I just bought a ranger a few weeks ago and it has an exhaust leak. at first i though it was coming from the engine compartment but it sounds like it is coming from the passenger side under the floor. I crawled under To see if i could pinpoint it but i cant. Any ideas on what could be leaking? Its hurting power and mpg's a little and if you watch the rpm's they fluctuate slightly almost like a vacuum leak (Bad intake Gasket???), which is kind of annoying.
Any ideas are greatly appreaciated! Thanks!

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1993 Ranger XLT Single Cab Short Bed. 4.0 V6 5 Speed Manual Transmission. From the front to the back the mods are as follows:
Custom Brush Guard, Hella Driving/Fog Lights, 3" Suspension Lift, 33" Super Swampers, Custom Green Trimmed Dash Along With Green LEDs. Reinforced Skid Plates. More to Come