Ported stockers from my 94, and the cam would not pass smog without serious work. I am considering going with some AFRs and maybe a stroker in the future, I really have little idea what I'm going to do and I suffer from indecisiveness I have 2 cars to work on and 'hop up' now which is also going to slow things down and force me to prioritize, I like the 240Z for its road handling abilities, but I'd also like to get some serious road stick on the Camaro too, because driving a 240Z all the time just about makes you clausterphobic, so I miss the land cruiser every now and again.

Have you emailed Tunercat about an ETA on OBD II stuff? I'd be curious to hear whats doin over there on that end. If you every go OBD I though I'll always be around to help, there are fair number of folks in the south bay also, and some Fremont guys.

I forgot to mention the early 5 speed in the 240Z, I want to try to hunt down a late model NA 5 speed, its a close ratio and has a much nicer .745 5th gear. Right now the car runs a mid 15, but I dont drag it myself, the guy I bought it from is a gearhead as is his dad. The dad is a tool and die guy, with a couple 240Zs, one of them with about 400 HP with a T5.

A guy in Sac just ran a 12.07@ 119 with a stock LS1/T56 setup, no posi!

 

Are you saying that the scan software shows the total misfire count for all 8 cylinders, but it only showing a misifre code for all the cylinders except 5 and 6?

Or are you saying that it has a field for total misfire count for all 8 cylinders, but there is no data registering in the space in the data fields for 5 and 6? If its this one, call the company that sold you the software and ask them to look into it. Seems to be a bug in the software.

"not making the wires up correctly" can cause a misfire, but it isn't going to cause the misfire data to disappear from the PCM. The misfire data is generated by the PCM based on the spacing of the signals from the crank position sensor. No way a poorly made wire is going to fubar the crank sensor. That's why if you are getting data in 6 of the fields, and missing data in two of the fields, it may be a software bug.

Can you watch the misfire counts and see if they start to mount up right at idle? If so, that would indicate a problem with the low load cam programming.... the idle will be too choppy, and it will continue up in the rpm range at low loads.

 

Well there are fields for misfire like this:
Misfire Cylinder 1
Misfire Cylinder 2
Misfire Cylinder 3
Misfire Cylinder 4
Misfire Cylinder 7
Misfire Cylinder 8
Misfire History Cylinder 1
Misfire History Cylinder 2
Misfire History Cylinder 3
Misfire History Cylinder 4
Misfire History Cylinder 5
Misfire History Cylinder 6
Misfire History Cylinder 7
Misfire History Cylinder 8
So I was wondering why there weren't any fields for 5 and 6. I emailed Alex Pepper but no response yet...I emailed 2/8. I thought maybe cylinder 5 and 6 weren't firing or something...just looking for a way to explain whats going on with the car from the graph in the first post.
There are a few misfire counts but very rare...very very rare. It just goes something like this:
Misfire Cylinder 1 0
Misfire Cylinder 2 0
Misfire Cylinder 3 1
Misfire Cylinder 4 0
Misfire Cylinder 7 1
Misfire Cylinder 8 0
The History field still shows 0 for all cylinders though. Also I am getting a lot of spark retard like 12-20 degrees at idle and much higher at higher rpms say 38 degrees or so...why? The car does run fine though and I haven't had any problems beside the high rpm miss...at idle it is usually fine if its warmed up. Idles at about 8xx(from the scanner) but shows up as 1000rpm on the tach...I noticed its off by a few hundred(the tach that is). Also is there a way to update how fast this software updates the screen...is freescan or autotap this slow as well. It takes about 15 seconds or more to update the data...the virtual dashboard becomes pretty useless.

 

Freescan lets you select latency, I think Datamaster does to but I dont like it, so I dont really use it. However of course there is a limit to how fast things can be. Even on my 486/25 MHz, with Freescan I'd get about 1 frame a second which is WAAAAAAAAY slow. OBD II is faster than OBD I, so I'm puzzled that your getting a frame every 15 seconds? Thats pretty much worthless for tuning, even 1 FPS is not going to cut it in my opinion.

4 frames per second starts to get workable (subject to each cars power level/setup and user opinion), but to some degree the more the better.

 

The more input I'm getting the more I'm thinking about just returning this product and switching over to OBD1 and using TunerCat and FreeScan. My laptop is a pentium 166 running NT so I doubt thats what is slowing it down. It did show 11degrees of knock retard when I did a WOT run but it said the knock occured at 2280 rpm...I don't think it was correct because of the slow frame update. I will wait for a reply from OBD-2.com before I make up my mind though. I just didn't want to lose OBD-2.

 

I sort of see what you mean, and I dont know the book on swapping over, but it doesn't seem like that much of a hassle.

As for smog, some guys that are doing the PCM checks just shrug and let you pass, I dont doubt that may happen as well as it may not last very long, who knows at this point, if and when it comes. By that time though hopefully something will be out, but I really am supprised you expected the car to run decently on a stock tune

Thank goodness we have knock sensors eh?

I had various computers with Freescan, and with my P233 that I had with Winders 98, I believe I was getting 5-6 FPS, which was plenty fine for me to work with. I didn't run the lowest latency either, just standard 100ms. While the OBD II port is faster, I really dont know how much more data is coming through, certainly not so much though that you get 4 frames a minute, thats obsurd. Thats a question for the LT1 Edit list, this forum is still pretty much the dead area of the site.

 

How do I get on the LT1 Edit List?? Seems you are getting lots of info from there.

 

I am not on the list anymore, but yes there is tons of info. There are various subscription options, you can read via the web or get it in digest mode (one or two big emails intead of individual).

www.lt1edit.com