If you are supercharged the stock map will read up to 104 KPA but he above KPA and voltages are correct...
91 vette.. what should the map sensor read.
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Originally Posted by mos90
im just making sure everything is working properly, what range should the map sensor voltage be ?
My KPa readings are with stock cam (not you case)
idle in park or nutral: about 34 or 35 Kpa at 775rpm
idle in D with brake pedal on: about 43 or 44 Kpa at 675 rpm
At KOEO: 99,9 kpa
at WOT : up to 99,8 kpa
HTH
-Beppe-
Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 60
From: Fremont Oh
KPA is Kilopascals it is metric for pressure readings 100 Kilpascals =14.7 psi or atmosheric pressure
21" Hg = ~30 Kpa
18" Hg = ~40Kpa idle
15.5 " Hg = ~50 Kpa
10 " Hg = ~70 Kpa part acceleration
7" Hg = ~80 Kpa harder acceleration
4" Hg = ~90 Kpa vitrually wide open throttle
0" Hg = 100 Kpa WOT
" Hg is inches of mercury
Hope this helps...
Mo
21" Hg = ~30 Kpa
18" Hg = ~40Kpa idle
15.5 " Hg = ~50 Kpa
10 " Hg = ~70 Kpa part acceleration
7" Hg = ~80 Kpa harder acceleration
4" Hg = ~90 Kpa vitrually wide open throttle
0" Hg = 100 Kpa WOT
" Hg is inches of mercury
Hope this helps...
Mo
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Since you have a 91 (mine is a 90) you have an $8D code.
The $8D code outputs the MAP sensor ADC counts. This can be converted to a voltage by:
VOLTS = ADC * (5/255)
To convert from ADC counts to KPa I use:
KPa = ADC * 0.369 + 10.415
-or-
(KPa = ADC * 0,369 + 10,415)
-Beppe-
The $8D code outputs the MAP sensor ADC counts. This can be converted to a voltage by:
VOLTS = ADC * (5/255)
To convert from ADC counts to KPa I use:
KPa = ADC * 0.369 + 10.415
-or-
(KPa = ADC * 0,369 + 10,415)
-Beppe-
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