What's wrong with my 98 GMC sonoma?

Jen C

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My truck will start fine when it's cold outside or it has sat for a while, but if go to the store then come back out, it usually gives me trouble starting. Sometimes it will just keep turning over for a few seconds and take right off, but sometimes I will start it, it will turn over for a couple seconds, completely shut off like the battery has been disconnected, then immediately come back on and start right up. My battery terminals are loose and I have to tighten them periodically. I just needed to know if that was the key problem or if it could have anything to do with the starter or anything else.
 
If your terminals are coming loose, you're not tightening them correctly. They're making lousy contact when they get hot. You might need new cables if the clamps are all the way closed.
 
Well I would say that one of the sensors is giving false information to the computer. I would have a Scan Tool type tool to see if or which sensors are out of limits. Although a loose battery terminal could cause a similar problem of an intermittent stalling. The point is it could be any number of things.
 


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