I have been chasing some issues I've been having with this truck for a while. I finally got AE software to start looking at some sensors on this truck. I just tried a new MAP sensor that I ordered from Riff Raff. This is the sensors I looked up and this is the numbers I got. At both KOE off and KOE on.


Manifold absolute pressure 12.6psi KOE off - 12.8 at idle
Manifold Pressure Gauge 0.1psi KOE off- -0.3 at idle
Barometric Pressure 148 psi Same
Barometric pressure volts 3.86vlts Same
Exhaust back Pressure 43.5psi Same

What is happening with my readings? Is it just that I have a bad PCM??


Pic is of after I plugged the EBP sensor back in. It was in a fooler.

 

Honestly its starting to feel like I'm just chasing my tail with this. There just seems to be 5 new issues everytime I fix one.

 

I third that wave.

 

I'm going to ford tomorrow and am going to replace the Baro Sensor. Apparently it controls a lot of the timing for our engines.

 

I found some very useful information on a website for my current situation as par as PID parameters go.
http://oregonfuelinjection.com/pdf/f...diagnostic.pdf

 

I got a 1k potentiometer to use for BARO


Connect out side connections to power
Connect middle connection aka wiper to PCM
Adjust for 4.7 volts to PCM


Save a hundred bucks


I don't go over 2000 feet above sea level so it should work out fine for me.

 

I can't begin to pretend that I understand how to do that. I just unplugged the sensor and it reverted back to zero. Man is the truck violent. When it shifts there's no warning and u better have a mouth guard in. But it is a BRAND NEW tranny with a stage 2 shift kit in it. So I guess some firmness is to be expected. Even without the chip in it feels like it's running with 100 more horses. I'm kinda afraid to put the chip in. I ordered a baro sensor from ford, it should be in tomorrow. Lol took some time to cross reference the obsolete part

 

your EBP is also high and can affect shifting

 

Baro removed will cause hard shifts.

 

Oh ok. What causes hard shifts, shifting too early, shifting too late, tranny pressuring up, or combination of all?

 

The PCM uses a bunch of parameters to determine shift points.

 

Do you have a loaner PCM you can try to see if it makes a difference?

 

I wish. But the only one I have access to is a sd pcm.

 

I just got a new BARO sensor from ford. It immediately went to 148.. Whats happening here. If I take the BARO off it goes to zero and shifts really hard. How many volts are supposed to be going through the BARO sensor?? Im running 3.86 volts to it.

 

Is 4.7 volts how many volts Im supposed to be showing? If so then Im off almost a whole volt.