I installed a new Pmag on my injected 320 and notice when I do the mag check at 1700 - 1800 rpm I get nearly 200 rpm drop when running on the Pmag only. I have a Slick on the other side and I get less than 100 rpm drop when running only on that.
Here are the steps I have taken so far:
- Confirmed the wiring
- Reset the timing
- Checked all the plug wires for appropriate resistance.
- Changed the spark plugs (new for new)
- Changed the Pmag unit (I bought two, only installed one)
- Removed the jumper to use the alternate timing curve
The only change I noticed in doing the above was the idle became smoother with the jumper removed, but I still get the ~200 rpm drop.
The Pmag is running the bottom plugs, the Slick is running the top plugs.
What is normal, and should I be concerned?
Here are the steps I have taken so far:
- Confirmed the wiring
- Reset the timing
- Checked all the plug wires for appropriate resistance.
- Changed the spark plugs (new for new)
- Changed the Pmag unit (I bought two, only installed one)
- Removed the jumper to use the alternate timing curve
The only change I noticed in doing the above was the idle became smoother with the jumper removed, but I still get the ~200 rpm drop.
The Pmag is running the bottom plugs, the Slick is running the top plugs.
What is normal, and should I be concerned?