Am I missing something obvious here? MS Ver. 357 with realay board. Wired it up, starts, runs, but won't shut off unless I disconnect the fuel pump - then it dies a relatively slow death. Once it dies there is no power to the relay board. Checked both constant 12v and switched 12v - works fine. Am I getting feedback from the alternator maybe?
Thanks,
Paul
Engine Won't Shut Off
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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).
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.
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Engine Won't Shut Off
That's possible. It looks like something is still feeding you power on the 12 volt switched wire. Make sure it is losing power when you turn the ignition key off.
Re: Engine Won't Shut Off
Thanks Matt,
I can verify that the switched 12v has no power with ign. switch off engine not running. If I start the engine, turn ign. switch off (engine still running) and then check the switched 12v with a test light - as soon as the test light touches the 12v switched connection on the relay board - the engine shuts down. So I cannot verify power there while switched off and running. I can at least shut the engine off (at least until I mount the relay board out of the way! Any ideas how to trace this?
Thanks again,
Paul
I can verify that the switched 12v has no power with ign. switch off engine not running. If I start the engine, turn ign. switch off (engine still running) and then check the switched 12v with a test light - as soon as the test light touches the 12v switched connection on the relay board - the engine shuts down. So I cannot verify power there while switched off and running. I can at least shut the engine off (at least until I mount the relay board out of the way! Any ideas how to trace this?
Thanks again,
Paul
Re: Engine Won't Shut Off
I have found that if I start the engine and do not rev it up enough to kick in the regulator so that the alternator charges, I can then shut the engine off normally. Once the alternator kicks in, the engine will not shut off. The problem is that I have tried several locations even directly on the ignition switch for the switched 12v and they are all the same. For whatever the reason the alternator is feeding back into this circuit, the feedback is present everywhere on the switched 12v side. I am not an electronics guy so, the question is - is there a circuit I can assemble leading to the 12v switched supply lead that I can assemble that will solve this?
Thanks,
Paul
Thanks,
Paul
Re: Engine Won't Shut Off
Figured it out. I had used one of the connections on the relay board for providing 12v supply to the injectors for the power to the EDIS module. Changed that to switched 12v and that did it!
Paul
Paul