RPMs changing noticeably without driver input. Excessive vibrations when stationary and/or Poor engine running at idle and/or surge Hesitation/stall on rapid acceleration “Check engine” or “service engine soon” light is on These lights come on when the engine computer detects some fault in one of the components of the emission control system. Measuring element drift (exceeding the measuring framework).Ī problem with the mass air flow sensor often causes the ”check engine” or ”service engine soon” light in the vehicle instrument panel to illuminate. Mechanical damage (vibrations, accident) and Contact fault at the electrical connections In this case, a replacement becomes the equivalent of a long drain oil service…it almost becomes a service-style repair. For example, with small or compact cars, the MAF sensor can clog quicker, as it is placed in a smaller engine bay subjected to more risk in critical areas (oil vapor flows and combustion debris). The engine harness and mass air flow sensor are both from my NA, i should also say that i drove the car onto a car hauler before the intercooler pipes were made, and in order to do that i had to unplug the mass air flow sensor, and the engine was just sucking in outside air not from the pipes or anything.Contamination could even occur as early as at every 18,000-25,000 miles, depending on the vehicle model. To keep the car alive some feathering of the throttle is necessary to keep the engine alive and even above 3000 rpms it just seems like it wants to come back down and die. When the mass air sensor is plugged in the car struggles to idle and once above 3000 rpms it sounds and runs like it's supposed to, never driven it cause it seems unsafe to. When the mass air flow sensor is unplugged the car will run under 3000 rpms and idle just fine, when it hits 3000 rpms or 30 mph(had to drive back to shop from muffler shop) the car cuts throttle and fuel, but i think that is just because the car is running in limp mode and limiting throttle cause it doesn't know how much air the engine is getting. Hey everyone i'm having a major problem with my 90 na -> tt conversion, the conversion is done and now i'm having idle and bog down issues that seem to be dependent on the mass air flow sensor.

G35 mass air flow sensor problems