06-30-2003, 08:04 PM
I have had a 6A with MSD Blaster TFI coil and Tach adapter on my 1986 Speed Density Mustang GT almost 2 years. It has been working great. This winter I moved my wiring under the fenders, mounted the MSD there (now in a cooler place). The car started right up and ran but I noticed a loud chirping noise. When I put the plates on and started driving I discovered that if I tried to accelerate quicky when below 3000 rpm that the car bucked and would cut out. It also idled very rough, the tack would spike and then the car would almost die. I could tell from the smell of the exhaust that it wasn't working. I removed the unit and the car ran fine. Placed the 6A in another car and it worked fine. The chirping was still there, discovered it was the coil Part 8227. I switch to the stock coil and the noise went away. Tested coil in another car. Ran ok but still makes the noise. My car Car runs fine without the MSD for stock setup but I like my MSD. Any recommendations as to the cause? and how can I correct this?