I messed with the ignition coils now car starts then shakes. Then when put in drive moves 50 feet then shuts off.
Sep 15, 2022 at 5:19 PM
Code p0300?
2003 MITSUBISHI GALANT
JACOBPAULSEN
- MEMBER
- 64 POSTS
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STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
Yep, this is a random engine misfire code, which can be one of two things, either you have a weal fuel pump or the MAF sensor is going out. Let's start with the fuel pressure which you get rent a gauge for at the auto parts store. This guide can help you see how to do the job with diagrams below to help as well:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Fuel pressure
ITEMS .................... STANDARD VALUE
Vacuum hose disconnected .................... 330 - 350 kPa (47 - 50 psi) at curb idle
Vacuum hose connected .................... Approximately 270 kPa (38 psi) at curb idle
Check out the images (below). Please let us know what you find.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Fuel pressure
ITEMS .................... STANDARD VALUE
Vacuum hose disconnected .................... 330 - 350 kPa (47 - 50 psi) at curb idle
Vacuum hose connected .................... Approximately 270 kPa (38 psi) at curb idle
Check out the images (below). Please let us know what you find.
Images (Click to enlarge)
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Sep 16, 2022 at 11:08 AM
The car worked fine until I pulled the ignition coils out and put them back in. So, you don't think that the code has anything to do with that.
Sep 16, 2022 at 12:55 PM
Also, the car runs super rich.
Sep 17, 2022 at 10:07 AM
STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
Yes, it could take apart the coils again and looks for bad connections. Also, if you can upload a short video of how the engine runs, I can tell you what's going on. Try to unplug the MAF sensor to see if it changes.
Sep 19, 2022 at 3:31 PM
i got it btw.
Nov 7, 2022 at 11:51 AM
STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
Nice work. Can I ask what the problem was?
Nov 8, 2022 at 10:04 AM
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