I have a P0300 random misfire that is robbing power and wasting lots of gas.
85

Asked by scho Dec 31, 2013 at 07:32 PM about the 2003 Pontiac Sunfire

Question type: Maintenance & Repair

When I am idling my engine light stays on solid.  As I drive the RPM's go up and up until i let off the gas but the light stays solid.  As soon as the transmision shifts to the next gear, the light flashes and stays flashing until i come to a stop and then it is solid again.  Any ideas what is causing the problem?  i originally thought it was a bad coil but when i replaced it it wouldn't even start up the car. I put a diffrent brand new coil on it but the same result.  I put my old one back on and it starts up but runs and idles rough with no power at all.

5 Answers
201,065

dandyoun answered 10 years ago

http://www.obd-codes.com/p0300 -- this may help

10 people found this helpful.
Mark helpful
85

scho answered 10 years ago

I had bosch platinums put in about a month before the problem started. I pulled them and when I tried to replace the coil with a new one i put AC delco plugs in. the coil would not even start my car up but the old one does. I put a second new coil in with the same result so i don't think I got a bad coil from parts store.

3 people found this helpful.
Mark helpful
85

scho answered 10 years ago

I have a 2.2L OHc Ecotec. It has no wires just a coil on top with boots that slide onto plugs as you tighten the coil cover up.

5 people found this helpful.
Mark helpful
80

Travis answered 8 years ago

Check out this video I made might help! https://www.youtube.com/watch?v=dtNQWj26RNU

8 people found this helpful.
Mark helpful
10

super007 answered 7 years ago

just change ignition control module on top of coil pack and everything will be o.k. i change mine for test on my sunfire 2005 and everything come like new, no more codes and i pay only $65 on internet for the module

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Sunfire

Looking for a Used Sunfire in your area?

CarGurus has 4 nationwide Sunfire listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Pontiac Sunfire Questions

CarGurus Experts

  • #1
    John Saffrahn
    Reputation
    4,300
  • #2
    Joeyadams
    Reputation
    1,610
  • #3
    Warren0007
    Reputation
    1,390
View All

Find great deals from top-rated dealers

Search

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.