is getting back to the PCM as well whether or not it is getting VREF from the PCM.

For reference:

Fuel Injection Technical Library » Manifold Absolute Pressure Sensor (MAP)

Ford Fuel Injection Truck Computer pinouts

 

I actually removed the injection harness and vacuum lines and Ill be putting it all back on after testing every wire and re-wrapping it. I found a section of the harness that was melted, even though its a separate harness from the map sensor I may as well fix it

 

Hey Dave, don't forget that you should check pin out between the two computers.

 

Just for grins.......

Did you replace an old 5.0 with your built 5.0 ????
Hopefully not an old 4.9 with a built 5.0.......that'd cause some computer issues.

Bob

 

Nah my old engine has 5.0 stamping on the block under the intake and so does my new one