Injectors staying open and blowing fuses
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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.
Injectors staying open and blowing fuses
so i have this on an 81 jeep with the 6 cyl and TBI. i had it running at one point and then had to replace injectors and other parts. trying to start it tonight i am blowing 5 amp fuses in the relay board. when i install a 7.5 the injector stays open all the time. even when the the ignition is off i am getting some dripping out of the injector. when i unplug the injector power wire the injector closes off and does not drip. any ideas? this is an MS1
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Injectors staying open and blowing fuses
What main board version is it - V2.2, V3.0/V3.57? If it's a V2.2, do you have a flyback board?
Re: Injectors staying open and blowing fuses
Yes it does have a flyback board. Didn't have one before, but Peter Florance installed one. is it possible to burn the flyback board up? I had to install a new starter solenoid and the power cable was flickering on and off due to a bad connection.
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Injectors staying open and blowing fuses
It's not impossible. Can you test the injector output circuit on a Stim? What happens then?
Re: Injectors staying open and blowing fuses
So i dont have a stim to test with. What i have been doing is testing the FET's on Q2 and Q7 and they are reading 1ohm resistance. I then cheked the same thing on the flyback and they are all testing at 1 ohm as well. i am going to remove the wires from inj1 and inj2 from flyback board and retest