Hi,
I'm getting ready to install a MS-II on my 1986 Nissan Stanza Wagon (aka Prairie/Multi) with the CA20E engine. This 4-cylinder engine has 8 spark plugs and 4 of them are on each side of the engine. From the factory, the spark plug wires nearly touch the fuel injector wires. Is this going to be a concern with Megasquirt? I'm worried about feeding noise back into the ECM. Does anyone else have experience with a setup like this? If so, what did you do to better isolate the two components? Thanks.
Noise Concern
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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.
Noise Concern
1986 Nissan Stanza Wagon 4WD, CA18DET, GT2860RS, 850cc Injectors, Microsquirt, Shuttle XS35GT Carputer
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loren
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Re: Noise Concern
The noise induced from the plug wires to the injector wires would likely be on the millivolt level at its worst. The injector opening signal being 12v, I can't imagine it would be a problem. If it were a problem, better plug wires, and/or shielded injector wires would solve it.
I'm still a relative newb here, but I've never heard of such a problem. I wouldn't worry about it.
Where noise is a factor is with sensitive low-voltage sensors, like VR sensors. In general, I'd say that if an OE application isn't using shielding for it, it's going to be fine.
I'm still a relative newb here, but I've never heard of such a problem. I wouldn't worry about it.
Where noise is a factor is with sensitive low-voltage sensors, like VR sensors. In general, I'd say that if an OE application isn't using shielding for it, it's going to be fine.
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Matt Cramer
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Re: Noise Concern
I have seen problems caused by spark plug wires touching wires leading to the Megasquirt - sometimes you can get a lot more than millivolt level noise. However, the injector wires are the least vulnerable to this sort of problem.
Re: Noise Concern
Thank you guys for your feedback. I will proceed as planned.
1986 Nissan Stanza Wagon 4WD, CA18DET, GT2860RS, 850cc Injectors, Microsquirt, Shuttle XS35GT Carputer