I need to know what the correct reading should be in the scanner when a 2 bar map sensor is installed. I put in the correct part number for the 2 bar and the car runs but when the engine is in boost it doesn't even read at 105kpa. When I have the key on but the car not running the sensor reads 2.3V but it reads 0kpa. I am using hptuners so what is the best way to calibrate it so everything reads properly? Just for more info, it is a 98 camaro with a procharger (LS1)

 

What are you using to tune? I believe in EFI Live, we change the MAP Sensor Scaler to something like 189~195 so that the scanner reports ~100kPa at key on (depending on your altitude above sea level). That's when you're using a custom OS though. Prior to the custom OS's, tuners used to scew the scaler so that the 2-bar MAP read ~50kPa at key on. The idea (if I understand it correctly) was to use the stock VE table, but only at half resolution. In other words, the 20kPa column would really represent 40kPa, 60kPa would equal 120kPa and so on. So, what are you trying to do?

 

I tried to do that with efi live before but it worked like SH*T. I switched to hptuners custom 2 bar os so I assume it should read about 105kpa all by itslef. I assume the calculation would be built into the update but I am verifying now. I just wanted to make sure also what the correct way to adjust it is.

 

We have a snap on scanner also so I just checked it with that really quick. The map sensor at key on is reading -.4volts and it displaying 0kpa??? I am very confused because I know the part number is right for the sensor but have no idea what could cause this problem

 

After you load the custom os from hpt in your pcm, you have to change your scanner settings to 2bar map. This must be changed in the main table display, as all of the other scanner charts, histograms, etc, are based on the table. Just click on the map sensor pid in the table of the scanner, delete it, then click to insert a new pid, and select 2bar map from the options. After that, change the map in whatever other charts you use when scanning.

 

Correct, however if you are using our 2bar enhancement on a 98, you can use the SAE MAP PID and you'll be ok.

CTP Racing, post on our forum and post your hpt file and hpl file as well.

 

I didn't see the 2bar map option? I selected the MAP (v). Is this correct?

 

Under pid-engine-airflow, you will have a few options. The one on the very bottom is map sensor/2bar, unless your's is different because of being a '98. Actually, just ignore me and do what Magnus said, it's his software.

 

This is on an 01 & it's not there? I must be doing something wrong? Right click, insert, engine, airflow, nothing about 2 bar.

 

Have you connected the scanner to the new pcm tune yet? The option won't show up until after it is connected to the custom OS. Then you have to stop scanning and change the parameters.

 

hey, all your advice is good..

As per your last post.. yea... connect with the scanner first and if its a 99+ 2 or 3 bar enhancement, you should see the new PID show up in the scanner, add that one and delete the old SAE PID.

 

OK thats what I'm doing wrong. I haven't loaded my new OS as of yet.
Thank You.