Thought I would post what I failed to see to correct my random misfire.
I thought I had checked everything listed to correct P0300. It came down to a small crack in one of the ignition coils. Felt really dumb not seeing the crack and not checking the OHM test of each coil. I only used a ignition spark light tester and thought all the coils were good.
Maybe this will help others.
p0300 randon misfire
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nos4blood70
- Certified Bonneville Nut
- Posts: 9522
- Joined: Mon May 10, 2010 6:11 pm
- Year and Trim: 2003 SLE
- Location: Chicago, IL
Re: p0300 randon misfire
Thanks for posting your experience in this matter.
Always a good place to start with misfires or chugging/sputtering issues: check over the whole ignition system.
Always a good place to start with misfires or chugging/sputtering issues: check over the whole ignition system.
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
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luke_dubs
- GXP Member
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- Year and Trim: 2013 Regal GS
- Location: OH
Re: p0300 randon misfire
I think someone should post a picture on where the ignition coil is located....yanno. Just for reference
'02 Pontiac Bonneville SE 108,539 miles, N/A, SSEi exhaust system, boat roller mount. Gone, but not forgotten.
'13 Buick Regal GS 122k miles, 270 hp, 295 lb/ft, ZZP intake.
(yes, there is a story behind my avatar.)
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Archon
- Resident Gearhead
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- Joined: Mon May 19, 2008 10:30 pm
- Year and Trim: 2014 Cadillac XTS Vsport.
- Location: Grand Rapids, Michigan
Re: p0300 randon misfire
Coils are on the lower left. It also shows which coils are associated with what cylinder.
Another view of the coils, to the right of the supercharger serpentine belt, and above the dipstick.
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.