Hey guys hoping for some help deciphering these codes... it's not so much the codes themselves but what they mean...

Some history (if I'm doing this link right) here's my original post regarding this truck...

https://www.ford-trucks.com/forums/6...efi-101-a.html

...just got sick of messing with the truck so I parked it out in the backyard a ways back. Got back into the mood last night and pulled it back into the garage. Ran the KOEO test this morning.

First Q - Should the engine have been warm / hot before running this KOEO test??? I ran this test with it completely cold, engine not started since last night.

Here's my codes...

21 = "ECT out of self test range 0.3 to 3.7 volts"

I'm not sure to take this as my temp sensor being 'bad' or just that the engine was cold when I ran the test.

26 - (Seems to have two results) 1) "MAF was greater than 0.7 volts with engine off" 2) "TOT sensor out of self test range .03 to 3.7 volts"

Far as I understand I don't have a MAF because this is a 1990 351W / e40D and has the MAP sensor on the firewall. Far as Trans Oil Temp, I am wondering once again if that's just because I ran the test cold.

24 - "ACT sensor out of self test range .03 to 3.7 volts"

I have no idea what sensor / where reads the air charge temperature. Is that INTAKE AIR temperature or the A/C charge?

The second set of codes ("CM") just read 11 - 11 which I assume just means that the Continues Memory is working.

Help??? Got these codes but I'm seriously hurting for the knowledge / experience of what to do with them next.... sorry for such a long post....

 

Okay, I truly feel like a dumba__ here. Went to fordfuelinjection.com to find out how to RUN the test... but then I just didn't bother going back to try to interpret the results before I posted here. At least two of those sensors (if not all three) need to be warm before the test and it's probably about 30-35 degrees MAX in my garage right now. DUH. S'pose I ought just delete this whole post. Wow do I feel dumb.

 

Your truck needs to be warmed up.