94 w/4.0L sluggish and loss of power at speed...
New to the site and I thought I'd ask for opinions on this one.
I have a 94 XLT with a 4.0L auto, 170K miles and I have been losing power it seems at high speeds for about a year now. No oil leaks, no cooling problems, nothing... just lack of power.
From a stop, and at low speeds, the truck seems to have plenty of power. However, when on the highway going up on an overpass, I lose power. I'll slowly press the accelerator trying to maintain speed as I'm rising up the overpass, but inevitably I need to just about floor it to get it to drop down a gear.
I've also noticed the loss of power when pulling a small boat (less than 1,000 lbs).
The truck is old and has some mileage... I'd hate to think she's just getting tired and on her way out.
Anyone experience this type of loss in power? If so, I'd appreciate hearing what you may have done to improve this.