Any advice is appreciated.
I have a 98 Jimmy SLE A/T. Driving at 30 - 35 mph it will be running
perfectly and then the engine will start coughing like a miss or lack of
Sometimes the engine will die. It starts immediately with the key.
This also happened about 15,000 miles ago but at higher speeds like 60 - 70
It does not set any codes for the mechanic to check.
At that time I changes plugs, plug wires, distributor cap and rotor. Also
changed fuel and air filters.
Problem seemed to go away. Now it's back again.
When the problem is NOT happening the engine and trans run perfectly.