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2006 Hummer H3 rough idle
A month back my H3 started idling rough right after I filled it up. I figured it was bad gas and put some fuel treatment in it and the problem seemed to be fixed. Then a couple weeks later it started idling rough again. After doing some research I decided to clean the throttle body. The car had some problems starting up but ran good once I started driving, but my check engine light was still on.
I had the codes ran an it came back with the following: P0014 Exhaust B Camshaft position timing - over advanced bank 1 P0016 Crankshaft position - camshaft position correlation bank 1 sensor A P0017 Crankshaft position - camshaft position correlation bank 1 sensor B P0106 Manifold Absolute Pressure / Barometric Pressure Sensor Range/performance P0300 Random - Multiple Misfire detected P0446 Evaporation Emission System Vent control circuit I'm not sure whether working on the throttle body could cause any of these codes or if those sensors need to be replaced as well. Any advice would be great. |
Search "camshaft sensor" on this forum. This and/or a faulty MAP sensor can cause a rough idle.
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Agree to start with a good cleaning of the intake area...
Then check for codes if persists. |
1 Attachment(s)
Originally Posted by ethan1893
(Post 345160)
A month back my H3 started idling rough right after I filled it up. I figured it was bad gas and put some fuel treatment in it and the problem seemed to be fixed. Then a couple weeks later it started idling rough again. After doing some research I decided to clean the throttle body. The car had some problems starting up but ran good once I started driving, but my check engine light was still on.
I had the codes ran an it came back with the following: P0014 Exhaust B Camshaft position timing - over advanced bank 1 P0016 Crankshaft position - camshaft position correlation bank 1 sensor A P0017 Crankshaft position - camshaft position correlation bank 1 sensor B P0106 Manifold Absolute Pressure / Barometric Pressure Sensor Range/performance P0300 Random - Multiple Misfire detected P0446 Evaporation Emission System Vent control circuit I'm not sure whether working on the throttle body could cause any of these codes or if those sensors need to be replaced as well. Any advice would be great. Since you have the codes now. Clear them and see what comes back. Hopefully you used TB cleaner to clean it and nothing else. Have you ever cleaned the MAF? If not, get some MAF cleaner and do it. Attachment 10630 https://images-na.ssl-images-amazon....1Ji8noySFL.jpg |
Just changed my oil and did thottle body cleaning on my 2006. Wow what a difference. I had the rough idle in the morning where I would drive to the first stop sign and it would almost want to die and idle would bounce up and down. Throttle body was really dirty. I didn't have trottlebody cleaner and the auto store I went to was also out so I used the above map sensor cleaner (cleaned that as well) along with a toothbrush. Followed the directions that I saw here and on YouTube. Now runs like a champ and no more bouncy idle. Thanks to all that post on this forum!!
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