My son did and now his car idles ruff until it warms up. 
Running very rough..no code shown..loosing spark?
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
Running very rough..no code shown..loosing spark?
Ok what I have is the cars seems like its running on 6 or 7 cyclinders. I was driving a week about 30 mph and all the sudden it kinda backfired and it sounded bad so I pulled over. It will still start but it like I lost timing or not firing on all cyclinders. Is there a scan that may tell me whats going on?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
How are you reading the DTCs. Are you using the DTC reading routine built into the IPC?
Do you shut the engine down and then read them?
When the engine runs bad, read the codes immediately without shutting the engine down. If its missing on any cylinders, you should see P-0300 DTCs
Do you shut the engine down and then read them?
When the engine runs bad, read the codes immediately without shutting the engine down. If its missing on any cylinders, you should see P-0300 DTCs
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
How are you reading the DTCs. Are you using the DTC reading routine built into the IPC?
Do you shut the engine down and then read them?
When the engine runs bad, read the codes immediately without shutting the engine down. If its missing on any cylinders, you should see P-0300 DTCs
Do you shut the engine down and then read them?
When the engine runs bad, read the codes immediately without shutting the engine down. If its missing on any cylinders, you should see P-0300 DTCs
Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
Tech Contributor
Joined: Jan 2007
Posts: 19,353
Likes: 1,125
From: Dyer, IN
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
OK here is what I found...I do have some issues with the traction control...but it shuts off as soon as I start the car. It has been doing that for some time now but the car always ran fine. I did have a PCM code P0101C and that is ( P0101 Mass Air Flow (MAF) System Performance )
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Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Ok,,,,first thing that I would do is examine the air ducting between the MAF and Throttle Body and make sure that there are not any leaks.
Check the connector and the wiring on the MAF and make sure that its in good condition.
I would also clean the MAF with MAF cleaner. I use Brake Parts cleaner and it works fine for me.
After the MAF is clean and tight, clear the DTCs and give her a test drive.
MAFs do go bad
BC
Check the connector and the wiring on the MAF and make sure that its in good condition.
I would also clean the MAF with MAF cleaner. I use Brake Parts cleaner and it works fine for me.
After the MAF is clean and tight, clear the DTCs and give her a test drive.
MAFs do go bad
BC
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
Ok,,,,first thing that I would do is examine the air ducting between the MAF and Throttle Body and make sure that there are not any leaks.
Check the connector and the wiring on the MAF and make sure that its in good condition.
I would also clean the MAF with MAF cleaner. I use Brake Parts cleaner and it works fine for me.
After the MAF is clean and tight, clear the DTCs and give her a test drive.
MAFs do go bad
BC
Check the connector and the wiring on the MAF and make sure that its in good condition.
I would also clean the MAF with MAF cleaner. I use Brake Parts cleaner and it works fine for me.
After the MAF is clean and tight, clear the DTCs and give her a test drive.
MAFs do go bad
BC
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Yes, if the MAF goes bad, it'll run real bad. Also, you could possibly have a bad O2 sensor, therefore plugs on one side might be clean and the other side they could be messed up.
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
So it would still start? And with the code I got P0101 C is that tell you its bad or what? And is MAF expensive?
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
P0101 Mass Air Flow (MAF) System Performance. Sounds like it went bad or is dirty. You can extract it and spray it out with either electrical parts cleaner or similar, but don't touch the element inside. I haven't priced them lately but they aren't cheap but not beyond a reasonable price either. Check on www.gmpartshouse.com
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
P0101 Mass Air Flow (MAF) System Performance. Sounds like it went bad or is dirty. You can extract it and spray it out with either electrical parts cleaner or similar, but don't touch the element inside. I haven't priced them lately but they aren't cheap but not beyond a reasonable price either. Check on www.gmpartshouse.com
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
OK back at it again....removed the MAF and cleaned it with brake cleaner...now when I started it the code Im getting is P0135 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 1.....what the hell is that? Is it a o2 sensor?
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From: Fort Wayne IN
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That is a front O2 sensor and will definitely cause your car to run poorly. Inspect the wiring for the O2 to ensure that nothing is chaffed, grounding out, melted, ect, and if all comes back good, replace the O2.
