ok we got the datamaster to work, now i need to know more about these numbers, like are they normal? any help or suggestions would be greatly appreciated.
open loop

closed loop

 

Your AFR in open loop is almost perfect and in closed loop you're running a little bit, but not much lean.

If you really want to monitor AFR I highly recommend investing in a wideband O2 sensor and controller. If you feel comfortable soldering check out http://14point7.com/ they have do-it-yourself wideband controllers. I have one of the older kits installed on my Subaru and it works great. A full wideband controller with sensor for only $160 is pretty hard to beat as long as you can solder.

 

Hey crab. i got a 93 z running that same program. im not a pro by far with it but i played a recording i made the other day and ran it side by side with ur two pics and yes id say its all normal in the way the numbers are all extremely close in all cells to mine. Mine runs fanf&%kingtastic. I know im lil vague here but if ur looking at to compare a specific value at a specific time let me know. or anything else for that matter. that program is great tho....lots of help in the help tab. ltr.

 

thanks guys. it has seemed to have settled down once i got a working fuel pressure regulator and pcmforless chip in at the same time with a good memcal. had to run it for a while and have gotten 21mpg on the highway. i need to find a place that tells me what the numbers do and so on. i have the burner and a couple prom chips i just dont have a pc. my daugter was running this one which is her bf s. lol. i told her to read up on it. lol. we tryed to take a recording with my camera on the road but it was totally worthless.

 

slvr i think im getting some bogus numbers from the 02s but it is way better. im going to take the plugs or some plugs out and have a look plus look at the 02s. im missing a little at low rpms and i think i may have a bum opti or a bad plug. the fuel trim cel went to 18 on thottle up whatever that means.

 

A Through C Acronyms BLM Cell -- Now called Fuel Trim Cell. The Fuel Trim cells store Long Term correction factors that correct for each engine's unique operating conditions. A cell is active within a particular operating region as determined by engine RPM and load. Most PCM's use 16 to 20 cells.


found that under the help tab i was talking about. mines mostly uses 16 but it does bounce around a bit. high as 18, low as 6 at one point in a 3 min recording.

 

im thinking that may be where my issue is. mine goes from 16 to 18 and thats it. nothing lower and nothing higher.

 

crab do you have any activity in ur "CCP DC" cell? as mine goes up the fuel trim cell goes down.