My hummer sometimes will not start like it doesn't want to fire up. Wait 10 min and it starts.


Asked by stingerh3 Oct 22, 2012 at 03:03 PM about the 2007 Hummer H3

Question type: Maintenance & Repair

maybe is the fuel pump

12 Answers

Michael Kane

I would say the fuel pump is a good place to start. sounds like its not building up good fuel pressure.

3 out of 3 people think this is helpful.
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John Leone

to test the fuel pump/filter, have the truck off, then turn the key to acc/lights come on, but not the engine, some models you will hear a low gurgle sound, for a few seconds, turn the key off, then repeat the process again, then off, then start it, to see if the system is just needing more pressure to be primed...

9 out of 9 people think this is helpful.
Tracy Dial-Tipton

My 2006 hummer h3 is doing the SAME thing, did you find out what was wrong with yours??

12 out of 12 people think this is helpful.

Seems to work if you sit and wait. But its a bummer as who wants to wait when you want to get going.

2 out of 2 people think this is helpful.

I Have a 2004 Hummer H2 that will not crank at times. I will drive it then put it in park sit with it running for a short period of time. Shut it down for under 5 minutes then jump in try to start it and NOTHING. Lights and all electronics come on but it will not turn over. I hear a slight scratch like sound when turning the key all the way to crank. It's not the Battery, Not the Neutral Safety switch, Not the Starter or the Starter Solenoid. But After sitting for a little while it suddenly starts. We are about to replace the key ignition itself. It like maybe something is getting hot then cooling off or something. ANY IDEAS??

12 out of 12 people think this is helpful.

Did anyone find the real reason the H3 will not start and in ten minutes starts right up...If it's a factory problem it should be a recall...

13 out of 13 people think this is helpful.
Ashley Rush

I had the same problem and they think the problem is a temperature sensor that was sending faulty readings to the computer. It was thinking that the engine was too cold and sending fuel to the motor causing it to flood.

3 out of 3 people think this is helpful.

I also have the exact same curse. It cranks and seems like the battery is working but it won't efffing start. I have to wait at least 10 minutes. What the heck is going on. Is there anybody that solved this?

8 out of 8 people think this is helpful.

I have the 2006 hummer h3 and I switched out the relay for the fuel pump number 66 with another one and she fired up.hummer was down for a few days but all good now.

3 out of 3 people think this is helpful.

It was easygoing in your engine compartment open the fuse box look At your fuse box panel diagram and find number 66 fuel pump relay switch it for now with another one with the same part number on it, your hummer should fire up with a crank no start issue.bad relay.

5 out of 5 people think this is helpful.

#66in the fuse panel switch it out for a min with maybe your rear defrost relay your hummer should fire up.

3 out of 3 people think this is helpful.

I've had the same problem for 4 1/2 years on a 2006 H3! If you wait exactly 10 minutes, it starts just fine. Had fuel pump and sensor changed. Twice! Because they thought first one was faulty since I still had the problem. Then they thought it could be the ignition and/or the passlock. Apparently, the passlock is what thinks your car is being stolen and shuts it down for 10 minutes. However, they are each $600 and no guarantee that either is the problem and the car is out of warranty. Haven't done either. Has anyone with the 10 minute thing actually found a solution???

1 out of 1 people think this is helpful.

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