Mongo

But can it be used? I read some reviews a while back advising that the AEM is the better product than the Innovate as the Innovate Wideband frequently loses calibration. I don't have either so I can't provide first hand experience, but rather just would like to know which would be the better one to buy.

John Speake

Yes it can be used. Check page 37 of the ST2 User Manual. That explains that 0v should correspond to 9:1 A/F ratio, and 5v should correspond to 19:1 A/F ratio. A straight line law in between, as shown on the graph in my manual.

I have also heard thjat Innovate used to loose calibration, but I think the software has been improved since then.

AO

This may have been the cause. I assumed they were blank - a poor assumption. In any event, I will from now on pull the fuel pump fuse until I have loaded my bin file to be safe.

I was driving around today working on the EZK stuff and my baseline was around 160 knock events on a 3rd gear pull to redline. Now I might get 2 random occurances. Took me all of 2 hours. It was so easy. Thanks again for a super product.

Randy V

We've all chipped in on a lifetime subscription for you, Andrew.

Mongo

Somehow I figured that jpeg was going to popup sooner or later...

John Speake

That's excellent, Andrew. I assume you haven't disconnected the K line to your digi-dash, as was the case with ST1 ? There are speciall circuits in the ST2 so that is can cope with the loading of the digidash.

Glad to hear you have the knocks under control now.

If you load files when the engine has been stopped for some hours, then there won't be any residual fuel pressure to get pumped into the cylinders...
so no need to remove the FP fuse as the pump won't run with just ignition on.

DR

John,

I think Andrew might be on to something with the advice of pulling the Fuel Pump fuse, especially when you first install the SharkTuner on a 928.

So far due to a defective LH computer, and a defective David computer(recall my 85 Euro ST1 "ribbon" story from last week), I have hydrolocked 2 928s with fuel in the last year when trying to get the SharkTuner installed and files loaded and working.

None of these were the fault of the SharkTuner and were either other hardware or user errors....BUT it might be good practice to pull the FP fuse until you are more familiar with installing the SharkTuner and also verify you have properly functioning LH/EZK computers.

As you said you shouldn't have to do this, but out in the field you can encounter weird things and dumb mistakes can happen.

Just try to remember when your 928 won't start later, that you forgot to put the fuse back in :-)

dprantl

Can someone answer this please?

Dan
'91 928GT S/C 475hp/460lb.ft

DR

Dan,

I am not completely sure what you mean, but I assume you want to pull the code off of EPROMs that have already been tuned (not stock files). If you are worried about stock files they are included into the SharkTuner software.

Concerning custom mapped files the normal practice is to save the bin file before burning your new chips. If you have that Bin file it is simple to load it into the SharkTuner/PEMs.

If it is a "non-SharkTuner" custom EPROM and you do not have the Bin files saved somewhere I am not sure if you can simply read your EPROM with a reader and then import that file into the SharkTuner. John could probably answer that better than I can as I have never tried it that way.

Feel free to give me a call so we can go thru different scenarios to do what you are planning.

dprantl

I was thinking about plugging the sharktuner into the 928 diagnostic port and be able to read the LH and EZK EPROM and save it to a file, since I don't have the bin files. Is this possible?

Dan
'91 928GT S/C 475hp/460lb.ft

DR

Dave Chamberland discovered a new feature on the SharkTuner MK2 we haven't noticed before.

Everytime you get an engine knock it makes the computer "beep", pretty cool feature when you are doing road testing.


Without John's magical PEMs installed I don't think that is possible ???

In you need to, you can send me your EPROMs and I can read them and e-mail you the bin files and ship your EPROMs back the same day. I can also pre-load your files on PEMs for you if needed.

Bill Ball

I think ST2 requires the PEMs and won't read chips. But John includes the stock bin files, so you would load the bins into the PEMs. As he explained, the PEMs come pre-loaded. I think it's handy to have chip reader/burner and some EEPROMs so that once you get the mixture and timing tuned, you can burn the bin files saved from the PEMs onto chips and pull the PEMs for use elsewhere. Since I don't have a ST 1 or 2 and have relied on access from others, I've had to do that anyway.

John Speake

Sorry Dan, I forgot to address your question. You can't use a standard EPROM file with the ST. It uses special versions of the files. However the maps that you can load for stock MAF are identical to the "original" EPROM images.

The three fuel files are so close we didn't make 3 versions, (S4, GT & GTS) the 3 ignition maps are siginificantly different enough for us to provide the ST version of all three.

John Speake

When you first start up the ST, as long as you stay on the EPROM screen then nothing is going to happen that shouldn't, like injectors clicking. You can then load your bin files to both LH and EZK.

If you are editting a map, if possible do this while the engine is idling.

Avoid leaving ignition on when in an "active screen" like Monitor screen orMap screens.

I can add a note to the User Manual to suggest a FP fuse pull..... but it would still have the proviso that there was zero pressure in the rails.

dprantl

Ok. If I have a sharktuned LH chip in the car now, can I read it and save it with the sharktuner, or do I have to remove the chip and dump it with an EPROM reader and then load it in the sharktuner? It should already be in the special format, right? I would like to retain my current chip since it works pretty well and just tweak from there.

Dan
'91 928GT S/C 475hp/460lb.ft