It is currently Thu Aug 16, 2018 7:35 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: P0300 now.
PostPosted: Mon Jan 01, 2018 7:09 pm 
Offline
SLE Member
SLE Member
User avatar

Joined: Tue Dec 04, 2012 8:33 pm
Posts: 31
Location: Meadville, Pa
Year and Trim: 2005 Bonneville SLE
well earlier I thought I might have had a trans problem with it chugging under load. I had 0 codes , nothing even in the history. yesterday however, I managed to get a p0300 and a misfire on cyl #4. So I put all new ac delco iridium plugs in it 41-101. I pulled all the coil packs off the ICM and checked the connectors for any kind of debris. made sure the blades out of the icm were clean and then I put a little dielectric grease on them. put it all back together and it cleared out the misfire right away. Or so I thought. took it out and soon as I hit 1600 rpms under a load it just sputtered, through a check engine and then it went to a blinking check engine light. when I got it back home and rescanned it, all I got was a p0300 random misfire. thought while I was in there i'd clean the MAF so I carefully removed it, it looked ok, but I lightly sprayed it with CES MAF cleaner , let it dry and then reinstalled it. took the car for another run and still the same thing. I did smell something hot under the car and figured it was the Cat Conv. so I unbolted the cat and it seems to be clear. I had a spare Cat from my other Bonneville that was scrapped so I put it on to test it out. this Cat was cleaned out, no ceramic in it.. just a empty cat. this is how I wanted to see if it was a cat issue being plugged. well it made no difference as well. Tomorrow i'm going to try some of the simple things, like check for vacuum leaks, make sure there isn't a squirrel making a home in the air box, ect... Kinda taking guesses at this point. at idle it doesn't miss a beat.


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Mon Jan 01, 2018 8:44 pm 
Offline
Posts like an LG3
Posts like an LG3
User avatar

Joined: Tue Oct 19, 2010 7:45 am
Posts: 309
Location: New York
Year and Trim: 2004 Bonneville SE
Did you also try running it with the MAF disconnected? Sometimes a faulty MAF can cause driveability issues

_________________
2004 Bonneville SE 151,xxx- 20% tint all around, 5% tint bar on windshield | 4500k DDM HID low | De-badged | Hardwired Passport 9500ix | FWI(inter-cooler piping) | FE2 Rear Sway Bar | Solid Motor Mount | 180* Stat | Firm Shift Kit

My old car(now brother's car) 1998 Bonneville SE 230,xxx- 20% tint all around
Other cars in family(only the Pontiacs)
- '92 Bonneville SE - '85 Grand Am - '73 Catalina - '67 Catalina
- '87 Bonneville SE - '82 6000 - '78 Catalina


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Mon Jan 01, 2018 9:05 pm 
Offline
Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1550
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
you didnt mention the wires - did you check them? does your scan tool have freeze data of the code?

_________________
poverty forces one to do unorthodox things

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


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Mon Jan 01, 2018 10:22 pm 
Offline
SLE Member
SLE Member
User avatar

Joined: Tue Dec 04, 2012 8:33 pm
Posts: 31
Location: Meadville, Pa
Year and Trim: 2005 Bonneville SLE
I have not fully checked the wires. I did however look for a short in them. in the dark while running it with the engine cover off, I checked for any arcing. moved wires all over, made no difference. and they were replaced 2 years ago.
on the Maf though, I have not tried it unplugged. ( makes a note to run that tomorrow )


and the scan tool I was using at the time was a actron, not near the quality of the ones i'm use to using. but to answer that, no freeze data. My Solus Pro has been broken for 2 weeks. Snap-on has it and who knows when i'll get it back from repair. he keeps saying, I need to upgrade blah blah..


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Mon Jan 01, 2018 10:32 pm 
Offline
Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1550
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
for the wires, get a spray bottle of water and spray a mist and you will see arcing if they bad

_________________
poverty forces one to do unorthodox things

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


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Tue Jan 02, 2018 9:51 am 
Offline
Posts like an L67
Posts like an L67

Joined: Thu May 01, 2014 9:37 pm
Posts: 1277
Year and Trim: 1993 SLE
1998 SE
2001 SSEI
2002 SSEI
96 SSEi wrote:
for the wires, get a spray bottle of water and spray a mist and you will see arcing if they bad


x2
2 years would be a rather short time, but you never know...
a wire could have rubbed against the dipstick tube or manifold and damaged the insulation.

Without the ability to look at live data, it's surely a more difficult task.

Typically a miss under load is an ignition system breakdown.
Bad coils are not uncommon and of course the ICM might be on its way out.
I'd invest in at least 1 coil or coil and ICM from Harofreak00 (aka Andrew) or from your local junkyard.
With today's lack of QC, new isn't always better.
ACDelco will be the brand to buy if you do decide on new.

It would be wise to also check fuel pressures and, if not done in recent memory, change the fuel filter.


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Fri Jan 19, 2018 9:08 am 
Offline
SLE Member
SLE Member
User avatar

Joined: Tue Dec 04, 2012 8:33 pm
Posts: 31
Location: Meadville, Pa
Year and Trim: 2005 Bonneville SLE
Just a update sorry it has been a while. dad passed away from cancer and so the SLE was put on hold. In any rate, yesterday I bought a ICM with new coil packs, installed them in minutes. crazy how easy they were to install. and seems to have cured all the problems. car runs fine, no missing, no bucking or anything. I don't drive it every day, but it sure makes me smile to know I can count on her again. such a beautiful car. GM shoulda killed Buick not Pontiac. Love my Bonneville. ok sorry to the Buick people..


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Fri Jan 19, 2018 12:04 pm 
Offline
Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1550
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
nice!, good you have her running as the gm engineers intended. sorry to hear of your loss: my sympathy

was the car originally your dad's? hand me down?

_________________
poverty forces one to do unorthodox things

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


Top
 Profile  
 
 Post subject: Re: P0300 now.
PostPosted: Fri Jan 19, 2018 12:13 pm 
Offline
Posts like an L67
Posts like an L67

Joined: Thu May 01, 2014 9:37 pm
Posts: 1277
Year and Trim: 1993 SLE
1998 SE
2001 SSEI
2002 SSEI
Very sorry for your loss.

Thanks for posting back. Glad to hear the SLE is running well again.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours [ DST ]


Related topics
 Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. P0300

ThatThar

17

1110

Sat May 16, 2015 12:31 am

MKMike View the latest post

There are no new unread posts for this topic. P0300 on 2001

mtmmaster

3

2612

Fri Jun 08, 2012 2:01 am

dkc View the latest post

There are no new unread posts for this topic. NEED HELP! CRANK NO START! P0300

EXLINE

10

1849

Fri Jan 18, 2013 6:45 pm

EXLINE View the latest post

There are no new unread posts for this topic. code p0300 misfire

1997SEgreenmonster

12

5331

Fri May 24, 2013 2:05 pm

Trinity View the latest post

There are no new unread posts for this topic. Missing and a p0300 code.

Rubidon

6

931

Fri Jan 30, 2015 5:58 pm

Rubidon View the latest post

 


Who is online

Users browsing this forum: Google [Bot] and 11 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group


phpBB SEO