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PostPosted: Thu Jan 04, 2018 11:38 am 
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Joined: Thu Dec 21, 2017 6:51 pm
Posts: 4
Year and Trim: 2005 Bonneville SE
I recently bought a 2005 Bonneville SE with 121k miles. It always starts up great in the mornings and after work if it sits all day. Sometimes when I park it for a short period of time (up to 2 hours sometimes), it starts up but is sputtering for about 5-10 seconds, then it catches and runs great. I usually give it some gas and it comes out of it. I cleaned the throttle body and MAF sensor last week and it has improved, only done it a couple time in a week. I bought a Fuel Pressure Regulator and was going to install it but tested the other one and didn't smell any gas when pulling the vacuum line. It also looks like it has been replaced before. Any other simple ideas to check for or if anyone else had this issue and what was done to correct it. Thanks.


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PostPosted: Thu Jan 04, 2018 12:44 pm 
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Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1485
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
welcome to the club!!

since you just got it, I would inspect/change: spark plugs, wires, air and fuel filters. I would also do an oil change just to get a starting point.

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poverty forces one to do unorthodox things

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


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PostPosted: Thu Jan 04, 2018 6:31 pm 
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Joined: Thu Dec 21, 2017 6:51 pm
Posts: 4
Year and Trim: 2005 Bonneville SE
I've done all of that, including dropped the transmission pan and changed the filter. Also replaced the Intermediate Steering Shaft and cabin filter


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PostPosted: Fri Jan 05, 2018 8:11 am 
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SSE Member
SSE Member

Joined: Tue Jan 07, 2014 4:21 pm
Posts: 105
Year and Trim: 2003 SSEi
1999 Park Ave. Ultra L67
Does the car lose coolant?


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PostPosted: Fri Jan 05, 2018 1:35 pm 
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Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1485
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
since you state it improved after maf cleaning, I would try unplugging the maf and leave it unplugged for a day or 2 and see what happens - it is old, it may be on the way out.

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poverty forces one to do unorthodox things

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


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PostPosted: Mon Jan 08, 2018 10:59 am 
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Joined: Thu Dec 21, 2017 6:51 pm
Posts: 4
Year and Trim: 2005 Bonneville SE
maxi426 wrote:
Does the car lose coolant?

Nope!


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