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Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

sputtering on acceleration

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Old 10-21-2021, 04:35 PM
dravid's Avatar
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Default sputtering on acceleration
hello all I have a 2007 h3 with the 3.5 I5 its starting to sputter on accelaration any ideas as to what may be the issue
 
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Old 10-21-2021, 05:10 PM
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Any codes? If not, start by checking fuel pressure, inspect spark plugs, check air filter & clean maf sensor.
 
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Old 10-22-2021, 10:17 AM
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Review the linked H3 FAQ section thread about what to do if running rough with no codes. 07s have the 3.7L.

Acts like it wants to stall/rough idle -No CEL -What To Do:
 
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