Question about 2007 Hummer H1
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Posted on Jan 02, 2017
you probably need a new mass air flow sensor. disconnect and drive it. I had the same problem and when I disconnected the sensor it ran good.
Posted on Jan 28, 2009
your statement is fuel pump work ok, have you tested for proper fuel pressure. just because the fuel pump works it could have less pressure needed to start the engine. maybe the fuel filter is plugged. start out by replacing the fuel filter, if this doesn't fix it, you need to pressure test the pump. even 10 psi reduction in pressure will allow the engine not to start.
Posted on Nov 05, 2009
you need to have the engine coolant switch
checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the
computer will make it a rich or lean mixture to start the engine,if it tells the
computer that it is 75 degrees the computer will lean the mixture like starting
a car in the winter without a choke.
Posted on Jan 06, 2010
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