my car chugs misses and sputters under acceleration engine light is on. codes p0300 p0404 and p0411 keep returning. coils are good module is good plugs and wires are good

my car chugs misses and sputters under acceleration engine light is on. codes p0300 p0404 and p0411 keep returning. coils are good module is good plugs and wires are good 1 Answer

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...

2008 Pontiac Grand Prix 3.8L My car has a P0300 diagnostic code. Check engine light is on, and typically flashes if I exceed about 30 miles an hour. How can I fix this?! 3 Answers

I have changed my ignition coils, cleaned my throttle body, egr valve, and added a bottle of fuel injector cleaner into my last tank of gas. Worked fine for about a week and started again. It has...

my 2005 Grand Prix only clicks when trying to start it..the battery is good...put new starter on and that is not the answer...it clicks and just wont start...we have tried trouble shooting and still 10 Answers

we are at witts end...it only con't to click when trying to start..put on a new starter and still only clicks..will not start..we have done some troulble shooting...what are we missing here...plz hel...