There Is Noise When Starting The Engine - Dodge Stealth 1994 Service Manual

A-6 There is noise when starting the engine.
Noise type Conditions
Sounds are in
parentheses ( ).
AM, FM:
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Ignition noise causing the popping sound to
(Popping, Snapping, speed up, and volume decreases.
Cracking, Buzzing)
l
switch is turned to ACC.
Other electrical
components
Static electricity
l
(Cracking, completely stopped.
Crinkling)
l
engaged.
Various noises are produced
l
depending on the body part of
the vehicle.
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
The condenser does not pass D.C. current, but
as the number of waves increases when it
passes A.C. current, impedance (resistance
CHASSIS ELECTRICAL
Increasing the engine speed
Disappears when the ignition
Disappears when the vehicle is
Severe when the clutch is
Cause
Mainly due to the
l
spark plugs.
Due to the engine
l
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.
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.
2. 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.
Inspection or replacement (
preventive
(next page)
Noise filter
l
2, 4
Ground
l
cable
Noise
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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.