3 bar GM map sensor trouble
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From: Tampa, FL, United States
3 bar GM map sensor trouble
ok so I turn the car on and it idles very low like 400 and if i give it throttle it doesnt respond well and then stalls. could it be that my map sensor is just bad? any way to test it.
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Joined: Jan 2003
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From: A Place in, Florida, USA
Re: 3 bar GM map sensor trouble (non-VTEC)
Yes his KPro is properly setup for his three bar 
I would hope so being the boost gauge usually says 20 PSI at WOT 
Alberto, like I said on the phone I am 99% sure it's the map sensor.
I would hope so being the boost gauge usually says 20 PSI at WOT Alberto, like I said on the phone I am 99% sure it's the map sensor.
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Re: (dategb16vortech)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dategb16vortech »</TD></TR><TR><TD CLASS="quote">can you run a 3 bar map with a hondata s200b on a p28 ecu or does something need to be burned into the ecu to make it run properly</TD></TR></TABLE>
The eprom must be setup to work with the map sensor.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iGfrequency »</TD></TR><TR><TD CLASS="quote">You can test the voltages of the 3bar to make sure it's sending out proper signal.
should read 1.6v from the map to the gnd wires. </TD></TR></TABLE>
+1 check the sensor voltage.
The eprom must be setup to work with the map sensor.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iGfrequency »</TD></TR><TR><TD CLASS="quote">You can test the voltages of the 3bar to make sure it's sending out proper signal.
should read 1.6v from the map to the gnd wires. </TD></TR></TABLE>
+1 check the sensor voltage.
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Joined: Jan 2005
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From: b00sting my D16s, SoWis, USA
Re: 3 bar GM map sensor trouble (jsimon9633)
Take it up near WOT (low vacuum/boost) and it should run fine. The problem with the 3-bar, which is plauging uberdata users mostly, is that the GM bar sensor's real reading in high-vacuum are totally off (non-linear) compaired to the datasheet. IIRC, -22 in/Hg is read/output as -27 in/Hg. I bet if you stuck a wideband in and tested it, it'd idle very rich. Rich + added throttle = more gas injected, resulting in stalling/hesitation.
And FYI, the only GM 3-bar sensor that won't function like this...is a fualty one.
edit - and before I forget, the GM 3-bar also tends to give strange readings above 22psi according to most users.
And FYI, the only GM 3-bar sensor that won't function like this...is a fualty one.
edit - and before I forget, the GM 3-bar also tends to give strange readings above 22psi according to most users.
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