Engine bogging down with any swift throttle change

[Pete_89T2]

Originally Posted by RETed

I dunno if Mazda still carries those pills, but I didn't bother with them.

The pill is to keep spikes from getting to the boost sensor, so the stock ECU doesn't trigger the over-boost fuel-cut unnecessarily.
If you have an FCD (or some way to defeat the over-boost fuel-cut), then this is not really necessary.


-Ted

I disagree with removing the restrictor pill from the MAP sensor line. If you do, a side effect is it will cause the MAP sensor to produce a "noisy" signal even at idle, which can effect your ability to tune the car. I have an Rtek 2.x modified N370 stock ECU, and when I was having Dave B. at Speed1 tune it for me, he initially had problems trying to determine my baseline on the 1st few dyno pulls. He noticed the MAP figures showing up in the Rtek logs were all over the place. Then Dave figured out I was missing the restrictor pill, popped a spare one he had into the MAP sensor line and all was good from there - MAP readings in the log were no longer noisy, and he was able to get a consistent tune from that point on.

BTW, you can usually find generic restrictor pills for 1/8" hose at Advance auto parts or Autozone.