Hey guys I need somebody help! So I recently changed the spark plugs and the wires are in great shape as well, and I changed my original stock mass air flow sensor and changed it to the JET Performance mass air flow sensor. I never touched the ignition coils before and I'm pretty sure I have bad ignition coils because my car doesn't have the power it had before, also when I'm accelerating the RPM's drop a bit the pick back up. If I'm going on a hill, the car doesn't go as fast as before it doesn't increase in power going up a hill. Is it bad ignition coils?

 

If you have never changed the coils, then yes, you need to. Unless you have upgraded the coils to an LS kit (like BHR), then your coils will only last between 20,000 and 30,000 miles. So change them as part of regular maintenance anyway.

If you have been neglecting them, and you have a cat installed still, then chances are you have also slagged your cat, which is causing severe power loss, and can damage the O2 sensors, damage the engine, and eventually start a car fire.



Aside from that, your "performance MAF" is also probably costing you power. The OEM MAF can flow enough for over twice the stock power, and if the MAF you got isn't properly calibrated AND re-scaled in the ECU flash, then it will be fueling incorrectly, and you will be building undesireably fuel trims as the ECU is desperately trying to save your engine. Put the stock MAF back in unless you know it actually failed (stock MAF failure is VERY rare on the RX-8), in which case get another OEM MAF.

 

+1

Just as an FYI RIWWP ... I had one fail if you're keeping count somewhere.

 

Not a count, just a frequency based thing. I remember seeing a few, but only a bare handful in ~6-7 years? I don't think there is a single part immune to failing