Hondata

FWIW this little tidbit should be in the sticky! It would have saved me ALOT of time and effort.

you were totally right on the map sensor! I dont understand what the purpose could be of having the MAP sensor not sample during KEO, when nearly all others do? Weird!

Thanks a bunch on that one. I was going system by system on the car before running it and the MAP zero was a red flag for me.

O2 ...

Wont run long without map sensor. runs only if you get the afr right via TPS. MAP doenst read.


Well I just finished re-socketing the 1st PCM for a normal chip and installed crome/Freelog. guess what. Reports correct voltage from the MAP and O2.
Starts and runs.
So at this point there can be no ...

I can, But I can tell you it's merely one of the provided stock calibrations for a P28 with the Injector constant changed,and MSD3 bar map sensor selscted.
There really isnt any datalog other than a "normal" obd1 pcm that's key on engine off.
MAp sensor reads zero KPA instead of ambient pressure
O2 ...

The update firmware is grey'd out. Do I have to jumper or something?
I dont have it plugged into the car right now But I beleive it said the firmware was 1.07?

I just installed the PCM into a known working OBD1 car and it still is Malfuctioning the same way.

So to retiterate
2pcm's
2cars

no map signal and 3.81v in the O2 slot. All other sensors fuction properly.

WTF? can it be anything other than the S300 itself? software bug? any known issues?

So I guess Im the only one that this has come across this issue?? DOH!

I wonder what the hell is going on there? If a chase 1.6V right up to the input Cap, how the hell is it reading ZERO on Smanager?
Same with the O2 situation, 0.1V right up tot he input cap, but it reads 3.8V in the Smanager? how ...

I ahve a customer that brought me a car (in pieces of course) to get it straightened out. it's a
97 civic
H22 swap
obd1 pcm (have tried both P28 and P72)
obd1-2 swap harness
S300. serial number s300-5383
3bar MSD map sensor
AEM wideband

The issue is this, I have updated all software (I just ...