MSII with coil

This forum is for discussing ignition setup, tuning, and troubleshooting for MS-II. Click these links for info on GM's HEI, EDIS, direct coil control, others.
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.

If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.

If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days

The full forum rules are here: Forum Rules, be sure to read them all regularly.
Post Reply
nk920605
MegaSquirt Newbie
Posts: 4
Joined: Mon Nov 09, 2009 6:36 am

MSII with coil

Post by nk920605 »

:cry: I'am finally check out all "breakdown point" ,so I got some question in this picture,between the "MSII"and the "Bosch-124"
:RTFM: But,I stuck on this process,How to elimination the "breakdown point".
Question:The coil voltage should between "12V-0V" to charge and discharge,However,the coil voltage keep 12V forever.......
MSII's Version:2357-C
Megasquirt-2ECU
PCB V3.57


Bosch-124's diagram
Image

Right
Image

Wrong
Image
Top
trakkies
Super Squirter
Posts: 1162
Joined: Tue Dec 30, 2008 3:06 am
Location: SW London, UK

Re: MSII with coil

Post by trakkies »

On a scope, the coil negative should switch from +12v to approx 0v when the sensor causes the ignition ECU to switch. More of less like points do. If it's not switching with the engine turning, likely a faulty sensor or ignition ECU.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Top
Post Reply

Return to “MS-II Ignition Setup, Tuning, and Troubleshooting”