Got a '95 w/h the 5.8l engine & the check engine soon light comes on after driving it about a 1/2-3/4 mile & stays on.Ran the codes & one was 133 low vacuum to map sensor,the map sesor has been replaced,I pulled the line off the map w/h the engine running & there's plenty of vacuum to it.It also gave a low voltage code to the egr(can't remember the #)so I replaced the egr valve SENSOR still no go,light comes on after driving the stated distance.Thanks for ANY help! Scott