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914World.com _ 914World Garage _ TPS replacement

Posted by: falconfp2001 Apr 2 2011, 08:06 PM

I was having problems with the Throttle and my TPS. Way to much slack and the circuit board was grooved.

So I decided to replace.

Here is a a 73 on the left and a 71 on the righ
73 has 5 terminals and the 71 has 4. the 73 also has a different location for the return spring than the 71.

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Posted by: falconfp2001 Apr 2 2011, 08:07 PM

When I popped the covers off you can tell there is a little more thought put into the 73. Technically both switches only use two terminals but which on is the key.

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Posted by: falconfp2001 Apr 2 2011, 08:09 PM

71 now on the left and 73 on the right

Posted by: falconfp2001 Apr 2 2011, 08:11 PM

You can tell that the 73 TPS is more serviceable. I was stunned by how clean it looked.

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Posted by: falconfp2001 Apr 2 2011, 08:16 PM

Here is a shot of the bottom of the 73 TPS. You can see it is numbered according to the schematic. 14 is not used but 9 and 20 are. IF you are using a 4 pin connector from an early FI harness. connect from 9 over and it should be fine.

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Posted by: falconfp2001 Apr 2 2011, 08:19 PM

Heres a shot of the TPS connected. You can make out the numbers from this side as well. Remember, 14 is not used.

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Posted by: falconfp2001 Apr 2 2011, 08:25 PM

Test drive with the 73 TPS was a success. Seems to have more acceleration and definately steady when partial load is on gas.

The Slack in the 73 TPS throttle body shaft and butterfly was almost non-existent.

I was told that the serrations on the boards are different but I surmised that the serrations were for extra pulses during acceleration and not for any value for the ECU.

Operation is smooth and now I'm gonna find me a back up for the future.