Date registered: May 2004
Vehicle: 96 C280, 82 230CE, 80 280SE, 80 300D
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
RE: Is this a hoax?
I've tweaked Bosch fuel injection systems for racing by doing this sort of thing. In open-loop lambda operation the ECU matches enrichment to air supply using air temp as a basic parameter. If you add resistance, say 500 ohms, in series with the intake air temp sensor cicuit it fools the ECU into thinking it needs to provide a richer mixture than it otherwise would provide because it thinks you're driving in denser (cooler) air than you actually are.
The enrichment will typically improve full throttle performance, provide detonation protection, increase emissions and decrease mpg. I wouldn't recommend it unless you are doing some solo I or II racing and reversibly install an inline resistor with connectors on it, or if I were having a real problem with fuel grade and ping on hard acceleration in which case I'd trade off an occasional few seconds of increased emissions for a hole in a piston. DAW