Loss of Power

fireball2889 · **Posted:** Sun Mar 21, 2010 10:48 am

i have an o5 libby with 93000 on it and when compared to my brothers 06 libby with 83000 mine has a severve loss of power but still getting between 22-28 mpg on the hwy and 18-19 in the city.anyone experianced this before. pls help.

TexasRock · **Posted:** Sun Mar 21, 2010 3:31 pm

Whens the last time it had a complete tune up?

fireball2889 · **Posted:** Sun Mar 21, 2010 3:36 pm

it has had the fuel system completely cleaned professionally i just put new plugs in 3k ago and i only run ethonal free fuel, air filter is due in 5k more miles and oil was just changed

tjkoen01 · **Posted:** Mon Mar 22, 2010 9:40 am

fireball2889 wrote:

i have an o5 libby with 93000 on it and when compared to my brothers 06 libby with 83000 mine has a severve loss of power but still getting between 22-28 mpg on the hwy and 18-19 in the city.anyone experianced this before. pls help.

with those mpg's, i wouldn't complain!! :SOMBRERO:

Daksport · **Posted:** Mon Mar 22, 2010 11:35 am

If the full tuneup has been completed on the motor, start looking for restriction issues especially in the exhaust. If the cat is bunged up that will kill the performance.

fireball2889 · **Posted:** Mon Mar 22, 2010 1:54 pm

i just put some marvels in the tank and the power all came back kind of weird where do i take it to have the cat checked out?

JeepinJarhead03 · **Posted:** Mon Mar 22, 2010 2:11 pm

MMM wouldn't have brought the power back if the issue was the Cats

have you checked your airfilter, cleaned the throttlebody etc?

coulda just had some crap on your valves from having the fuel system cleaned out, or the fuel injectors could have still been gunked

fireball2889 · **Posted:** Mon Mar 22, 2010 6:38 pm

might have been some build up on the valves throttlebody was proffesionally cleaned and the air filter is due in 4k miles, its like sometimes the power will come and go for no apperant reason

JeepinJarhead03 · **Posted:** Mon Mar 22, 2010 7:30 pm

does the idle seem to be stable?

fireball2889 · **Posted:** Tue Mar 23, 2010 2:23 pm

idle seems stable was pretty rough until after i ran the tank of marvels through. i have to run conventional oil otherwise i get a knocking noise sorta like a wrist pin know but only would do it at idle and only with synthetic or synthetic blended oils.

Loss of Power

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