Hi, I have a problem with my injections signals. I use Magasquirt II V3 and I assembled it myself. I asjusted all parameters for high impedence injectors and I only get 2.10 V on the injectors signals . I also tried to set it like low impedence and it give me a 3.20V signal. So, i checked everything on the board and it seem fine. So now I don't know what to do to found the problem. If you need more informations feel free to ask.
Thank you
Low voltage injections signals problem
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).
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.
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.
-
Jo_Tercel99
- MegaSquirt Newbie
- Posts: 11
- Joined: Thu Nov 20, 2008 10:07 am
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Low voltage injections signals problem
Remember that the MS supplies ground to the injectors, not power. Given how fast the injectors switch on and off, it's near impossible to catch the voltage correctly with a volt meter, requiring an oscilloscope instead. Do the injector LEDs work on a Stim?
-
Jo_Tercel99
- MegaSquirt Newbie
- Posts: 11
- Joined: Thu Nov 20, 2008 10:07 am
Re: Low voltage injections signals problem
Oh yes thats right, so my problem is maybe somewhere else.
Yes everything seems well the LED are flashing, I don't have any problem anywhere esle but when I tried to start the car with Megasquirt it was like it was'nt injecting fuel. The fuel system is alright because I run the car every days with the stock ECU.
Yes everything seems well the LED are flashing, I don't have any problem anywhere esle but when I tried to start the car with Megasquirt it was like it was'nt injecting fuel. The fuel system is alright because I run the car every days with the stock ECU.
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Low voltage injections signals problem
Chances are you need to adjust the cranking pulse. But first make sure the MS is seeing RPM, since no RPM means no fuel.
-
Jo_Tercel99
- MegaSquirt Newbie
- Posts: 11
- Joined: Thu Nov 20, 2008 10:07 am
Re: Low voltage injections signals problem
Yes I get a RPM and I tried some différent Cranking pusle and it did'nt change anything, the car didn't start, so I checked at the exhaust to see if I could smell fuel but it didn't.
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Low voltage injections signals problem
Check the plugs and see if they are soaked with fuel. If not, add more cranking pulse width at the temperature you're at.