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Hi folks, I have mazda 626 1995 ATX 2.0L 4 Cyl. recently I had issues with Mass Air Flow Sensor so I had to replace it with a new one bought online, I requested it exactly as required specification that matches my car just it's base is little bit different so I had to put some silicon glue to fill the gap, I started engine and check engine light went off, the car goes very smooth and fast but when idle speed goes below 1000 rpm a fluctuation starts to show up and idle speed changes up and down dramatically.
I calibrated Throttle Position Sensor (TPS) so the fluctuation decreased very much, but still there is a fluctuation, I checked spark plugs and their cables, distributor cap, nozzles, feed pump, chock valve, even EGR sensor nothing wrong.
I checked Engine on Key off and Engine on key on nothing wrong and check engine didn't show up.
What is the problem?
Any help will be appreciated
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