Were is air pump on 1999 olds bravada - 1999 Oldsmobile Bravada

is their pressure to rack---also new doesnt mean free from defects can have a failed seal in rack ---air bound

Hello Angela Hylton,

I always go for the fire, fuel & air first... but it starts... so
that's a really great indication... Could just need some fresh spark plugs... (ACDELCO R44LTS6) or a cold start valve ...

(get your OBD codes read FREE (See below).

~~ 4.3L V6 Plugged EXHAUST:

I've never found an elegant way to prove it...
So we'll just jump right into...

GET some liquid wrench Penetrating Oil and
soak the EXHAUST to CATALYTIC converter bolts
really well (couple of times).

If YOU OPEN the exhaust and the engine runs smooth...
you have found a PROBEM that will do both thing you are experiencing...

Now you have to figure if it is the CAT collapsing or a
MUFFLER BAFFLE blocking the out-flow.

(It's happened to me twice... but I'm pretty old)
((one converter & one muffler))

FREE... (to get you in the door)

Might be easier just to take it to a muffler shop...
and have them run your engine codes...

If you live in CALIFORNIA... we have DIFFERENT
parts, costs & requirements (of course).

((Somebody's BROTHER-IN-LAW is getting rich)).

But look up your prices on line... FIRST.
(know your prices BEFORE going in).

Hope this helps!!

http://www.rockauto.com/en/catalog/oldsmobile,1999,bravada,4.3l+v6,1356869,exhaust?a=Referer+www.ask.com+URL+%2F

1999 OLDSMOBILE BRAVADA 4 3L V6 Catalytic Converter RockAuto

1999 OLDSMOBILE BRAVADA 4 3L V6 Muffler RockAuto

More Information for ACDELCO R44LTS6

99,bravada,4.3l+v6, idle air valve
1999 OLDSMOBILE BRAVADA 4 3L V6 Idle Air Control IAC Valve RockAuto

change fuel filter and air filter spark plugs

maybe ignition modual

If you have a "Air pump installed on your TB then you need to replace pump and or check to make sure that the hose's are all connect to it prior to replacing the pump which is dependisng on which engine you have on the lower left side (passenger)
Models Affected
1999-2003 Chevrolet Blazer, S10
1999-2001 GMC Jimmy
1999-2003 GMC Sonoma
1999-2001 Oldsmobile Bravada
All with 2.2L or 4.3L Engine (VINs 4, H, 5, W -- RPOs LN2, L43, L35)
Condition
Some owners may comment on the check engine light being illuminated. Upon
investigation, the technician may find a DTC P0410 indicating there is a concern in the
secondary air injection system.
Cause
This concern may be attributed to water that may have collected in the AIR pump or the
vent solenoid and frozen or corroded the pump.
Correction
Replace the AIR pump and install a new inlet hose and solenoid tube assembly using
the following procedure:
1. Prep vehicle.
2. Raise vehicle on hoist.
3. Remove shield covering AIR pump.
4. Remove hose and vacuum lines from pump and solenoid.
5. Remove AIR pump inlet hose. Do not re-use.
6. Disconnect electrical connectors from pump and solenoid.
7. Remove pump mounting bolts and pump.
8. Transfer isolators from the old pump to the new pump.
9. Install new AIR pump and bolts to vehicle. Tighten the bolts to 17N·m (12.5 lb ft).
10. Route new hose assembly up between engine and fender. It should come up near
the area between the battery and the coolant bottle.
11. Connect new inlet hose to pump inlet.
12. Connect old outlet hose to pump outlet.
13. Connect electrical connector to pump.
14. Connect electrical connector for solenoid to connector on the new hose assembly.
15. Connect the hose with the white nipple to the vacuum source hose.
16. Connect the remaining hose to the shut off valve.
17. Install shield covering AIR pump.
18. Lower vehicle.
19. Remove coolant reservoir nut nearest the battery.
20. Route new hose assembly between the battery and the coolant reservoir with the solenoid on top.
21. Install the solenoid bracket onto the coolant reservoir stud and reinstall the nut
back into the vehicle.
22. Use a wire tie to keep the new hose assembly away from the engine. On four
cylinder engines, tie to the AIR outlet hose. On six cylinder engines, tie to an
available hole in the radiator fan shroud.
Part Information
Part Number Description Quantity

Pump on air suspension has probably failed. About a $400 fix at dealer.

when engine is cold remove radiator cap and check coolant level,sounds like it is really low and has an air pocket in it.

Aftermarket fuel pump failure? Try "thepartsladi" store on eBay for low price GM OEM parts. Could also be wiring harness to fuel pump.

it refers to the air injection system. first i would find out if the pump(when engadged) is pumping air. you can do this by taking off the rubber hoses that go to the exhaust manifold and feeling for cold air. if in fact there is air, your next "probability" is the "1 way check valve/s" that allow the air to flow only one way. you can check this byh simply shining a flash light so you can see the metal portion and then pushing moderately with a screwdriver to if it opens.

Your power steering pump is located right in front. You have to take the upper fan shroud off and the serpentine belt.  You will need an a power steering pump pulley remover as well, but I think you can barrow one from auto zone. You will also have to disconnect the pressure and return hoses from the backside of the pump. Then remove the pump mounting fasteners and lift it out of the truck. Also on 99 4.3 liter you need to unbolt the filler tube from the air conditioning compressor.  ( call an auto parts store to see if you air system needs to be decompressed before removing the filler tube)