Help - changed my plugs now H2 runs like @#$%

[dna]

Checked the maf plug and it was fine. Still have the issue. I guess it could be a coincidence and my maf sensor has gone bad. Is there a way to test the sensor?

Otherwise if maf is good and maf plug well connected, any other ideas?

Could it be my cat. I have one that is going bad. Been looking for a replacement for a few weeks now. Though prior to the plug swap, only issue I had was rattlin (no codes). Maybe with the new plugs and wires, with the extra power it was enough to fully plug my cat. Heard that a plugged cat will give p0300 codes - though would that also give the maf code?

Thanks

[glennf1]

MAF itself could be bad or the wiring from it going to the computer. My only other guess would be a forward O2 sensor. If your cat was bad the rear O2 would catch it and that's only for emissions anyway, the forward O2 is for Air/Fuel. The codes are your friend.. it would not have thrown a MAF sensor code unless it was out of range or not receiving feedback from it. Unplug your MAF sensor and drive it. If there is no difference I would replace it.