1998 PONTIAC GRAND PRIX fuel pump

Fuel Gage
Your fuel gage tells you
about how much fuel you
have left when the ignition
is on. When the indicator
nears
EMPTY (E), you still
have a little fuel left, but
you should get more soon.
Here are some things owners ask about. All these
situations are normal and do not show a problem with
your fuel gage:
At the service station, the pump shuts off before the
gage reads
FULL (F).
0 It takes a little more or less fuel to fill up than the gage
indicated. For example, the gage may have indicated
the
tank was half full, but it actually took a little more
or less than
half the tank‘s capacity to fill it.
The gage moves a little when you turn a comer or
speed up. The gage needle should move no more
than 1/8 of a tank under any driving maneuver.
Low Fuel Light
If your fuel is low, a light
will come on and
stay on
until you add fuel.
LOW
FUEL
It will also come on for a few seconds when you first
turn on the ignition as a check to show you it’s working.
If it doesn’t come on then, see your dealer.
2-75

Filling a Portable Fuel Container
A CAUTION:
Never fill a portable fuel container while it is in
your vehicle. Static electricity discharge from the
container can ignite the gasoline vapor. You can
be badly burned and your vehicle damaged
if this
occurs.
To help avoid injury to you and others:
Dispense gasoline only into approved
containers.
0 Do not fill a container while it is inside a
vehicle, in a vehicle’s trunk, pickup bed
or
on any surface other than the ground.
0 Bring the fill nozzle in contact with the
1 inside of the fill opening before operating
the nozzle. Contact should be maintained
1 until the filling is complete.
~ 0 Don’t smoke while pumping gasoline.
i
Checking Things Under the Hood
A CAUTION: I
An electric fan under the hood can start up and
injure you even when the engine
is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
Things that burn can get on hot engine parts and
start a fire. These include liquids like gasoline,
1 oil, coolant, brake fluid, windshield washer and
other fluids, and plastic
or rubber. You or others
could be burned. Be careful not to drop or
spill
things that will burn onto a hot engine.
6-8

Before closing the hood, be sure all the filler caps are
on properly. Then just pull the hood down and close
it fiiy.
3800 Supercharged Engine
(If Equipped)
Your vehicle may have a 3800 Supercharged engine.
The supercharger is a device which is designed to pump
more air into the engine than it would normally use.
This air, mixed with fuel, creates increased engine
power. Since the supercharger is a pump and is driven
from an engine accessory drive belt, increased pressure
is available at all driving conditions.
The Powertrain Control Module (PCM) works with a
vacuum control to regulate the increased pressure
required during specific driving conditions. When this
increased pressure or boost is not desired, such as during
idling and light throttle cruising, the excess air that the supercharger is pumping is routed through a bypass.
All of these controls working together provide high
performance character and fuel efficiency
in the
3800 Supercharged engine.
Engine Oil
LOW OIL
LEVEL
If the LOW OIL LEVEL
light on the instrument
panel comes on, it means
you need to check
your
engine oil level right away.
For more information, see “Low
Oil Level Light” in the
Index. You should check your engine oil level regularly;
this is an added reminder.
It’s a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
The engine oil dipstick
handle is the yellow loop
near the front of the engine.
6-13

0
BAll MAIN 2
0
IQN MAIN 1
0 BAT MAIN 1
IQN MAIN 2
0
COOL FAN RELAY
SERIES r"- COOL FAN 2
LZJ
FUEL PUMP
(SUPERCHARGER
NEL PUMP SPEED
0
ION MODULE
0
0
ION MAIN
0
0
0
0
0
0
Fuse Description Fuse Description
COOL FAN 2 Cool Fan 2 COOL FAN 1 Cool Fan1
BAm MAIN 2 Battery Main 2 IGN MAIN 2 Ign Main 2
IGNMAIN 1 Ign Main 1 B/U LP Trunk Release,
HEADLAMPS Headlamps BATT MAIN 1 Ban Main 1
Back-up Lamps
6-66

Fuse
TRANSMISSION
mJEL PUMP
AC CLU/ABS IGN
IGN1-UH
IGN MODULE
INJ
ECM
PARK LP
FUTURE
SPARE
SPARE
SPARE
SPARE
FOG LP
mTUm
SPARE
Description
Automatic Transaxle:
Enable, Switch, Shift,
PWM
Fuel Pump
AC Clutch, ABS Ignition
MAF, Heated Sensors,
Canister Prg, Boost Solenoid
Ignition Module
Fuel Injectors
ECM/PCM
ChimeMall Module,
Taillamps, Parklamps,
Sidemarker Lamps,
Dimmable Lamps
Spare Fuse
Spare Fuse
Spare Fuse
Spare Fuse
Spare Fuse
Fog Lamps Spare Fuse
Spare Fuse
Fuse
SPARE
RADIO
HORN
ALT SENSE
Diode
AC DIODE
Relay
RELAY COOL FAN
SERIES
RELAY FUEL PUMP
(ONLY
SUPERCHARGER)
FUEL PUMP SPEED
RELAY COOL FAN
2
RELAY A/C CLUTCH
RELAY COOL FAN
1
IGN MAIN
RELAY HORN
RELAY FOG LP
Description
Spare Fuse
Radio, Keyless Entry,
Theft
Shock Sensor, Trip
Computer, HVAC Module,
ABS Module, Security LED
Horn
Alt Sense
Description
A/C Clu Diode
Description
Cooling Fan
Fuel Pump
Fuel Pump Speed Cont
Cooling Fan
2
A/C Clutch Cooling Fan
1
Ign Main
Horn
Fog Lamp