Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
Hmmm, looks like my previous reply didn't stick...
The thing that hits my mind immediately is the air temp sensor connection. Without it, the car runs more rich. Is it possible you broke a wire or connection while removing the air cleaner (assuming you removed it?)?
At idle, the mixture adjustment is on the ECU itself. Under load, the mixture is adjusted at the MAP sensor. When I installed my pertronix, the mileage actually improved ...