High RPM

[Bluec10]

Drove my 05 Sierra (4.8) hard yesterday and found that at high RPM it seemed to get starved for fuel. The truck started to hesitate - kind of stutter - as I drove. Happens when accelerating to pass or other hard acceleration. Fuel filter? Fuel pump?

[oubobcat]

Fuel filter. Happened to me at 55 mph.

[Bad Bowtie2]

No fuel filters after the 2003 model.

 

I would run a can of Sea Foam fuel treament in your next 1/2 tank of gas. Probably just deposites in your fuel induction system? Maybe try cleaning your mass airflow sensor too with a safe electronic parts cleaner.

[txab]

No fuel filters after the 2003 model.

 

I would run a can of Sea Foam fuel treament in your next 1/2 tank of gas. Probably just deposites in your fuel induction system? Maybe try cleaning your mass airflow sensor too with a safe electronic parts cleaner.

 

Some flex fuel vehicles still had them for a few more years

 

 

 

 

Check fuel pressure. Key on engine off

Edited June 8, 2013 by txab

[Jennabear]

Check plugs and injectors too.

 

Sent from a jelly bean.

 

 

[tyhuck]

There has to be some sort of filter, doesnt it? I thought they had an in-tank filter.

[txab]

There is a sock type filter on the fuel pump. Not serviceable though like an externally mounted filter