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 | GMC Truck Forum - GMC truck talk, etc. |
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05-01-2007, 07:15 PM
| #1 |
| Junior Member Join Date: May 2007 Location: Buffalo,NY
Posts: 1
 | 03 GMC Sonoma Rough Idle I have a 2003 GMC Sonoma with a 4.3 with 43000 miles on it that has a rough idle. I put new cap,rotor,plugs,wires and also cleaned the tbi. It runs rough at idle and runs fine going done the road. It does not make a difference if its cold or its been running for an hr at idle it runs rough. There are no codes when I check. Anyone give me some help. Thank you |
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05-02-2007, 07:37 AM
| #2 |
| Moderator  Join Date: Apr 2005 Location: Texas
Posts: 3,104
 | Might be a vacuum leak
__________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4 |
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