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post #54 of (permalink) Old 27th September 2008
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Originally Posted by madnoel10 View Post
Quite a number of the so-called plug-in chips are actually only a resistor that fools the ECU into thinking the engine is cooler than it actually is and increases the amount of fuel injected into the engine. As they don't seem to increase the amount of air proportionally the engine only runs that bit richer. It might improve acceleration but it is also likely to increase fuel consumption with poorer mpg. When fitted to some of the renault engines it can cause a fuel fault problem to be logged - yeh the dreaded warning light comes up. You also have to remember the Lamda sensor may counteract any beneficial effect if it detects the exhaust gases are incorrect.
Noel when you say the warning ight comes on this is the system warning that there has been a disconnection/fault in the system but not necessarily be causing a problem right?
Also any thought to my question about the mod chip and running in lpg mode (I believe the lpg has it OWN ECU for the amount of gas it lets in when in lpg mode) and whether performance will increase by letting more gas through BECAUSE the IAT has been modified?
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