05 Jeep Liberty sport power issue

[desillman]

I was seeing if I can pick someone else’s brain about this issue. My Liberty doesn’t seem to have the power it once had. I’ve had it for a few years now and when I bought it, it seems to have a little “snap” when you got on it. Now it just seems a little doggy on acceleration and power in general. Would this be possibly a fuel system issue(filter,injectors,pump)? I’ve done all maintenance on it and have never replaced any of these things. Just wondering if anyone has had this issue before. Thanks

 

[LibertyTC]

Welcome to the forums.
Did you replace the spark plugs with these exact NGK copper cores ?
These are the only plugs the Jeep likes and they should be replaced every 35K.

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If fuel pressure is suspected, get a fuel pressure gauge (hooked into fuel rail) & report back the psi, key on then running, and then off for 10 minutes as a leak down.

 

[Shane Giggie]

I agree, change the plugs. Try some Gumot fuel injector cleaner with the P.E.A, my 06 was a little doggy and it brought it around.

 

[Bill chase]

do a carbon removal treatment of the intake and valves. that will wake it up.