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Old 05-22-2022, 11:44 PM   #1 (permalink)
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Adding a capacitor to the TPS to improve mpg

I read a post recently on that social media site that referred to adding a 22-25mfd capacitor between the sensor ground and signal of the TPS sensor of a Saturn like mine.

The logic is sound. Essentially you are delivering a smaller acceleration pump shot (carb terminology) by dampening the signal to the pcm electronically. Also supposed to filter out foot jitter.

But my question to those of you more electronically savvy than me is would this make for any measurable difference in ultimate fuel consumption?

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Old 05-23-2022, 02:40 AM   #2 (permalink)
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This was a mod a few years back in the Insight community. Some swore by it. I installed it and it made the car feel just a bit lazy to respond to inputs, and I couldn't measure any difference over a few months, so I pulled it.

I imagine on any cable throttle vehicle, it's really just affecting tip-in fuel. Or, in other words, with this mod it's going lean when you get on the gas, and going rich when you get off.
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Old 05-23-2022, 01:17 PM   #3 (permalink)
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Yeah, I don't know how making a sensor less sensitive is supposed to improve anything.

Maybe if someone has a jittery foot it could help something? Still don't think it would affect MPG in any measurable way.
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Old 05-23-2022, 09:33 PM   #4 (permalink)
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Seems dubious, because the tip in enrichment will at most overshoot stoichiometric by a little bit for a tiny fraction of a second.
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Old 06-01-2022, 06:37 AM   #5 (permalink)
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You really need a flux capacitor and even then it only really helps at speeds over 88 mph.

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Old 06-02-2022, 01:35 AM   #6 (permalink)
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Originally Posted by serialk11r View Post
Seems dubious
And potentially dangerous too.

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