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Old 06-26-2020, 09:25 AM   #21 (permalink)
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Join Date: Jun 2010
Location: Edinburg, VA
Posts: 74

The Little Car - '00 Chevrolet Metro
90 day: 91.08 mpg (US)

The Big Car - '94 Chevrolet Caprice Wagon
90 day: 44.9 mpg (US)
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Quote:
Originally Posted by Gasoline Fumes View Post
What about modifying the TPS and/or MAP signals to hide the true load from the ECU?
Interesting idea! I'm pretty sure that on the Metro the closed/open loop threshold, once operating conditions for closed loop are met, is based 100% on TPS position vs. RPM (as it is on the Caprice and other ECUs that I'm familiar with). So, it's very likely that the only signal that would need modification is the TPS signal.

The question is: how would so doing affect the engine's operation in other ways?

Ultimately, it would be more about convenience than necessity. It is possible to keep it in closed loop at high load--you just have to be very careful about throttling.

-Funkhoss

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Old 07-02-2020, 09:31 AM   #22 (permalink)
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Join Date: Dec 2011
Location: northen Illinois
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mind blowing mileage!
I see you run non-ethanol gas also. That pushed my car over the hump for gas mileage. My ecu has no aftermarket support so software hacks are out. I want to explore some sensor mods but don't want to push advance to the point of cracking the head or burning the valves.
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Old 07-15-2020, 05:05 AM   #23 (permalink)
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Join Date: Jul 2020
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Quote:
Originally Posted by funkhoss View Post
Interesting idea! I'm pretty sure that on the Metro the closed/open loop threshold, once operating conditions for closed loop are met, is based 100% on TPS position vs. RPM (as it is on the Caprice and other ECUs that I'm familiar with). So, it's very likely that the only signal that would need modification is the TPS signal.

The question is: how would so doing affect the engine's operation in other ways?

Ultimately, it would be more about convenience than necessity. It is possible to keep it in closed loop at high load--you just have to be very careful about throttling.

-Funkhoss
Some engines run without any enrichment, for example the Toyota Prius, or an old Mercedes M119/120 - engine from a certain year on. Issues? Obviously none. I think, this enrichment occurs often too early or too strong. A few years ago, I saw a german examination about exhaust pollutant of modern cars. It shows, that cheaper cars tends to enrich the fuel / air mixture way earlier than expensive cars. I guess, itīs just cheaper, to just enrich it, unstead to estimate, on which rpm or load this enrichment is really necessary.
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Old 11-11-2020, 10:39 AM   #24 (permalink)
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Join Date: Dec 2010
Location: Arkansas
Posts: 812

Sport Utility Prius - '10 Toyota Prius II
90 day: 59.63 mpg (US)

The Smoke Bomb - '96 Ford Ranger
90 day: 25.97 mpg (US)

CB 750 - '00 Honda CB750 Nighthawk
90 day: 37.35 mpg (US)

Killer 650 - '07 Kawasaki KLR650
90 day: 45.83 mpg (US)

Big Booty White Girl - '04 Toyota Sequoia Limited
Thanks: 237
Thanked 176 Times in 138 Posts
Quote:
Originally Posted by funkhoss View Post
I've attached a pic of the car that I took this morning.

-Llumar Air 80 "clear" window tint (for interior heat reduction)

-Funkhoss
Funk,

Can you buy this tint for self install? I have 3m Crystalline but its a racket. They will only sell to dealers who want an arm and a leg to install it and they are few and far between.
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Old 11-11-2020, 10:53 AM   #25 (permalink)
EcoModding Lurker
 
Join Date: Jun 2010
Location: Edinburg, VA
Posts: 74

The Little Car - '00 Chevrolet Metro
90 day: 91.08 mpg (US)

The Big Car - '94 Chevrolet Caprice Wagon
90 day: 44.9 mpg (US)
Thanks: 10
Thanked 132 Times in 34 Posts
Quote:
Originally Posted by hayden55 View Post
Funk,

Can you buy this tint for self install? I have 3m Crystalline but its a racket. They will only sell to dealers who want an arm and a leg to install it and they are few and far between.
That I do not know, unfortunately. I had someone local to me, whose labor charges were quite reasonable, install it on both of our cars.

I can say that it does seem to work, though!

-Funkhoss
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Old 11-11-2020, 06:08 PM   #26 (permalink)
Master EcoModder
 
Join Date: Dec 2010
Location: Arkansas
Posts: 812

Sport Utility Prius - '10 Toyota Prius II
90 day: 59.63 mpg (US)

The Smoke Bomb - '96 Ford Ranger
90 day: 25.97 mpg (US)

CB 750 - '00 Honda CB750 Nighthawk
90 day: 37.35 mpg (US)

Killer 650 - '07 Kawasaki KLR650
90 day: 45.83 mpg (US)

Big Booty White Girl - '04 Toyota Sequoia Limited
Thanks: 237
Thanked 176 Times in 138 Posts
Quote:
Originally Posted by funkhoss View Post
That I do not know, unfortunately. I had someone local to me, whose labor charges were quite reasonable, install it on both of our cars.

I can say that it does seem to work, though!

-Funkhoss
I'm a huge fan of that style of tint as well. It makes a crazy difference.

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