Hi,
This is a cross-post from the microsquirt forum -- I thought others on this forum may have some insight into my issue.
My Setup is a 36-1 wheel with a VR sensor on my 1973 Porsche 914. Under cranking, I get 0 rpm and megatune indicates "not cranking."
The controller is a Microsquirt and I am using the built-in VB921s to drive 4 LS2 coils.
My settings are as follows:
Trigger Wheel Teeth = 36
Missing Teeth = 1
Skip Teeth = 18
Delay Teeth = 7 (based on where the sensor is relative to the missing tooth at TDC)
Dual Spark = single crank wheel
I am running Code version 2.90.
I also loaded up the .s19 file and program from http://www.microsquirt.info/tachref.htm and this was my output signal, with the arrow pointing to where the missing tooth passes the sensor. This tells me the wheel, sensor, and wiring are ok.
I'm struggling with how to proceed from here. Any ideas??
thanks!!
Rich
Reading 0 RPM Under Cranking
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.
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.
Reading 0 RPM Under Cranking
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Reading 0 RPM Under Cranking
That's not going to work... LS2 coils are logic level.rwilner wrote:Hi,
This is a cross-post from the microsquirt forum -- I thought others on this forum may have some insight into my issue.
My Setup is a 36-1 wheel with a VR sensor on my 1973 Porsche 914. Under cranking, I get 0 rpm and megatune indicates "not cranking."
The controller is a Microsquirt and I am using the built-in VB921s to drive 4 LS2 coils.
Looks OK to me. Maybe you need to trigger off the other edge?My settings are as follows:
Trigger Wheel Teeth = 36
Missing Teeth = 1
Skip Teeth = 18
Delay Teeth = 7 (based on where the sensor is relative to the missing tooth at TDC)
Dual Spark = single crank wheel
I am running Code version 2.90.
Re: Reading 0 RPM Under Cranking
Matt, if you mean changing from rising edge to falling edge in base ignition options, I tried this and continue to read 0 rpm while cranking.Matt Cramer wrote:
Looks OK to me. Maybe you need to trigger off the other edge?
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lastermann
- MegaSquirt Newbie
- Posts: 1
- Joined: Wed Sep 01, 2010 12:15 am
Re: Reading 0 RPM Under Cranking
First make sure that you've adjusted the pot56 and pot52 on the MSII pcb correctly, then some VR sensors require resistors in line for correct signalling, at last might consider employing signal noise filter, thats how I solved my problem
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DonTZ125
- Experienced Squirter
- Posts: 337
- Joined: Sat May 16, 2009 1:49 pm
- Location: Scarborough, ON
- Contact:
Re: Reading 0 RPM Under Cranking
lastermann wrote:First make sure that you've adjusted the pot56 and pot52 on the MSII pcb
rwilner wrote:This is a cross-post from the microsquirt forum --
The controller is a Microsquirt
