Throttle position Sensor close to header

[Markus]

<FONT color=black><FONT size=3>Hello guys,

I'm having trouble with my injection system, while hunting down potential issues I saw on my laptop that the voltage of my throttle position sensor is changing with temperature of the engine. Yes, afterwards it does not make sense to have electrical components or fuel line that close to the exhaust system…..

These changes come into my mind to fix the issue:
· <SPAN lang=EN-US style='FONT-SIZE: 10pt; FONT-FAMILY: "Verdana","sans-serif"; COLOR: black; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-fareast-language: DE; mso-ansi-language: EN-US'>Changing the setup (TPS to the front) <?xml:namespace prefix = "o" ns = "urn:schemas-microsoft-com

· Adding a turkey pan / heat shield
· Heat insulation of TPS and fuel line


What is your opinion/experience? Do you have some examples for heat insulation to make a quick fix??

I would be thankful when you share some Information/pictures.

I found one other thread where the topic was discussed but Keith did not follow up on changes he might have done. <o></o>
http://www.gt40s.com/forum/gt40-build-logs/34367-keith-bakers-southern-gt-build-10.html<o></o>
I contacted Keith but did not get an answer so far.<o></o>
Thanks in advance for helping me out.

<o></o>
Cheers
Markus<o></o>
</P>

 

[PeteB]

You might try using some header wrap (DEI Product List | Exhaust Header Wrap and Thermal Performance Products | Design Engineering, Inc.) on the two header pipes closest to the TPS. It would be an easily removable way to find out if heat shielding would fix the problem.

 

[Terry Oxandale]

My assumption is that the cable has a slight dead-band (slack) in it that allows mounting components, engine, etc to expand with heat without actually tightening the cable and thus changing the TPS position.

 

[Dwight]

change you move the TB / TPS from the 7/8 position to the 1/2?

Dwight

 

[Bill Musarra]

Consider flipping the throttle bodies so that the sensor is in the front on the right hand side. that is how mine is set up. Then there are no worries.

Bill

 

[Markus]

Quick and dirty solution

First thanks for your idea's - flipping the throttle body is a bigger (winter)project.

To have a quick fix I made heat shield out of Koolmat (KoolMat Hi-Tech Heat Insulation).

Will see if this changes something....

 

[Markus]

Short Feedback.

The heat insulation obviously helped.

After driving today the TPS voltage stayed exactly the same (low setpoint).

Markus