Miss firing on multiple cylinders, is what computer test says, changed spark plugs, wires, and a coil cause the middle one (5,2) wasn't firing after all that still miss fire. What else could it be??

Miss firing on multiple cylinders, is what computer test says, changed spark plugs, wires, and a coil cause the middle one (5,2) wasn't firing after all that still miss fire. What else could it be?? 2 Answers

my car starts but is missing (miss fire code) causing lose of power and rough idle 12 Answers

My car (07 grand prix) is missing on 2 cylinders thinks is 2 and 4 I replaced coil pack but no change (old coil was still good) tested to the best of my ability the ignition module and I'm getting p...

My 1999 grand prix gtp hesitates on acceleration when boost guage kicks in i replaced plugs and plug wires and the mass air flow sensor also cleaned the throttle body out its throwing multiple misfire 5 Answers

my 1999 Pontiac grand prix gtp is running poorly when boost kicks in...it throws multiple misfire codes and nothing else..i replaced the plugs and wires with iridium plugs and mid grade wires also rep...

my pontiac grand prix 2001 check engine light came on. i checked the codes and the coils came up. i tried testing the coils myself with a small vacuum hose a a light tester to see if i was getting the right amount of spark and all of a sudden my car turns on but shuts off immediately after its been turned over. what could be my problem? please help 1 Answer

my pontiac grand prix 2001 check engine light came on. i checked the codes and the coils came up. i tried testing the coils myself with a small vacuum hose and a light tester to see if i was getting...

2004 Pontiac Grand over heating! After changed elbow fittings, what could it still be? Help! Just a single mom.... trying to keep cost down and fix myself!! 1 Answer

I have a 2004 Pontiac grand prix that over heated and was leaking antifreeze. There was a hole in the lower heating hose (the little elbow fitting under the alternator). So I changed both of the f...