Ecotec lean code

[nickaluch]

2007 Pontiac G6 2.4 ecotec. Engine light on it's reading a lean condition cylinder 4 . Fuel injector? I know these cars have fuel injector issues or maybe I'm thinking manifold gasket?

 

[97prizm]

Can you provide the code or codes? It might help narrow down the issues.

 

[Lubener]

If you get a lean code specific to #4, try swapping that injector with another cylinder and recheck codes. Intake leak can affect just one cylinder. You can monitor fuel trims while spraying intake areas with carb cleaner.

 

[WobblyElvis]

Completely warmed up engine in park at low idle, MAF sensor should report about 2.4 grams/sec of air flow. It's cheap and easy to clean the MAF sensor.

 

[PF52]

Can you provide the code or codes? It might help narrow down the issues.

+2

I had a lean code, but it wasn't specific to any one particular cylinder. P0174 if I remember right..... Same engine, but in a Chevy Cobalt.

I wound up replacing all four injectors, which on that engine takes about 30 minutes tops. It took longer for the engine to re-learn its normal idle!

 

[Trav]

2007 Pontiac G6 2.4 ecotec. Engine light on it's reading a lean condition cylinder 4 . Fuel injector? I know these cars have fuel injector issues or maybe I'm thinking manifold gasket?

Those injectors have been a problem. The best were in the old ecotec (Bosch which are bulletproof, a real million mile injector), the worst were the Siemens/Deka and these fall in the middle. Luckily they are dirt cheap, you can get OE ACDELCO 2172907 for under $40ea from Rock.
If it has more than 100K on these I would recommend replacing them anyway, the do not clean well.