I do get some amount of noise from the fuel pump. I put some bypass
capacitors and an inductor on the power lines going into it. I also bonded
the negative wire straight to the body rather than let it go back to
wherever it goes to get grounded, however doing those things only marginally
decreased the noise. Before i played around with the antenna tuning, that
fuel pump would come on the radio and screech like it was about to be eaten
by a hungry bear.



"Royce Dean" wrote in message
news:beOme.21407$Is4.4591@attbi_s21...
Sounds like the electronic fuel pump, which is back at the tank. I had a
Nissan truck that had the same situation.



"Zombie" wrote in message
...
Hey guys I have a problem with alittle noise from the fuel pump and a
lot
of
noise coming from the ECM on my 95 maxima. I hope someone can help me
out.

Here is the deal: Uniden CB radio. I have a 3' K-40 mounted in the rear
quarter panel. When I switch on the ignition, engine on or not it floods
with noise. I turn off the ignition, after 2 second delay the noise
stops.
If I dont have the antenna connected i get no noise. If the only the
positive connecter of the coax is on the radio then i will still get
noise.
I measured the resistance between the co-ax ground and the radios ground
and
got 90 ohms, between the radio ground's and the negative terminal of the
battery its about 2 or 3 ohms.

The antenna has a solid ground connection to the chassy, and under the
hood
i have a 4 gauge cable bonding the negative terminal directly to the
chassy.
This might make it seem like all the noise is coming from the antenna
side
of things, but if i use my handheld CB on AA battery power there is
virtually no noise picked up. If its powered by the cigarrette lighter
then
noise comes flooding in. This makes it seem like its coming from the
power
source.

I get zero noise from the AM radio in the kenwood CD player, which is on
a
noise filter anyways. I tried connecting the CB to the same power source
and
it didnt help.

Has anyone had a similar problem?