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Old 02-29-2008, 11:41 PM   #1
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Idling strange = check engine light?

So, the check engine light has been intermitently coming on. Its been going on for a few months now and I've been listening, feeling, looking, even smelling to see if something really is wrong.

Well, the other day I was sitting at a red light idling when all of a sudden it kind of "down idled" (dont know the technical term for it) and the check engine light popped on.

What could be causing this?

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Old 03-01-2008, 01:45 AM   #2
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go to autozone and see if you can pull out something from the memory since they should do it for free with their scanners.

any other symptoms? rough idle or something like that?

My tj has dropped the rpms down to 300ish but it didnt feel like the engine was going rough.. just the rpm meter dropped (only)

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Old 03-01-2008, 06:32 AM   #3
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It is really worth the investment for one of the code readers, I've seen them down to $50 lately. I have one of the acctrons I bought about 4 years ago that has paid for itself just with peace of mind when the light comes on. I'm going to pick up two of the mini ones to add to both TJ's tool kits so they are in there all the time.
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Old 03-01-2008, 09:21 AM   #4
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Quote:
Originally Posted by richp View Post
It is really worth the investment for one of the code readers, I've seen them down to $50 lately. I have one of the acctrons I bought about 4 years ago that has paid for itself just with peace of mind when the light comes on. I'm going to pick up two of the mini ones to add to both TJ's tool kits so they are in there all the time.
what do you scan?
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Old 03-01-2008, 10:03 AM   #5
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what do you scan?
Look under to the left of your steering wheel, under the dash, there is a plug under there, kinda looks like a parallel printer lpt plug, scanner goes in there, read the onboard computer and allows you to scroll thru errors and such. It also allows you to reset the CEL.
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Old 03-01-2008, 10:18 AM   #6
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what do you scan?
It sees what your ECU sees.. stored check engine codes.. etc
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Old 03-01-2008, 12:38 PM   #7
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just swing into the autozone like trip said there should be one right down the way on TV highway.

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