Megasquirt Continuous trigger of leading coil
#1
Bare Metal Racing
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: St. Louis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
Continuous trigger of leading coil
I seem to have a problem where my leading coils are being triggered continuously. At first I thought I had a problem with noise on the leading coil trigger lead going into the igniter so I rerouted it away from everything that could have been inducing the noise without any change. I have an MSD 6 installed and as soon as I turn on the ignition it starts firing and continues as long as I leave the ignition on.
To start troubleshooting I disconnected the CAS leads going into the MS2 to make sure there wasn't something feeding in on those leads even though they are shielded. No change. I do have the DIY relay board between the engine and the MS2. I have double checked the wiring of the MSD 6, I even dropped in a stock coil and igniter and took out the MSD 6 and still see the same thing.
Any thoughts on where I should start looking?
To start troubleshooting I disconnected the CAS leads going into the MS2 to make sure there wasn't something feeding in on those leads even though they are shielded. No change. I do have the DIY relay board between the engine and the MS2. I have double checked the wiring of the MSD 6, I even dropped in a stock coil and igniter and took out the MSD 6 and still see the same thing.
Any thoughts on where I should start looking?
#3
Bare Metal Racing
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: St. Louis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
I will try to reflash this evening and see if that does any good, I never thought to try that.
Thanks.
#4
Senior Member
iTrader: (1)
Join Date: Jul 2005
Location: chicago
Posts: 360
Likes: 0
Received 0 Likes
on
0 Posts
I don't know if it might help any but try changing out the transistor behind D14on the V3 mainboard. I think it's a 2N2222 or a 2N3904 NPN transistor. When I was having problems with my leading trigger I found that to be my problem.
#5
Bare Metal Racing
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: St. Louis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
Thanks, I think I even have a couple of those on hand. If not they are common enough that Radio Shack should have one or the other. Worst case there are a couple of good electronics supply shops not to far away.
Trending Topics
#9
Bare Metal Racing
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: St. Louis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
Thanks again to everyone for your advice.
#11
Bare Metal Racing
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: St. Louis
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
You may have hit the problem. I will know tomorrow if that is the only problem but the transistor had a short base to collector. I should finally have time to get it replaced tomorrow. I'll post the results after I get it done and tested.
Thread
Thread Starter
Forum
Replies
Last Post
windom
Adaptronic Engine Mgmt - AUS
4
09-11-15 04:48 AM