Need a little help I have a 94 XR7 with a 3.8, ok here's the problem i'am getting a code 157 which i understand is a mas sensor. I have pulled the mas out and cleaned it no broken wires all is good there. So why i'am i still getting a code? Can you check it to see if it works? If so how do you do that? Any pictures oftesting a mas? Or diagram on it. Any help would be great.