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So I tried to go cheaper and get an eBay cold air intake. Had the MAF connected and plugged in. The air plugged in but after like 30 seconds of starting the car it bogs down and dies. Reinstalled the oem air box and it had no issue. Anyone have a work around to this?
A GK, I assume? The MAF sensor needs to be installed in a tube that's the exact same size as the stock tube.
The MAF measures air velocity (specifically, how much a sensing element gets cooled by the air flowing over it). The sensing element covers one tiny spot in the intake tube, so its air velocity measurement gets multiplied by the area of the MAF tube (if you cut the tube square and measured the circle) to get volume-flow. Toss in barometric pressure and temperature measurements (how dense the air is) to get mass-flow, which is what the PCM needs to decide how much fuel to add to the air that the engine is pulling in.
A bigger MAF tube has more area, which means slower air velocity (smaller MAF sensor value) for a given actual-flow-rate. The PCM doesn't know the tube has been replaced - it just sees a smaller-than-normal value from the MAF sensor, but not enough to immediately throw an error code. As soon as the PCM finishes its start-up routine, it switches over to relying on the MAF sensor when calculating how much fuel to inject. The smaller-than-normal-MAF-value gets processed into less fuel injected into the cylinder, but the actual air flow hasn't changed. Less fuel in the same-old amount of air results in a lean air/fuel mixture. The bigger the MAF tube, the leaner the air/fuel mix.
As stated…. We will need mire details on the kit you bought….. i went the “cheap” route too but i tried to replicate positioning and sizing from the MAF up to the throttle….
i bought a 63mm aluminium MAF adapter and a 90degree 63mm to 70mm silicone elbow (The 70mm side going to the honda CR-V throttle body)
