I know a lot of ppl have this issue, can someone please help me out here,

The car misfires and backfires but from what I have read the backfire is normal, cuz the engine runs rich naturally,

I have changes the spark plugs, coil packs, leads, sensors( e-shaft and MAF), de-cated the car, took the back box off cut it open and put back together.

The car still have power When driving it, the engine idles fine Whn engine is cold and revving at 1500rpm and it warms up and natural reduces the rpm to 750 rpm, it starts to fluctuate again, as if the car is forcing itself to stay on.

Can someone who had similar issue and fixed their car plz help out.

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