 Throttle position switch, info needed 2.0 vs. 1.8 |
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| crash914 |
 Jul 2 2003, 09:17 AM
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#1
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its a mystery to me  Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region  |
As I am looking into the megasquirt system to replace the D-jet on my '73 2.0.
Does anyone know if the 1.8 L-jet throttle position switch is a potentiometer or is it just like the 2.0 with step traces..Thanks for info...herb (IMG:style_emoticons/default/wacko.gif) |
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Replies(1 - 3)
| tryan |
Jul 2 2003, 09:52 AM
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#2
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Senior Member Group: Members Posts: 553 Joined: 22-January 03 From: smokey mountains gatlinburg tn Member No.: 184 |
see if the part # are the same. is the tps used for mixture adjustment/enrichment purposes? you might want to ask some megasquirt guys what you are trying to achieve.
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| Dave_Darling |
Jul 2 2003, 10:52 AM
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#3
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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The 1.8 is just a switch as well. It has idle contacts, and (I think?) WOT contacts. Nothing in the middle. Not a potentiometer...
--DD |
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| DNHunt |
Jul 2 2003, 12:31 PM
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#4
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Crash
You need a TPS that has these qualities 1) potentiometer as you know 2) 8mm D shaft 3) turns counterclockwise 4) rotates far enough so that it doesn't provide a stop for the throttle. There aren't many that satisfy all these criteria. There is an aftermarket TPS that is reversible so it will turn either way (I think Mike Mueller used this). Do a search on the Megasquirt site as I remember there was a group buy of these a while back. My solution was to use a Subaru TPS off of an Impreza throttle body. It met all of the criteria except #3 ( it turns the wrong way ). Actually that is no problem if you drill a 3/8" hole in the outside of the case then mount it to the metal back plate with machine screws. I covered the original openning for the D shaft with a rubber cap I got at the hardware store. Not beautiful but cheap and elegant in it's simplicity. By the way when you get parts at the junkyard always grab the electrical connectors. Here's a pic of my setup. Attached image(s) 
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