Dodge Stealth 1994 - There Is Noise When Starting the Engine

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CHASSIS ELECTRICAL - Radio and Tape Player 8-381
A-6 There is noise when starting the engine.
Noise type
Sounds are in
parentheses ( ).
AM, FM:
Ignition noise
(Popping, Snapping,
Cracking, Buzzing)
Other electrical
components
Static electricity
(Cracking,
Crinkling)
Conditions
l Increasing the engine speed
causing the popping sound to
speed up, and volume decreases.
l Disappears when the ignition
switch is turned to ACC.
l Disappears when the vehicle is
completely stopped.
l Severe when the clutch is
engaged.
l Various noises are produced
depending on the body part of
the vehicle.
Cause
l Mainly due to the
spark plugs.
l Due to the engine
noise.
Noise may appear as
electrical components
become older.
Occurs when parts or
wiring move for some
reason and contact
metal parts of the body.
Due to detachment from
the body of the front
hood, bumpers, exhaust
pipe and muffler,
suspension, etc.
Caution
1. Connecting a high tension cable to the noise
filter may destroy the noise filter and should
never be done.
2. Check that there is no external noise. Since
failure to do this may result in misdiagnosis
due to inability to identify the noise source,
this operation must be performed.
3. Noise prevention should be performed by
suppressing strong sources of noise step by
step.
NOTE
1. Condenser
The condenser does not pass D.C. current, but
as the number of waves increases when it
passes A.C. current, impedance (resistance
2.
L
Inspection or replacement (
Noise-
preventive
pan
(next page)
l Noise filter
l Ground
2, z, 4
cable
l Noise
1, 2
condenser
Repair or replace electric-
al components.
Return parts or wiring to
their proper position.
Ground parts by bonding.
Cases where the problem
is not eliminated by a single
response to one area are
common, due to several
body parts being imper-
fectly grounded.
against A.C.) decreases, and current flow is
facilitated. A noise suppressing condenser
which takes advantage of this property is in-
serted between the power line for the noise
source and the ground. This suppresses noise
by grounding the noise component (A.C. or
pulse signal) to the body of the vehicle.
Coil
The coil passes D.C. current, but impedance
rises as the number of waves increases relative
to the A.C. current. A noise suppressing coil
which takes advantage of this property is in-
serted into the power line for the noise source,
and works by preventing the noise component
from flowing or radiating out of the line.