I cant get my scan tool to work and i have a few codes but
I suck at decoding them using the engine light hope someone
can help me out.

Thanks in advance

 

Whatever this is, it's not working!

 

fixed it lol sorry about that

 

511= EEC processor ROM test failed
159= MAF out of self test range
636= TOT sensor out of self test range
565= canister purge circuit failure

 

These are 3 digit numbers? I thought I had 2 digit numbers.

its a W4H0 EEC out of a 95 mustang.

 

Nope! OBD1's go up to 998. I believe #511 means you no longer have a functional KAM (Kept Addaptive Memory). I'd be tempted to disconnect the battery for a minimum of 5 mins. & see if it reboots. You should drive it 10-20 miles w/ multiple completed warm up cycles before rescanning. #159-Clean your MAF sensor & see if that drops back in range, check your canister purge circuit connector (something makes me think you've eliminated that). For the #636-Check the connection & a can of Transtune in the Tranny fluid if the connection is clean & solid. The Trans fluid temp is coding out of range (could be hi or low) One reporters opinion /This is the stuff I'd do if it were mine, but I'm guessing your truck had a much different (maybe unique) history than mine. Your truck's background info is limited, including the year.

 

Thanks for the help the both of you.

And to ymeski56 sorry for the limited info
Its a 95 F-150 the EEC was swapped out for a 95 mustang EEC
so I could use the Tweecer RT old computer would not allow
me to data log.......Speaking of the Tweecer Am I getting a 511 code
because its chipped?

and for some of the mods

347 Stroker
AFR 225 heads
42# injectors
LMAF 90mm
systemax 2 intake
Accufab 90mm TB

and obviously Tweecer.

 

They switched from 2 digit to 3 somewhere around '91, some even use both 2 and 3 digit. I'm thinking computer or wiring problem since it isn't allowing your scan tool to work either. Do you still have the truck computer to try?

 

Ok fixed the MAF code

still have

511
636
565

at this moment not worried about 636 now 565 I found out the
purge valve is bad

as for 511 when I pulled the chip it went away I have to check my
tune and make sure I zeroed out my checksum.

 

Update set checksum to 0 code 511 gone
I thank you for your help.