Turbo Pressure Sensor

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Turbo Pressure Sensor

Postby InitialD93 » Mon Dec 12, 2005 5:57 am

Does the TPS sensor go by any other names..... i know this sensor regulates fuel cut but does it do anything else?
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Postby erolit » Mon Dec 12, 2005 7:40 am

TPS = Turbo pressure sensor. on the st185 it provides a pressure signal to the ECU from which the ECU calculates fuel cut. It also has a separate wire connecting it to the stock boost gauge on the dash board.

Appart from these 2 functions it serves no other purpose. There is no pressure sensor based fuel/ignition corrections on an st185 ECU.

If you electronically disconnect it from your engine (ie you cut the PIM wire, unplug the sensor wiring harness etc.) the ecu will begin to calculate fuel cut based on the signal from your AFM & throttle position, and when you hit airflow based fuel cut you have to reset your ECU (by pulling a battery terminal). Basically dont do it.

It will also (by some means which i have yet to establish) pull ignition timing much more readily with the sensor electronically disconnected.

If you want to kill fuel cut, the best way to do is is to unplug the vacuum line from the TPS, and leave everything as it is. This is 100% effective with zero side effects (except for complete absence of pressure related fuel cut)

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Postby InitialD93 » Mon Dec 12, 2005 8:05 am

this is for ST165... so im assuming the same is true... i have a real boost guage also so no problem there. got another one for you.

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Re: Turbo Pressure Sensor

Postby toayoztan » Mon Dec 12, 2005 10:35 am

InitialD93 wrote:Does the TPS sensor go by any other names..... i know this sensor regulates fuel cut but does it do anything else?


Some call it map sensor (manifold air pressure sensor)...i personally don't call it that b/c it doesn't actually determine anything for fuel maps (soley AFM).

Also called BPS (boost pressure sensor), and i personally like to call it this b/c TPS just keeps clicking Throttle Position Sensor into my head.

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Postby nfn15037 » Mon Dec 12, 2005 1:43 pm

MAP = Manifold Absolute Pressure sensor.
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Postby RIalltrac » Mon Dec 12, 2005 2:10 pm

Dustin I think those other things are for the A/C system, not 100% about it though. I would have to pop my hood and look at it real quick.
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Postby Cashback » Mon Dec 12, 2005 3:46 pm

I looked up the part number on those and, if I remember correctly, they are both for AC. One is a temp sensor and the other is idle up control.

I don't remember exactly, but I do remember they don't do anything I care about.
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Postby 88st165 » Mon Dec 12, 2005 4:00 pm

where is the turbo pressure sensor located on the 165?
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Postby InitialD93 » Mon Dec 12, 2005 4:08 pm

bottom one is the TPS i think... no idea what that top one is
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Postby 88Allheeze » Mon Dec 12, 2005 4:45 pm

The bottom one is the MAP sensor and the top one either is for the powersteering idle up or deals with the ac. I cant remember what it went to its been soo long ago. but i removed mine with my ac.
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Postby Gary » Mon Dec 12, 2005 4:46 pm

IIRC, the top one is for A/C
The bottom one, I'm sure, it is turbo pressure sensor.

Like Bryan said, everytime I heard TPS, I always think the Throttle Position Sensor. I'd rather call it MAP sensor.
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Postby Cashback » Mon Dec 12, 2005 7:06 pm

Gary wrote:IIRC, the top one is for A/C
The bottom one, I'm sure, it is turbo pressure sensor.

Like Bryan said, everytime I heard TPS, I always think the Throttle Position Sensor. I'd rather call it MAP sensor.


Everytime I hear MAP I think 3rd gen and get confused.

I think BPS is the only one that won't drive us all crazy.
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Postby Maloy » Mon Dec 12, 2005 7:55 pm

The Turbo pressure sensor on the 165 is located on the firewall on the passenger side, somewhat in the corner. It say Turbo Pressure Sensor right on it, you should see it right away.
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Postby SuperWhite92 » Tue Dec 13, 2005 3:33 am

Gary wrote:Like Bryan said, everytime I heard TPS, I always think the Throttle Position Sensor. I'd rather call it MAP sensor.


I'll 3rd the motion.
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Postby epinasty » Sun Feb 05, 2006 2:25 pm

TPS is also used for trottle position sensor.

And the MAP is used a lot for any non turbo s block.
The 5sfe for example doesn't have a maf and just uses the manifold
pressure sensor to know what's going on with intake air flow.
Kind weird how different these very similar engines manage themselves.
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