mrfred - I tried to figure this out by looking at the scaling tables you posted but I could not quite get it. Do you know the voltage the stock sensor outputs at

0psi
1psi
2psi

Thanks!!

 

Yes. Setting all 3 the same effectively gets rid of limp mode (if that mode is really even based on these maps ... I'm not sure), but you still have your low octane fuel and timing maps and knock control safety features. Also, the Min temp for full boost control table is still effective with all 3 maps tuned the same, so there is still a margin of safety intact.

If you have an IX, tune the timing tables the same as well for more consistent timing values. I was running somewhere between map #2 and #3 depending on load values. Also, I've seen timing interpolation with the low octane maps even without logged knock count, so tune those as well. I was dropping 1º - 2º at peak load for no reason at all ... this stopped when I tuned the low octane maps. The 3º in the high octane map was interpolating with the -10º in the low octane map, but only slightly. I used my stock high octane map #1 for all 3 low octane timing maps.

Hope this helps and sorry for the OT post.

Mrfred, I applied the new values to my ROM and everything seems great. I disabled the CEL before i realized that you fixed it so te CEL shouldn't happen. So, I'm going to enable it again in the next flash. Thanks for taking the time to do this for the community.

I did have one question ... I modified my definition before thinking to put all of the previous MAP values back to stock. Were all of the previous values still included in the updated definitions, or is there something I need to change that was altered in the previous MAP definitions?

 

0psi = 3.9-4.0 V
1psi = 4.2-4.3 V
2psi = 4.5-4.6 V

 

Thank you very much

 

You're welcome. I forgot to mention that those values are for at sealevel elevation.

 

got it, that should be fine as I live in NJ, close to see level.

For future reference, do you have the absolute values(boost + atmosphere) so that people at other elevations might be able to use them.

I ask because I will be using the map sensor to trigger my meth injection kit.

 

I have a graph of sensor output voltage vs pressure somewhere in the ECUFlash forum. There is an altitude correction factor at the bottom of the first post in this thread. It should be possible to work everything out from those two items.

 

For everyone waiting for a JDM MAP sensor, I finally got some more definite news on the latest batch of sensors on order. It looks like the shipment will leave Japan by Aug 21.

 

^^ sounds good

 

Thanks for the update mrfred, can't wait to get it!!!

 

mrfred,

While updating the tables with the new instructions.... I notice a discrepancy on my bin file.

In the "Change the USDM "MAP Fault Trig: Mid VE Min #1" value from 0.20 to 0.10." change, I noticed that instead of 0.20 I got 0.04.

In the "The USDM "EGR MAP Offset #2" table will read:

750 97
1000 86
1250 84
1500 67
1750 52
2000 56
2500 65
3000 63
3500 60"

Instead, I got the following:

750 84
1000 84
1250 73
1500 65
1750 60
2000 55
2500 48
3000 43
3500 23"

Any ideas as of to why the discrepancies?

 

mrfred... do you have a list of who is on the list posted somewhere ? i need to see if im in that batch lol, thanks

 

Those are values from the previous instructions. Go ahead and use the new values (some might be the same).

 

You're on it. :-)

 

thanks man.... just let me know when you need the money.