G force chip
Junior Member
Joined: Aug 2012
Posts: 11
From: Vladivostok
BEWARE other "Performance Chips" that connect to the IAT...
How IAT "chips" damage your vehicle:
The majority of so-called "Performance Chips" on eBay are simple 1� resistors, often presented in a fancy box, sometimes with a switch or **** hanging off one side. They ALWAYS connect to the IAT and disable its functionality, and WILL damage your engine. The fact that these chips claim gains of 50, 80, even up to 100HP (better than most forced induction conversions) for a mere $20 or so is simply absurd.
While you may notice your car drives differently without a functioning IAT, it is certainly NOT running better.
The IAT is an important sensor in your vehicle's fuel injection system. The ECU depends on it to measure the temperature of air coming into the engine. Cold air requires more fuel for a richer mixture due to the density, and because fuel does not vaporize well in cold air. The IAT "chip" is simply a resistor with a value equal to that of the IAT's output on a cold day. This fools the ECU into delivering excess fuel during normal driving. Now there is not enough air for an ideal 14.7:1 stoichometric air/fuel ratio. The engine runs rich, fuel goes unburned, and is passed through the exhaust. Not only does this drastically decrease gas mileage (contrary to claims of improved economy), it also causes the catalytic converter to operate less efficiently resulting in excess CO2 and an emissions fail. When driven for extended periods, permanent damage to the O2 sensor ($150) and catalytic converter ($400+) will occur. On newer vehicles, disabling the IAT with a resistor will trigger a Check Engine light as well as void most warranties. The IAT is there for a reason!
How IAT "chips" damage your vehicle:
The majority of so-called "Performance Chips" on eBay are simple 1� resistors, often presented in a fancy box, sometimes with a switch or **** hanging off one side. They ALWAYS connect to the IAT and disable its functionality, and WILL damage your engine. The fact that these chips claim gains of 50, 80, even up to 100HP (better than most forced induction conversions) for a mere $20 or so is simply absurd.
While you may notice your car drives differently without a functioning IAT, it is certainly NOT running better.
The IAT is an important sensor in your vehicle's fuel injection system. The ECU depends on it to measure the temperature of air coming into the engine. Cold air requires more fuel for a richer mixture due to the density, and because fuel does not vaporize well in cold air. The IAT "chip" is simply a resistor with a value equal to that of the IAT's output on a cold day. This fools the ECU into delivering excess fuel during normal driving. Now there is not enough air for an ideal 14.7:1 stoichometric air/fuel ratio. The engine runs rich, fuel goes unburned, and is passed through the exhaust. Not only does this drastically decrease gas mileage (contrary to claims of improved economy), it also causes the catalytic converter to operate less efficiently resulting in excess CO2 and an emissions fail. When driven for extended periods, permanent damage to the O2 sensor ($150) and catalytic converter ($400+) will occur. On newer vehicles, disabling the IAT with a resistor will trigger a Check Engine light as well as void most warranties. The IAT is there for a reason!
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07HummerH3
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Apr 4, 2007 11:57 PM
chsnprodigy
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Mar 21, 2007 12:35 PM
05, auto, catalytic, chip, connect, convereters, converters, damage, experienced, force, gforce, h2, hummer, programmer, rich, running
