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 Post subject: Code 0303
PostPosted: Tue May 29, 2018 10:06 am 
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SLE Member
SLE Member

Joined: Wed Apr 15, 2015 8:39 am
Posts: 74
Location: Ira, MI
Year and Trim: 2001 Bonneville
Hello,

I have developed a horrible mis-fire and code P0303.

Before I start throwing money at this 2001 SE, can you recommend a no cost route?
It's worse when its humid or wet outside.

I have read that it could be:

Bad coil
Bad plug
Bad wire
Bad ICM

Thanks in advance.
Lee


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 Post subject: Re: Code 0303
PostPosted: Tue May 29, 2018 12:27 pm 
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Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1588
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
first see if the wire boot is seated on the #3 cylinder properly - follow the wire from the coil that is marked 3 to find 3 cylinder and plug.

_________________
poverty forces one to do unorthodox things

2000 SSEi
past rides:
1996 SSEi
1992 GTP
1987 Grand Am


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 Post subject: Re: Code 0303
PostPosted: Tue May 29, 2018 2:15 pm 
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Certified Bonneville Nut
Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
Posts: 8946
Location: Chicago, IL
Year and Trim: 2003 SLE
You can always move the coils around and see if the misfire follows, same goes for similar length wires.

_________________
-Car Guy Carl
"Penelope" - 2003 SLE - 180k Miles
"Sydney" - 2000 Honda S2000 - 57k miles
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 Post subject: Re: Code 0303
PostPosted: Fri Jun 01, 2018 8:45 am 
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SLE Member
SLE Member

Joined: Wed Apr 15, 2015 8:39 am
Posts: 74
Location: Ira, MI
Year and Trim: 2001 Bonneville
I ohmed the wire on cylinder number 3 and it read infinity. Swapped it out and miss is gone.

Thanks.


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 Post subject: Re: Code 0303
PostPosted: Fri Jun 01, 2018 9:39 am 
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Certified Bonneville Nut
Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
Posts: 8946
Location: Chicago, IL
Year and Trim: 2003 SLE
Good to hear!

_________________
-Car Guy Carl
"Penelope" - 2003 SLE - 180k Miles
"Sydney" - 2000 Honda S2000 - 57k miles
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