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What Is This?!

TurboDoseBro

By TurboDoseBro,
in General Automotive Discussion

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Truffles Community Regular

Truffles

Posted
Posted
would change AFRs aka just dump in more fuel making the car richer.

that's that i would guess for $12.

Exactly. Tricks the car into thinking it's colder, therefore dumping more fuel into the engine. Will it work? Marginally. Is it terrible for your engine? Well...

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zebra Grand Master

zebra

Posted
Posted

It changes the signal for the coolant temp sensor not the air temp.

But yeah...cant see it doing anything other than washing all the oil off the bores and ass raping your engine with a pineapple attached to a jousting stick.

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mad082 Grand Master

mad082

Posted
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It will modify any standard ECU by telling the ECU that the incoming air in the intake system is cold

description makes it sound like it's for a air intake temp sensor.

you could essentially just unplug your coolant temp sensor though. will have the same effect. the thing is though, on long trips it may really affect fuel economy if the resisitor in the little box (that's all they are) made the ecu think the engine temp was so low that it ignored the o2 sensor and just ran on the cold start enrichment maps.

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MBS206 Grand Master

MBS206

Posted
Posted
also won't work on rb20 or rb25 powered cars as they don't have an intake air temp sensor.

i'd also like to know how adding in more fuel (which they say happens in the explanation) equals better fuel economy, lol

I knocked my temp sensor off one day to the ECU, car wasn't too happy about it once warmed up.

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Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

It could and has worked before.. you just gotta know what it actually tries to do so you don't expect too much.

Generally these resistor/chip/box mods will tap into the coolant temp sensor and lower/raise the resistance value fed into the ecu (depending on the type of sensor you have - some go higher when hotter whereas some go lower when hotter), then once the ecu picks up that the car is supposedly running in a cool environment, it will advance the ignition timing to suit equaling more power.

The main thing it depends on is your OEM ecu having ignition timing advance for colder situations - if the ecu has that and you install this crap correctly, then it will work to an extent.. much like driving some bog stock normal car in 10degree night weather vs a hot summer day (taking into account the air is less o2 rich during your testing the device vs driving during a really cold night and also heatsoak).

You can potentially save fuel by having to be on the gas a little less going up hills or maintaining speed etc as your car will have slightly more torque so you do not need to depress the throttle as much as before the 'mod'.

Long as you have basic electronics understanding, how car systems/ecu works etc, you can do this for a couple of bucks (buy a pot to see which resistance value gives best results then buy a simple resistor in that value).

While it may seem like i'm giving this a good rep.. nope not at all (not saying it won't work either because done right it will as long as your ecu has timing advance for colder running situations, a coolant temp sensor and a conservative factory tune). But it's sometimes nice to know the theory behind things.

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mad082 Grand Master

mad082

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Posted

most ecu's add more fuel when cold, as well as possibly adding more timing, so when at full throttle you will use more fuel, and when cruising you may simply use the same amount of fuel. all in all though, you would normally see worse fuel economy with something like this. i've had cars with dodgy thermostats making the car run cooler and fuel economy was better once the thermostat was replaced.

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