Yet another MAP question

[DGA]

Yes I have the standard GM 1 bar sensor. So, I am lost, what would the HPT licence do for this? I didn't buy anything but the standard HPT package I thought.

[IDRIVEAG8GT]

DGA your sig= lololololol

[DGA]

looking at your file you are not running a 2bar os. did you put vacuum to it. i need to no if you did and what in.of vacuum you got to for the sensor to read 100 kpa.

I will have to set up a vacuum source and check it. Don't have a handheld vacuum pump but have an AC one so that will have to work somehow.

[DSteck]

I would guarantee you've got a wiring issue somewhere. If the PCM is saying 300+ kPa for baro pressure, it's seeing ~15v on the input. How something isn't damaged, I have no idea.

[DGA]

I would guarantee you've got a wiring issue somewhere. If the PCM is saying 300+ kPa for baro pressure, it's seeing ~15v on the input. How something isn't damaged, I have no idea.

I have to agree. Still can't figure out why I only get 5V with key on engine off yet it shows 335 Kpa or so. Maybe I should try reversing the signal and 5V pins in the plug. I also need to trace the signal wire to the ECU plug and make sure that is correct.

[DGA]

I swapped the 5V and signal pins over and tried that. The ground is the ground so should not be a problem. I got a really low, -10 Kpa reading like this and it would not change, looking at it later it destroyed the MAP sensor. Tried pulling a vacuum on the other original GM sensor, with key on, engine off the MAP signal is still 335 Kpa, when you pull a high vacuum on it, it goes to -15 or so. Sucking on it by mouth you get low as well, about 10 Kpa. Strange.

Is there a chance the ECU has a bug in it's firmware or something? I have not checked the 5V when running the engine is the only other thing I have not tried.