Questions & Answers for: GMC Envoy engine misfire

...YOU HAVE A INLINE 6 CYLINDER ENGINE.YOUR MISS FIRE COULD BE THE COIL - SPARK PLUG - CLOGGED OR FAULTY FUEL INJECTOR. ALSO INTAKE MANIFOLD VACUUM LEAK OR SLIGHT HEAD GASKET LEAK WILL CAUSE

...running just fine TAKE VECHICLE TO AUTO ZONE OR ANY AUTO PARTS STORES THEY WILL CODE SCAN VECHICLE FREE.AND GIVE YOU YOUR FAULT CODES.ENGINE RUNNING ROUGH COULD BE A SEVERE CYLINDER ENGINE

p0300 2006 envoy what would cause this code 0300 P0300 indicates random multiple misfire. The engine computer is detecting a misfire on more than one cylinder. 

...low fuel pressure would not give me random misfire, but rather a O2 code because the engine is running lean.  Thank you------------------------------------ thank you very

...misfire 4.2 liter engine misfires on cylinder #2. A dead miss all the time. PO302 is set. Spark plugs were replaced...no change. Ignition coils were swapped..miss did not move, stayed on #2. checked ...

engine misfire engine misses and check engine light flashes you need to take it to autozone and have them scan it (for free) and they will tell which cylinders are miss fireing and most probable ...

...engine is misfiring according to your codes ...4 codes 4 problems P0300 - Random Cylinder Misfire DetectedP0301 - Cylinder 1 Misfire DetectedP0302 - P0312 Cylinder X Misfire DetectedP0325 - Knock ...

engine misfire and transmission sluggish Was told that #1 engine cylinder has over 40000 misfires....transmission feels sluggish when speeds are between 50 and 60 mph... I can shift the transmission ...

misfire. How can I fix it It is very common for the coils to go bad on these. If the engine is running rough than it should be fairly easy to swap the number 6 coil with another cylinders coil and see

...I fix it. The following is from the "Check Engine light" diagnostic: Cylinder misfire detected #2 cylinder. Ignition Coil Vacuum leak Large Vacuum Leak what was the diagnosis-- misfire-- lean ...