13.0 is rich for idle, but not WOT. It's actually a little leaner than I like to go at WOT.

Stock they'll be in the 11's, sometimes the 10's. That's rich. It's also how they're programmed. Perfectly normal unless they've been tuned.

 

anyone know where I can get a OBD1 PCM pretty cheap?

 

Looks like my problem is not unique. My dyno graph looks similar to yours.
I have replaced the opti, coil, ICM, PCM, plugs, and valvesprings with
no change. It would be nice to figure this out.

 

what else is left...?

 

I'm some what tired of throwing money at it and hoping it will work as well.

 

My dyno is the same Sometimes it breaks up worse the others.I can second that statement,Im def. tired of throwing money at the car hoping itll fix it,Ive spent atleast $500 doing just that and Nothing has worked!The only thing I havent done is New PCM or Lifters,This sux

 

im going to try the PCM first, because i need to convert back anyway. If that doesnt work I guess the only thing left is the opti.

 

This is interesting. It sounds like everyone is having the same problem but different things are fixing the problem or in some cases not at all. I am also having a similar problem. My car was breaking up really bad when I first got it back together, usually starting around 3500-4000 rpm's. I took it to get tuned and the tuner said to replace the opti. My dyno graph looked just like the others in this thread. I replaced the opti and it got better but it was still doing the same thing just higher in the rpm band, around 4500 now. I took it back to the tuner and he made a few more pulls. He was even puzzled at this point. The dyno graph this time climbed a little more steadily but had a dip in it every couple hundred rpm. He said the fuel looked fine and everything he graphed coming from the motor looked fine. He said try changing the coil and bring it back. I am now changing the coil, plugs, and wires before I bring it back out from storage. I did notice one of the wires had a slice in it so I'm hoping maybe that was it but I won't be able to tell until I take it out in May. Sorry about the rambling long post, I just hear where you guys are coming from. I am very frustrated and hope I can figure this out soon. Thanks.

Brian

 

It would help if you guys would get a datamaster log while on the dyno.

 

I no longer have my file but I had my car on datamasters during this RPM miss,I do know what to look for and I didnt notice anything out of the ordinary,Everything looked good,o2's,Inj. pulse,Inj DC,Pulled a lil timing=false knock,A/F is around 12.5 til 5k then when it starts to miss the A/F slowly approaches 13.4 which is kinda lean but I think thats due to the car missfiring.So Im about clueless,Also I have a Delteq on my car so I figured that canceled out it being the Opti,But I think I might be wrong.

 

FIXED! Turns out to just be some bad O2s not throwing a light, must of been telling the engine it was lean, so in turn it was just dumping all the fuel it had.

Man im glad it wasnt the opti.

 

OBDI was the solution to my problem. I don't really know why it fixed the
problem, but for some reason the OBDII PCM was not able to do the job.
I had even tried two different OBDII PCMs. The dyno graph in my sig shows
the two runs (OBDII and OBDI) and the difference.

 

the doesnt make any sense.....why would your car just stop accepting OBDII?

 

Cory,

I still feel that the O2 sensors were the problem, but only death and taxes are certain.

I would still like to try and hook the fans back to the pcm instead of on fan switches to see if the OBD I PCM will activate them, remember we had suspected the OBD II PCM's circuit was grounding out and would not let the fans turn off. If the PCM's ground was the problem, there's that chance that it could have been the PCM causing the miss, because if that circuit was able to go bad then what if another circuit somehow related to fuel was also able to be bad.
We will probably never be 100% sure since we did not swap the PCMs then run the car and see if the mix was fixed, instead I swapped the PCm and O2s at the same time.