Adjustable TPS Sensor?
Thread Starter
Launching!
Joined: Jul 2003
Posts: 258
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From: Rancho Cucamonga, CA
Adjustable TPS Sensor? I was finally able to scan my car with the Torque Pro app, and although my major issue isn't caused by this, I got a fault code that my TPS Sensor voltage is below passing level.
I have a Monoblade throttle body on my speed density car. I saw on rickscamaros.com that they sell an adjustable tps sensor. Is that something I should consider with my setup?
I have a Monoblade throttle body on my speed density car. I saw on rickscamaros.com that they sell an adjustable tps sensor. Is that something I should consider with my setup?
Other than making crappy motors, this is a good read
https://www.golenengineservice.com/d.../Adj%20TPS.pdf
https://www.golenengineservice.com/d.../Adj%20TPS.pdf
Thread Starter
Launching!
Joined: Jul 2003
Posts: 258
Likes: 0
From: Rancho Cucamonga, CA
Wow, I'm a dork. I thought this basically meant that my TPS was bad, not that it could just be an adjustment issue. Where I have a 355 with ported heads and intake and a turbo rather than a 383 where they say this is needed, I'll certainly give this a try today before replacing parts.
Thank you for the info!
Thank you for the info!
Other than making crappy motors, this is a good read
https://www.golenengineservice.com/d.../Adj%20TPS.pdf
https://www.golenengineservice.com/d.../Adj%20TPS.pdf
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
cubic inches is not the factor for the mod. Aftermarket, larger TB's are
The "slotting the TPS holes" method is used in conjunction with opening up the TB blades further to solve idle issues. Opening the blades throws TPS VDC so "clocking" the TPS to then bring its VDC back into spec is what is done.
If your idle is fine and IAC counts are within spec (30-35 at idle) but your TPS VDC are off than yes you can adjust the TPS volts by slotting the holes and rotating the TPS
VDC wants to be about .67 with TB blades closed and 4.5 TB blades full open
The "slotting the TPS holes" method is used in conjunction with opening up the TB blades further to solve idle issues. Opening the blades throws TPS VDC so "clocking" the TPS to then bring its VDC back into spec is what is done.
If your idle is fine and IAC counts are within spec (30-35 at idle) but your TPS VDC are off than yes you can adjust the TPS volts by slotting the holes and rotating the TPS
VDC wants to be about .67 with TB blades closed and 4.5 TB blades full open
Thread Starter
Launching!
Joined: Jul 2003
Posts: 258
Likes: 0
From: Rancho Cucamonga, CA
Great additional info, thank you. Actually, it's been idling like crap, and definitely too low. I just got the Torque app and saw that code among others.
cubic inches is not the factor for the mod. Aftermarket, larger TB's are
The "slotting the TPS holes" method is used in conjunction with opening up the TB blades further to solve idle issues. Opening the blades throws TPS VDC so "clocking" the TPS to then bring its VDC back into spec is what is done.
If your idle is fine and IAC counts are within spec (30-35 at idle) but your TPS VDC are off than yes you can adjust the TPS volts by slotting the holes and rotating the TPS
VDC wants to be about .67 with TB blades closed and 4.5 TB blades full open
The "slotting the TPS holes" method is used in conjunction with opening up the TB blades further to solve idle issues. Opening the blades throws TPS VDC so "clocking" the TPS to then bring its VDC back into spec is what is done.
If your idle is fine and IAC counts are within spec (30-35 at idle) but your TPS VDC are off than yes you can adjust the TPS volts by slotting the holes and rotating the TPS
VDC wants to be about .67 with TB blades closed and 4.5 TB blades full open
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
I assume your car has been tuned for the mono blade. A very common problem on aftermarket TB's is they don't have the idle air passage like stock. No hole between the blades or in the case of the mono, likely none either.
Not sure about speed density tune but what people do to get the car to idle right they crack the blades open some...but this FU the TPS counts so they then "slot" the holes of the TPS to clock it back so VDC reads closer to .67
You need a scan tool to read IAC counts. They want to be 30-35 at idle. IDK if a speed density tune cares about that or not
Not sure about speed density tune but what people do to get the car to idle right they crack the blades open some...but this FU the TPS counts so they then "slot" the holes of the TPS to clock it back so VDC reads closer to .67
You need a scan tool to read IAC counts. They want to be 30-35 at idle. IDK if a speed density tune cares about that or not
Use the scan tool to get the correct TPS reading in voltage (or % but voltage is preferred) and do not splice the wires at the tps using a voltmeter. Also, once you get it idling with the throttle blades opened, turn the car off and set the tps voltage by turning the sensor until you get the correct voltage. Fire the car up and see if it still idles like you want it. If not repeat the above until you get the throttle blades to the correct setting. The reason for this is when you are opening the throttle blades the tps sensor is showing you are giving the car throttle and you need to reset it back to zero. If you do it this way your IAC counts should be where they need to be.
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Thread Starter
Launching!
Joined: Jul 2003
Posts: 258
Likes: 0
From: Rancho Cucamonga, CA
Thanks for the info. I did splice into the TPS wire already as I didn't realize the scan tool will show that. I'll try that as well with the scan tool.
Use the scan tool to get the correct TPS reading in voltage (or % but voltage is preferred) and do not splice the wires at the tps using a voltmeter. Also, once you get it idling with the throttle blades opened, turn the car off and set the tps voltage by turning the sensor until you get the correct voltage. Fire the car up and see if it still idles like you want it. If not repeat the above until you get the throttle blades to the correct setting. The reason for this is when you are opening the throttle blades the tps sensor is showing you are giving the car throttle and you need to reset it back to zero. If you do it this way your IAC counts should be where they need to be.
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Verdad Gallardo Thread Starter
Launching!
Joined: Jul 2003
Posts: 258
Likes: 0
From: Rancho Cucamonga, CA
It was tuned with the monoblade on, but it definitely wasn't setup right. The blades are set all the way closed and the TPS was left stock.
I assume your car has been tuned for the mono blade. A very common problem on aftermarket TB's is they don't have the idle air passage like stock. No hole between the blades or in the case of the mono, likely none either.
Not sure about speed density tune but what people do to get the car to idle right they crack the blades open some...but this FU the TPS counts so they then "slot" the holes of the TPS to clock it back so VDC reads closer to .67
You need a scan tool to read IAC counts. They want to be 30-35 at idle. IDK if a speed density tune cares about that or not
Not sure about speed density tune but what people do to get the car to idle right they crack the blades open some...but this FU the TPS counts so they then "slot" the holes of the TPS to clock it back so VDC reads closer to .67
You need a scan tool to read IAC counts. They want to be 30-35 at idle. IDK if a speed density tune cares about that or not