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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
I finally got the car to start with the chip, but the car is running rough. It spudders and black smoke comes out the tail pipes. I thought I had a bad MAF sensor, but nope I bought a new one and still same problem. I adjusted fuel pressure, still same problem. With the fuel pump, you can hear it pressurize, but the sound doesn't stop like normal when you turn the key. When I pull the chip everything runs fine. I would call the place that did my custom chip but they work the same hours as I do.[/align][/align]1990 Gt Mustang 5 speed[/align]