Voltage spikes.
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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.
Voltage spikes.
I've just fitted some new heads and injectors to my Rover V-8, so have been doing some tuning tweaks on MS. It's an MS2 V3 running the latest B&G code. After logging and viewing, I noticed some strange voltage spikes, both above and below the 13.8v norm. Max 21.8v, min 7v. They don't seem to coincide with any abnormal readings elsewhere so do I just ignore them?
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Voltage spikes.
Where is the MS grounded?
Are you running high or low impedance injectors?
Are you running high or low impedance injectors?
Re: Voltage spikes.
Low impedance - the ones as used by the original Lucas injection with resistors. I'm not using the resistors.Matt Cramer wrote:Where is the MS grounded?
Are you running high or low impedance injectors?
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Voltage spikes.
Might want to try using the resistors. This can make for a little less noise.
Re: Voltage spikes.
Just wondering why go to the bother of designing MS to drive low impedance injectors directly if it's just as good to use resistors? I made my new loom excluding the resistor pack. After reading the benefits of driving them directly on this site. 
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Re: Voltage spikes.
I'm seeing the same thing in my Alfa with low impedance injectors. What does "using the injectors" mean? Steps 69 & 70 of the V3 assembly steps? I did both of those and I've got my grounds going to the engine block and set up like the DIYAutoTune article (http://www.DIYAutoTune.com/tech_articles/grounds.html).
Kevin
Kevin
Re: Voltage spikes.
kredden wrote:I'm seeing the same thing in my Alfa with low impedance injectors. What does "using the injectors" mean? Steps 69 & 70 of the V3 assembly steps? I did both of those and I've got my grounds going to the engine block and set up like the DIYAutoTune article (http://www.DIYAutoTune.com/tech_articles/grounds.html).
Kevin
Sorry, meant "using the resisters" not injectors!
Kevin