2007’ Suzuki SX4 Hesitation Off Idle (Slight Stumble @ Idle) P2-2 

Its like watching a main dealer at work 👍😁.

huge luxury having a spare car for parts swapping I like the mechanical hand👍

Very interesting! I was always under the impression that when the MASS sensor was bad, the fuel trims would get worse at higher RPMs. This proves just the opposite in this case. Maybe the other scenario is when you have a dirty MASS. Thanks for posting this one, it was very informative!

The government expects ordinary people to comply with their emissions regulations, but they'll allow parts to be sold that are out of tolerance by 20%. Its time to start punishing the sellers of garbage. This could have cost some single mother thousands in parts cannon misfires, just trying to pass a atate inspection. At 20-25% of fuel trim, many cars will atart throwing check engine codes. Tenacity is a good word for OCD behavior that leads to success, eventually.

Nice find…I’ve had more and more issues with “quality” name brand aftermarket parts, especially sensors.

How long ago did you install the Delphi MAF? From my experience, aftermarket MAFs are a waste of time, if they work at all out of the box or last any reasonable time, they're a waste of money. I quit using aftermarket sensors years ago. Genuine Bosch, Denso, or Hitachi is the way to go. And I'd avoid purchasing from Amazon or eBay, lots of counterfeit stuff floating around these days.

Both of these cars have the two liter right? I've heard the rule of thumb that the grams per second at warm idle should be just slightly above the displacement in litres. In case you don't have a known good part... or car for comparison! Looks like a Bendin reference 😁

Heres a question; how would you have proceeded if you did not have an identical vehicle available?😉😉