North American Turbocoupe Organization



What is this?
John B Offline
Member
#1
Mystery Box

What’s the box that’s circled in blue in the picture. I know the bigger box in front of it is the ICM for fuel pump, AC clutch, fans, etc. but what is this thing? It had a piece of tubing that was connected to a nipple on the IHI inlet hose. Thanks!
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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Jeff K Offline
Administrator
#2
BARO..... barometric pressure sensor. Outputs a variable frequency square wave. Frequency depends on ambient air pressure. 159 Hz at 1 standard atmosphere, 88 Hz at zero pressure. PCM uses this output to adjust A/F ratio, timing, etc.. The nipple should be open to the atmosphere and not connected to anything!!!!

ALSO.... the orange wire with the lug on it is the O2 ground and should be connected to a bolt on the turbo inlet. With this wire not grounded, the PCM wont get the correct O2 senor voltage reading.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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John B Offline
Member
#3
Jeff K Wrote:BARO..... barometric pressure sensor. Outputs a variable frequency square wave. Frequency depends on ambient air pressure. 159 Hz at 1 standard atmosphere, 88 Hz at zero pressure. PCM uses this output to adjust A/F ratio, timing, etc.. The nipple should be open to the atmosphere and not connected to anything!!!!

ALSO.... the orange wire with the lug on it is the O2 ground and should be connected to a bolt on the turbo inlet. With this wire not grounded, the PCM wont get the correct O2 senor voltage reading.

Awesome; thank you! And I’m assuming that you mean the nipple on BARO should be open to atmosphere? The tubing that’s currently attached that ran to a nipple on the turbo inlet tube did look aftermarket. I should mention that I will running a PimpX with this new turbo setup. I’ll ask stinger as well but does anyone know if the pimpx uses the BARO?
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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John B Offline
Member
#4
Also, is the BARO the same as the absolute manifold pressure sensor?
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
Reply

Jeff K Offline
Administrator
#5
PIMP is a speed density system, and uses its own MAP sensor that is built into the PIMP. .

Yes, Ford MAP and BARO are electrically nearly identical.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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