TPS signal goes away when car starts

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1983sc
MegaSquirt Newbie
Posts: 7
Joined: Mon Nov 26, 2007 7:17 pm

TPS signal goes away when car starts

Post by 1983sc »

I'm running MS 2, version 2.2. I can calibrate my Ford TPS with MegaTune and get zero to full scale readings until I start the engine. Than the signal goes to zero. Any ideas?
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trakkies
Super Squirter
Posts: 1162
Joined: Tue Dec 30, 2008 3:06 am
Location: SW London, UK

Re: TPS signal goes away when car starts

Post by trakkies »

1983sc wrote:I'm running MS 2, version 2.2. I can calibrate my Ford TPS with MegaTune and get zero to full scale readings until I start the engine. Than the signal goes to zero. Any ideas?
Just some thoughts. How is it grounded? Have you checked the 5 volt supply to it with the engine running? And the output voltage from it?
Dave P, London UK.
Rover V-8
MSII V3
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