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6.0 Trouble

karsong

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karsong New Member

karsong

Posted
Posted

i have a 99 gmc 2500 automatic. it studders when the rpms are low 750 to 1500. Only when i lay into it. its fine if i just easy on the accelerator. just changed the plugs 1000 miles ago. fuel filter was done a year ago. it studders wether its in drive or not. im thinking its a fuel problem but idk. anything i should check? still getting good milage. 13-15

thanks

DofD Senior Enthusiast

DofD

Posted
Posted

I would suggest getting your fuel pressure checked.

 

Have you replaced the fuel filter?

karsong New Member

karsong

Posted
  • Author
Posted

no DTCs and just did a fuel filter today along with cleaning the MAFs and throttle body. also replaced the air filter. It seems to be better. ill know for sure tomorrow on my commute. thanks for the info ill let you know if that fixed it.

pennzoil29 Senior Enthusiast

pennzoil29

Posted
Posted
no DTCs and just did a fuel filter today along with cleaning the MAFs and throttle body. also replaced the air filter. It seems to be better. ill know for sure tomorrow on my commute. thanks for the info ill let you know if that fixed it.

 

You beet me to it. :uhoh:

Draenor Senior Enthusiast

Draenor

Posted
Posted
no DTCs and just did a fuel filter today along with cleaning the MAFs and throttle body. also replaced the air filter. It seems to be better. ill know for sure tomorrow on my commute. thanks for the info ill let you know if that fixed it.

Excellent. Servicing these should do the trick.

  • 3 weeks later...
karsong New Member

karsong

Posted
  • Author
Posted
no DTCs and just did a fuel filter today along with cleaning the MAFs and throttle body. also replaced the air filter. It seems to be better. ill know for sure tomorrow on my commute. thanks for the info ill let you know if that fixed it.

Excellent. Servicing these should do the trick.

 

 

 

so no fix yet. i just replaced the mafs. the truck has been tuned with efi live but i have never had this problem timing is around 20 and im running 87 octane. any ideas

desrtrat Senior Enthusiast

desrtrat

Posted
Posted

put 2 cans of seafoam in a full gas tank. sounds like dirty injector(s)

why did you change your MAF? was it bad, or were you given bad advice?

 

good luck

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