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2002 Tahoe engine will not start

Hi Folks,
Recent problem with troublie free 2002 Tahoe with 68k miles. When I turn the ignition key, the starter cranks, but will not turn over the engine. All dash indicator lights are on, just no engine running. This will happen 2-3 times (dash indicators on, starter cranks, no engine start). Then on the 3-4 try, the engine will catch and start up. The problem is getting worse (more frequent). Also, on a couple of times this has happened, the dash board indicator lights will go completely out, after the starter cranks (without the engine starting). But here is a clue. On some of the the times where the dash indicators go completely dark (after starter cranks with no engine start), the dash board clock resets to 1:00. Now, the only time I've seen a dash board clock reset is when you take out the battery. I replaced the battery, and everything else seems normal. All electical systems work with the engine running, or when using the battery. Please provide any diection you can.

Thanks very much!
Kind Regards,
Jim from Maryland.

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Electrical problems are difficult to diagnose in person without testing ...however, it seems that you may be loosing the body ground, causing power loss to the clock and likely the computer as well. As the starter is able to turn the engine, likely there is no problem with engine grounding. While cranking, the accessory side of the ignition switch should remain "hot" otherwise you would loose the clock every time you started it up. If it's not a ground problem, I'd look at the ignition switch itself to make sure it's not dropping power to ignition system while starter is engaged. on some vehicles this can also happen at the starter relay if an ignition bypass is used to provide hotter starting spark.

Posted on Jun 28, 2009

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Posted on Jan 02, 2017

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