Howdy Boys & Girls:
My supercharged NSX has been running great for years. 2000 miles ago I had an ESM (Electronic Signal Modifer) put in. This device goes between the MAP sensor and the ECU to make sure the ECU does NOT see a MAP sensor voltage that's out of the normal range when running a SC.
I'm cruising on the freeway and the Check Engine and TCS lights come on. I pull off at the next convenient point and the car is constantly hunting for idle (between 200 and 1800 RPM). It will also not rev above 4000 RPM. If I try to accelerate past 4K RPM, TCS closes the throttle. After that it went through a 1/4 tank of gas in about 30 miles and smelled like raw gas coming out of the tailpipes. It was running Bill Gates rich.
After much trouble shooting of the OEM equipment and wiring, it turns out the ESM went bad resulting in the ECU seeing abnormal MAP sensor voltage.
Had the new ESM put in and the car runs like a supercharged top (again). TCS being activated is apparently just to protect the engine. ESM was good-willed.
My supercharged NSX has been running great for years. 2000 miles ago I had an ESM (Electronic Signal Modifer) put in. This device goes between the MAP sensor and the ECU to make sure the ECU does NOT see a MAP sensor voltage that's out of the normal range when running a SC.
I'm cruising on the freeway and the Check Engine and TCS lights come on. I pull off at the next convenient point and the car is constantly hunting for idle (between 200 and 1800 RPM). It will also not rev above 4000 RPM. If I try to accelerate past 4K RPM, TCS closes the throttle. After that it went through a 1/4 tank of gas in about 30 miles and smelled like raw gas coming out of the tailpipes. It was running Bill Gates rich.
After much trouble shooting of the OEM equipment and wiring, it turns out the ESM went bad resulting in the ECU seeing abnormal MAP sensor voltage.
Had the new ESM put in and the car runs like a supercharged top (again). TCS being activated is apparently just to protect the engine. ESM was good-willed.
