07 pontiac wave help! (gas mileage has dropped)

[Scanman]

Maybe a hose melting? It might help if you could post pics of the engine compartment.

I'm sure you'd know if the cam timing was off. You would probably be engine or car shopping!

[Chevy Customer Svc]

stanzz,

As you're using kilometers as your unit of measure, I am guessing that you're writing from Canada? If you are ever in need of Customer Service, GM of Canada can be reached at 800-263-3777 (Hours: M-F 7:30am - 11:30pm, Sat 7:30am - 6:00 EST). Let us know if you're from a different location and we'll help you get in touch with customer service for your region.

Sarah (Assisting Vanessa), Chevrolet Customer Service

[stanzz]

ok, going to chech engine hoses. that might have been the wax small i had mentioned. of course it's snowing today! cheerz from canada.

[Scanman]

of course it's snowing today! cheerz from canada.

LOL! Sunny & 65 degrees on the Gulf Coast! I DON'T miss the snow!

[stanzz]

what part is circled here? i took off my air intake, stuck my finger in, and out came some black gunk! i think i need to clean this.

[Aveo5_boy]

what part is circled here? i took off my air intake, stuck my finger in, and out came some black gunk! i think i need to clean this.

That is your throttle body.

[Scanman]

That's your throttle body. From what I've read on here, lots of people have to clean them regularly. I've not had any problems, so I can't say if that'll cause your troubles, but it is part of the fuel system, so it's possible. I'd recommend cleaning it up either way.

[stanzz]

anyone have write-up's on removing intake manifold?

[Aveo5_boy]

anyone have write-up's on removing intake manifold?

Removal & Installation

1. Properly relieve the fuel system pressure.
2. Disconnect the negative battery cable.
3. Drain the cooling system.
4. Disconnect the intake air temperature (IAT) sensor connector.
5. Disconnect the air intake assembly from the throttle body.
6. Disconnect the idle air control (IAC) valve connector and throttle position sensor (TPS) connector.
7. Remove the alternator adjusting bolt and the accessory drive belt.
8. Disconnect the engine coolant temperature (ECT) sensor connector.
9. Disconnect the heater inlet hose from the cylinder head.
10. Disconnect the surge tank coolant hose at the throttle body.
11. Disconnect all of the necessary vacuum hoses, including the vacuum hose at the fuel pressure regulator and the brake boaster vacuum hose at the intake manifold.
12. Disconnect the throttle body cable from the throttle body and the intake manifold.
13. Remove the fuel injector rail and fuel injectors as an assembly.
14. Remove the alternator adjusting bracket bolt from the intake manifold and remove the alternator adjusting bracket.
15. Remove the intake manifold support bracket bolts and the intake manifold support bracket.
16. Remove the intake manifold retaining nuts/bolts in the sequence shown.
17. Remove the intake manifold and gasket.
    

To install:

1. Clean the sealing surfaces of the intake manifold and the cylinder head.
2. Install the intake manifold with a new gasket. Tighten the retaining nuts/bolts in the sequence shown to 18 ft. lbs. (25 Nm).
   
3. Install the intake manifold support bracket and tighten the bracket bolts to 18 ft. lbs. (25 Nm).
4. Install the intake manifold support bracket lower bolt-to-engine block.
5. Install the fuel rail and fuel injectors as an assembly.
6. Connect the throttle cable to the intake manifold and the throttle body.
7. Connect all of the necessary vacuum lines that were previously disconnected.
8. Connect the heater inlet hose to the cylinder head.
9. Connect the surge tank coolant hose to the throttle body.
10. Install the alternator adjusting bracket at the intake manifold and tighten the bracket bolts to 11 ft. lbs. (15 Nm).
11. Install the alternator adjusting bolt and the accessory drive belt.
12. Connect the ECT sensor connector, IAC valve connector and TPS connector.
13. Connect the air intake assembly to the throttle body.
14. Connect the IAT sensor connector.
15. Connect the powertrain control module (PCM)/engine control module (ECM) ground terminal to the intake manifold.
16. Reinstall the fuel pump fuse.
17. Connect the negative battery cable.
18. Refill the cooling system to the correct level.
19. Start the engine and check for leaks.

Pic 1:

Intake manifold bolt removal sequence—1.6L engine

Pic 2:

Intake manifold bolt tightening sequence—1.6L engine

[stanzz]

wow, i wonder how much the dealership would charge for this?