EE Question -- Some Kind of Circuit Interference with AC Clutch Spark Table Switching
#1
Elite Member
Thread Starter
iTrader: (4)
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,301
Total Cats: 696
EE Question -- Some Kind of Circuit Interference with AC Clutch Spark Table Switching
I recently made a software mod to fix my 1st gen MSPNP AC idle once and for all:
https://www.miataturbo.net/megasquir...de-hack-73751/
While I was working on implementing this, I discovered that the MSPNP was not doing spark table switching as expected. When I first installed the MSPNP, I implemented spark table switching and verified operation. At a later date, I also implemented the purge valve solenoid mod. These two circuits looked like this (1J to AC Clutch, 2X to Purge Valve Solenoid):
Long story short, when I removed the purge valve solenoid circuit from 1J, spark table switching began working again. This is OK because with the code hack I don't need the purge valve anymore, but it bothers me that I don't know why there was interference. It looks like it should have worked OK. ??
https://www.miataturbo.net/megasquir...de-hack-73751/
While I was working on implementing this, I discovered that the MSPNP was not doing spark table switching as expected. When I first installed the MSPNP, I implemented spark table switching and verified operation. At a later date, I also implemented the purge valve solenoid mod. These two circuits looked like this (1J to AC Clutch, 2X to Purge Valve Solenoid):
Long story short, when I removed the purge valve solenoid circuit from 1J, spark table switching began working again. This is OK because with the code hack I don't need the purge valve anymore, but it bothers me that I don't know why there was interference. It looks like it should have worked OK. ??
Thread
Thread Starter
Forum
Replies
Last Post
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM
graexodus
Miata parts for sale/trade
5
10-26-2015 01:48 PM