Identifying and Dealing with EMI, searching and searching Options

[McMark]

I would like to spend some serious time doing a qualitative analysis of the EMI that is probably going on in my engine bay. I've been searching Google for some write ups that might help me get started, but everything seems to be quick marketing blurbs for every electronics company on the planet. Does anyone have some links or books or anything that might help me?

Here is how I would like to approach the problem:
1. Evaluate my current situation.
2. Identify the sources.
3. Implement effective corrective measures.
4. Judge the effectiveness of my efforts.

This is probably over the top, but being the son of an engineer makes me think this way. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

So give me your best links and books regarding identifying and dealing with EMI, please.

[DNHunt]

Mark

Don't forget proximity. Move things away from the source. Finding EMI in my car was easy. If I took my DVM anywhere near the coil and spark plug wires it would go nuts. That's no way to quantify it that way but it is graphic. I finally changed to 4 MSD plug wires out of a 5.0l Mustang set and routed them toward the flywheel end of the engine bay. They cleaned up a lot. I moved the coil pack to the right side of the engine bay. The only sensor that breaks up now is the CHT.

I'm not sure if this would help or not but, a lot of MS guys starting out have noise problems in their tach imput signal. Some end up adding a filter with a capacitor and a resistor. You might want to search over there. My tach input is sheilded all the way from the VR sensor to the ECU. As has been mentioned only ground 1 end of the sheild. If the cable goes thru a connector, continue the sheild. I pick a pin and solder the sheild to the matching male and female pins

I had a lot of noise in my MAP signal which made it impossible to tune. I mounted it in the engine bay and had wires running through the tunnel to the ECU in the console. The reference voltage is 5v and the signal can be pretty weak. there was a filter on the board so I added a pot and tuned the resistance to get a clean signal.

Dave