check engine CHEVROLET ASTRO 1998 2.G Service Manual

Downloaded from www.Manualslib.com manuals search engine I Fuel
You can be injured and J licle could be
damaged if you
try to do service work on a
vehicle without knowing enough about it.
! 0 Be sure you have sufficient knowledge,
I
experience, the proper replacement parts
and tools before you attempt any vehicle
maintenance task.
Be sure to use the proper nuts, bolts and
other fasteners. “English” and “metric”
fasteners can be easily confused.
If you use
the wrong fasteners, parts can later break
or fall
off. You could be hurt.
Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your vehicle can
affect the airflow around
it. This may cause wind noise
and affect windshield washer performance. Check with
your dealer before adding equipment to the outside of
your vehicle. Use
regular unleaded gasoline rated at 87 octane or
higher. At a minimum, it should meet specifications
ASTM D48 14 in the United States and CGSB 3.5-M93
in Canada. Improved gasoline specifications haw been
developed by the American Automobile Manufacturers
Association (AAMA) for better vehicle performance
and engine protection. Gasolines meeting the AAMA
specification could provide improved driveability and
emission control system protection compared
to
other gasolines.
Be sure the posted octane is at least 87.
If the octane is
less than 87, you may get a heavy knocking noise when
you drive.
If it’s bad enough, it can damage your engine.
If you’re using fuel rated at
87 octane or higher and you
hear heavy knocking, your engine needs service. But
don’t worry if you hear a little pinging noise when
you’re accelerating or driving up a
hill. That’s normal,
and you don’t have to buy a higher octane fuel to get rid
of pinging. It’s the heavy, constant knock that means
you have a problem.

Downloaded from www.Manualslib.com manuals search engine If your vehicle is certified to meet California Emission
Standards (indicated on the underhood emission control
label), it is designed to operate on fuels that meet
California specifications.
If such fuels are not available
in states adopting California emissions standards, your
vehicle will operate satisfactorily on fuels meeting
federal specifications, but emission control system
performance may be affected. The malfunction indicator
lamp on your instrument panel may turn
on and/or your
vehicle may fail a smog-check test. If this occurs, return
to your authorized
GM dealer for diagnosis to determine
the cause of failure. In the event it
is determined that the
cause
of the condition is the type of fuels used, repairs
may not be covered by your warranty.
Some gasolines that
are not reformulated for low
emissions contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl (MMT);
ask your service station operator whether or not his fuel
contains MMT. General Motors does not recommend the
use
of such gasolines. If fuels containing MMT are used,
spark plug life may be reduced and your emission
control system performance may be affected. The
malfunction indicator lamp on your instrument panel
may turn
on. If this occurs, return to your authorized
GM dealer for service. To provide cleaner air, all
gasolines in the United States
are now required to contain additives that will help
prevent deposits from forming in your engine and fuel
system, allowing your emission control system
to
function properly. Therefore, you should not have to add
anything
to the fuel. In addition, gasolines containing
oxygenates, such as ethers and ethanol, and
reformulated gasolines may be available
in your area to
help clean the air. General Motors recommends that
you
use these gasolines if they comply with the
specifications described earlier.
NOTICE:
Your vehicle was not designed for fuel that
contains methanol. Don’t use it. It can corrode
metal parts in your fuel system and also damage
plastic and rubber parts. That damage wouldn’t
be covered under your warranty.
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Downloaded from www.Manualslib.com manuals search engine Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard to
find. Never use leaded gasoline or any other fuel not
recommended in the previous text on fuel. Costly repairs
caused by
use of improper fuel wouldn’t be covered by
your warranty.
To check on fuel availability, ask an auto club, or
contact
a major oil company that does business in the
country where you’ll be driving.
You can also write
us at the following address for
advice. Just tell us where you’re going and give your
Vehicle Identification Number (VIN).
General Motors Overseas Distribution Corporation
1908 Colonel Sam Drive
Oshawa, Ontario
L1H 8P7
Filling Your Tank
A CAUTION:
--
Gasoline vapor is highly flaml,,~ble. It burns
violently, and that can cause very bad injuries.
Don’t smoke if you’re near gasoline or refueling
your vehicle. Keep sparks, flames and smoking
materials away from gasoline.
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NOTICE:
If you need a new cap, be sure to get the right
type. Your dealer can get one for you.
If you get
the wrong type, it may not fit properly. This may cause your malfunction indicator lamp to light and your fuel tank and emissions system may be
damaged. See “Malfunction Indicator Lamp” in
the Index.
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.
CAUTION: (Continued)
I
Do not fill a container whilc : is inside a
vehicle, in a vehicle’s trunk, pickup bed or
on any surface other than the ground.
inside of the fill opening before operating
the nozzle. Contact should be maintained
until the filling
is complete.
0 Bring the fill nozzle in contact with the
Don’t smoke while pumping gasoline.
Checking Things Under the Hood
A CAUTION: I
Things that burn can get on hot engine parts and
start a fire. These include liquids like gasoline,
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.
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I
Lift the hood, release the hood prop from its retainer and
put the hood prop into the slot in the hood.
Before closing the hood, be sure all the filler caps
are on
properly. Then lift the hood to relieve pressure on the
hood prop. Remove the
hood prop from
the slot in the hood and
I return the
Drop to its retainer. 1.L
Then just pull the hood
down and close it firmly.
Engine Oil
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.
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Downloaded from www.Manualslib.com manuals search engine Automatic Transmission Fluid
When to Check and Change
How to Check
Because this operation can be a little difficult, you may
choose
to have this done at your GM dealership ~
A good time to check your automatic transmission fluid Service Department.
level is when the engine oil
is changed.
Change both the fluid and filter every
15,000 miles here, or you could get a false reading on the dipstick.\

(25 000 km) if the vehicle is mainly driven under one or If
you do
it yourself, be sure to follow all the instructions
more of these conditions:
0 In heavy city traffic where the outside temperature
0 In hilly or mountainous terrain.
0 When doing frequent trailer towing.
regularly reaches
90°F (32 “C) or
higher.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
the fluid could come out and fall on hot engine
Uses such as found in taxi, police or delivery service.
If you do not
use your vehicle under any of
these conditions, change the fluid and filter every
50,000 miles (83 000 km).
parts or exhaust system parts, starting a fire. Be
sure to get an accurate reading if you check your
transmission fluid.
See “Scheduled Maintenance Services’’ in the Index.
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’Wait at least 30 minutes before checking the
transmission fluid level if you have been driving:
When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
0 In heavy traffic -- especially in hot weather.
0 While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which
is 180°F to 200°F
182°C to 93 ” C). See “Checking Transmission Fluid
’Hot” in the Index.
Checking Transmission Fluid Hot
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
(10°C). If it’s colder than 50°F (lO”C), drive the
vehicle in DRIVE
(D) until the engine temperature gage
moves and then remains steady for
10 minutes. Then
follow the hot check procedures.
Checking Transmission Fluid Cold
A cold check is made after the vehicle has been sitting
for eight hours or more with the engine off and is used
only as a reference. Let the engine run at idle for five
minutes
if outside temperatures are 50°F (10°C) or
more. If it’s colder than
50°F ( 10°C), you may have to
idle the engine longer. Should the fluid level be low
during
a cold check, you must perform a hot check
before adding fluid. This will give you a more accurate
reading
of the fluid level.
Checking the Fluid Hot or Cold
Park your vehicle on a level place. Keep the
engine running.
With the parking brake applied, place the shift lever
in PARK (P)
.
With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about
three seconds in each range. Then, position the shift
lever in
PARK (P).
0 Let the engine run at idle for three minutes or more.
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Then, without shutting off the engine, follow these steps:
The transmission dipstick has a red handle and
is located near
the center of the engine compartment behind the air cleaner.
1. Flip the handle up and then pull out the dipstick and
wipe it with a clean rag or paper towel.
then pull it back out again.
2. Push it back in all the way, wait three seconds and
3. Check both sides of the dipstick, and read the lower
level. The fluid level must be in the
COLD area for a
cold check or in the
HOT area or cross-hatched area
for a hot check.
4. If the fluid level is in the acceptable range, push the
dipstick back
in all the way; then flip the handle
down to lock the dipstick in place.
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Downloaded from www.Manualslib.com manuals search engine How to Add Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. See “Recommended
Fluids and Lubricants” in the Index.
Add fluid
only after checking the transmission fluid
while it is hot. (A cold check is used
only as a
reference.) If the fluid level is low, add only enough of
the proper fluid to bring the level up to the HOT area for
a hot check. It doesn’t take much fluid, generally less
than one pint
(0.5 L). Don’t overji11.
NOTICE:
We recommend you use only fluid labeled
DEXRON@-111, because fluid with that label is
made especially for your automatic transmission.
Damage caused by fluid other than DEXRON-I11
is not covered by your new vehicle warranty.
After adding fluid, recheck the fluid level as
described under “How
to Check.”
When the correct fluid level is obtained, push the
dipstick back in
all the way; then flip the handle
down to lock the dipstick in place.
All-Wheel Drive
If you have an all-wheel-drive vehicle, be sure to
perform
the lubricant checks described in this section.
However, they have two additional systems that
need lubrication.
Transfer Case
When to Check Lubricant
Refer to the Maintenance Schedule to determine how
often to check
the lubricant. See “Periodic Maintenance
Inspections” in the Index.
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Downloaded from www.Manualslib.com manuals search engine How to Check Lubricant Front Axle
When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
“Scheduled Maintenance Services’’ in the Index.
If the level is below the bottom
of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See “Recommended Fluids and
Lubricants” in the Index.
How to Check Lubricant
If the level is below the
bottom of the filler plug
hole, you’ll need to add
some lubricant. Add enough
lubricant to raise the level to
the bottom
of the filler
plug hole.
What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See “Recommended Fluids and
Lubricants” in the Index.
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