Lots of black smoke under acceleration?

[Mr. Hemi]

I have lots of black smoke under even modest acceleration . Poor fuel milage too. Drive rather easily yet 13-14 around town, 17 highway. 2004. 5 auto, 3. 73 rear, stock tire size. Used to get 16-18 around town and 22 highway.

Am wondering if injectors or FCA (fuel control actuator). Been awhile since I have been here as I have put a lot of hours on work since last post.

Hoping it is something under warranty as I have a buddy who is a dealer mechanic and luckily can request him to do the service. Just need some pointers to send him to the right direction.

 

[p-Bar]

any gauges sounds like a boost problem. Check your oil level may have a leaky injector. FCA usually rough idle

 

[GaryOwen]

Try changing air filter if you haven't already. Check intake hose connections. Could also be an injector leaking. Possilby a MAP sensor. Any codes?

 

[Mr. Hemi]

No codes, filter minder does get moved a bit after hard pulls and it is getting time to change the air filter.

Oil level seems fine, have had it analyzed in the past with no abnormalities although I have heard of others having injector trouble.

Thanks.

 

[HBarlow]

Black smoke means overfueling. It could mean an injector stuck open or cracked tip, fuel dilution in the crankcase, and eventual engine destruction.

I'd get it to a dealer asap and stop driving it immediately. I'm not a mechanic or an expert on fuel injectors but one of the tests that dealers can perform to aid in diagnosis is "cylinder performance test" which measures and compares the power produced by each cylinder. I don't know if the test will detect a failed or failing injector.