[90 stock stang]

My 90 GT has a miss in fifth gear while driving on the highway. This is the only gear that I notice the miss in. If I am going 70mph and give the car steady throttle to increase my speed to 80-90 mph sometimes even though the car will continue to accelerate you will feel a miss and this also sometimes happens if you floor it while acelerating in fifth. If you downshift to fourth I do not notice it and I do not notice it while going through the gears around town even when running the car a little hard. I never noticed this miss before in the 20,000 miles that I have put on it. I think the distributor cap and rotor may be getting old but do you have any other suggestions.

 

[lxarlo]

an ignition tuneup is a good idea. the reason you feel it in fifth is because thats the gear that the engine is most loaded down. even more so with stock 2.73 gears.

 

[EagleAutosports]

Definately do an ignition tune up.

 

[90 stock stang]

I will replace the cap and rotor soon. The plugs, plug wires and coil and tfi are all fairly new and when I lift the hood at night time I do not seen any sparks arching so It may just be the cap and rotor I hope.

 

[heavy metal]

agree with ign. problem....sounds like a plugwire breaking down.