I haven't really thought of posting this on here tell now since I am currently looking for a noise filtration device and capacitor for a eletrical buffer for electrical equipment I plan on putting in my truck but I was wondering if anyone has ever experienced injector electrical noise in their trucks.

I ask because I have injector noise being passed through my stereo and it's a bit annoying. Maybe a bad ground or just a cheap stereo? Any thoughts? I'd like to fix it and to do so I'm considering putting 2 power distribution rails in the cab of the truck. One that is constant on and the other on a 20 to 35 amp relay that will switch on and off with the vehicle and filtering both with noise filters and/or capacitors. Still trying to figure out how i want to filter and buffer.

 

Just a bump so I may find an answer

 

bump again. Anyone know why the IDM would cause injector noise in my stereo?

 

What kind of stereo do you have? Is it stock? I can't see it from the injectors, you are getting noise interference. I think there is a filter you can install but not a radio guru. I have a stock radio with a tape deck that I would let go really cheap.....Lol.

 

I have installed many car stereos and car security systems. I can tell you that it is not likely that it would be the IDM. Most likely it is a poor connection or improper ground. Is this a factory radio or is it aftermarket? If it is a factory radio there could be many other problems that may cause it. Has it always done this? If it is an aftermarket radio that you or someone else has installed, it is most likely an insufficient ground. Also, if it is an after market radio, you might try pulling the radio and make sure the connections were done properly. Some people just twist and tape stereo connections. I would solder them tape to be sure. If you are running an aftermarket radio with a separate amplifier then you most likely have an improper ground with both units. If you want to be sure of your ground, run a temporary ground wire directly from the negative battery to the radio or amplifer. If the sound goes away you know for certain the problem. Usually a good ground will eliminate all the noise and there would be no need for a filter. If you have a factory radio, then I would start by checking all my harnesses to the radio and verify you have good ground. Also, some people when installing an aftermarket radio, just ground to the first piece of metal they can find under the dash and this is not a good idea. Just because the wire is screwed to metal does not mean you have a good ground.

 

Well it's a aftermarket stereo. The stereo that came with the truck when I purchased it was aftermarket but did not work. I installed the current one and don't know how well it worked before.
There are 2 amps under the center seat and those came with the truck.
When I installed the stereo I crimped the wires together with a decent crimp tool that double crimps everything and doesn't release until it's properly crimped.

I was thinking that the power to the sterio was dirty or the electrical was dirty and it needed to be filtered but I will check the grounds asap. I'll let you guys know what I find.

 

You may want to run a grounding block into your cab and ground the radio and both amps directly to the grounding block. Make sure the wire you use from the radio and especially the amps is of sufficient size. A great big power wire going from the battery to the amp coupled with a little tiny grounding wire will create problems also. They should be close in size. I would check the ground on the radio first because if you are getting noise into your radio, the noise will only be amplified as it goes through your amps.

 

OK, thanks for the info, will do and I'll post back with pics and what have you.
I do plan on taking out the seats soon and pulling the amps up to make sure they are wired correctly plus I plan on putting two power blocks and now a ground block in the cab for accessory power. One will be always on, the other will switch off with the accessories and well the ground speaks for itself, or maybe I should switch it too, lol, joking!
Anyhow, I'll let ya know what I find.

 

Question- I get some odd sounding feedback through the stereo in my truck (aftermarket head unit tied into factory wiring with the proper adapter). I have a Sirius radio installed also, and the wires (both power and antenna) for the Sirius run right along the amplifier boxes for my Isspro gauges. Any thoughts?

 

Problem may be the same, it may be a factory wiring issue. I hate factory wiring, most the time. Try the same, try a different ground, try straight feed to the battery.