89 Trans Am 3bar sensor in Torqhead LT1 Procharged

[MMGT1]

Hopefully a easy one... MAP sensor is reading about 10pa low. Found what I thought was the right offsets for the sensor, but reads 85kpa key off and is idling in the 40s, not right. Anybody else done a 3bar TA Turbo MAP in one of these and got it right?

[gtstorey]

Map Part number?

[MMGT1]

DELPHI PS10081/18023 is what I installed, got it from Rock Auto for an '89 Turbo.

[gtstorey]

Those part numbers don't show up with a search on here and they don't cross reference with anything that will have a tune that HPT will have been able to read.

But I did find this. I can't open your tune to see if your numbers match. Linear 315.58 offset 1.11.

https://www.pcmofnc.com/2020/03/12/g...r-2-bar-3-bar/

[MMGT1]

Different, I had come up with 329.45 and -6.35 for 3 Bar... Ill try that as soon as I get these miserable spark plugs done here. Thanks GT, I'll post back when I do..

[gtstorey]

Just because a sensor is a 3 Bar (or 1-2 Bar) doesn't mean they have the same values.

Edit: Just noticed your post count, so you probably already know this and I misread your last post.

[MMGT1]

This 3 bar is 100% new to me. Was a post in here that had been talking about the 89 Turbo MAP and had the math to go with it. I thought I had the same sensor they did there. Your not wrong bud, lol

[gtstorey]

Theoretically, 3 Bar for the same application should have the same values, but it seems like the sensors for old applications are all over the place. If the values I posted don't work, you may have to apply known pressure to the sensor, measure the voltage and do the math.

[gtstorey]

If I did the math correctly, the values I posted will give you 88.614 kpa. What altitude are you at?

[MMGT1]

Under 1000'. MAP sensor will read 100 or so KPA, Key On here.

[gtstorey]

You may want to check your voltage at the sensor key on engine off and do the math. If it works that way, check the wiring.

[edcmat-l1]

Those part numbers don't show up with a search on here and they don't cross reference with anything that will have a tune that HPT will have been able to read.

But I did find this. I can't open your tune to see if your numbers match. Linear 315.58 offset 1.11.

https://www.pcmofnc.com/2020/03/12/g...r-2-bar-3-bar/

I'd bet those numbers get him a lot closer to reality KOEO.