Manger of Air Supply worked on my 1996 ford Truck. he said that he could repair the reason the Engine Warning light was coming on. I paid him nearly $2, 000 for mass air flow, O2 sensors, fuel tank and injector flush. he reset the engine computer so that when I picked up the truck that he engine light would not be on. I paid himn and drove it wawy only to see the light come on two mintues later. i took the truck back to him and he did more work to the truck for another $400. Then when I picked up the turck, he said the only problem was that I still needed to replace the engine computer. he said he took one off his vehicle and put it ont he truck and it worked fine, no engine light. So I paid him again and drove the truck home. I replaced the enginee computer with two other ones that functioned and tested perfectly but the engine light still came on. This place ripped me off for over $2, 000 and I still have a truck that has a brigh Check Engine light beaming on the dash.