START WITH THE BASIC THREE STEPS... FUEL, FIRE , COMPRESSION.. CHECK THE FUEL FILTER, THEN THE THROTTLE BODY MAY NEED TO BE CLEANED...THAT IS TYPICAL PROBLEMS WITH THEM
yes it can
High idle, misfire, check engine light,High idle, misfire, check engine light,
Check idle adjustment (rpm) then check timing, then check for misfire-start there.
Well...the misfire on 1 and 3 would explain the rough idle. The misfire could be from worn plugs, wires, bad coil, or bad injectors.
Morgan
Run a compression test.
Check engine light is on with a misfire code, rough idle, lack of power, low compression.
The 1998 Blazer could have several problems causing rough idle. Check the air filter, fuel pressure, and EGR valve for a clog to look for the problem.
Check the Park Avenue EGR valve for a clog. A clogged valve can cause a rough idle and stall at a light.
There are several things that can cause your 2004 Chevrolet Trailblazer to idle rough. The most common causes are a dirty fuel filter or a dirty air filter.
Misfire is usually caused by faulty wires or spark plugs or both. Throttle position sensor failure generally causes poor response to the throttle. That is poor acceleration, slow to return to idle and rough idle.
Doubtful. Bad spark plugs would give you a rough idle, hesitation and poor performance. And they may also give you a P0300 code for random misfire.