Misfire P0300 P0303 Help!
Thread Starter
JK Newbie
Joined: Jun 2011
Posts: 26
Likes: 0
From: Indianapolis, IN
Misfire P0300 P0303 Help!
Ok so the other morning leaving a friends, Blue (2008 JK Unlimited about 57k) started dinging check engine light came on (was on steadily then would flash=oh damn). The jeep started the usual vibrating and "cutting out" misfiring. Coded it popped up P0300 & P0303. Changed spark plugs and coil pack. Then realized that the exhaust had that unfriendly smell of rotten eggs.... Is it a safe bet that its the catalytic converter(s)?
JK Jedi Master
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine
Ok so the other morning leaving a friends, Blue (2008 JK Unlimited about 57k) started dinging check engine light came on (was on steadily then would flash=oh damn). The jeep started the usual vibrating and "cutting out" misfiring. Coded it popped up P0300 & P0303. Changed spark plugs and coil pack. Then realized that the exhaust had that unfriendly smell of rotten eggs.... Is it a safe bet that its the catalytic converter(s)?
There are many possible causes for the misfire.
JK Newbie
Joined: Oct 2006
Posts: 45
Likes: 1
From: San Diego
[SUB][/SUB]
Just checking in since it's been a couple of months since your repairs.
I had codes P0300 and P0305 come up and finally had them addressed. Mechanic replaced my coil pack, plugs were ok. It's been a day and not a hint of the 'cutting out' or vibrating we were both experiencing, so, so far so good. *crossing fingers*
How is your JK holding up since?
Thanks!
-- AL
Ok so the other morning leaving a friends, Blue (2008 JK Unlimited about 57k) started dinging check engine light came on (was on steadily then would flash=oh damn). The jeep started the usual vibrating and "cutting out" misfiring. Coded it popped up P0300 & P0303. Changed spark plugs and coil pack. Then realized that the exhaust had that unfriendly smell of rotten eggs.... Is it a safe bet that its the catalytic converter(s)?
Just checking in since it's been a couple of months since your repairs.
I had codes P0300 and P0305 come up and finally had them addressed. Mechanic replaced my coil pack, plugs were ok. It's been a day and not a hint of the 'cutting out' or vibrating we were both experiencing, so, so far so good. *crossing fingers*How is your JK holding up since?
Thanks!
-- AL
