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post #1 of (permalink) Old 12-17-2002, 05:12 PM Thread Starter
 
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check engine light with loose gas cap?

i know in many newer vehicles the check engine light will come on if you dont tighten your gas cap all the way down. well over the past week in my 93 samurai i had my check engine light come on and go back off and today realized my gas cap was loose, real loose. could this have been the problem?
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post #2 of (permalink) Old 12-17-2002, 09:16 PM
 
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Re: check engine light with loose gas cap?

Hey...Instead of posting the same question over and over why dont you just bump the original post to the top [img]images/graemlins/tongue.gif[/img]

I know this is atleast the second or third time you have asked the same question [img]images/graemlins/crazy.gif[/img]
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post #3 of (permalink) Old 12-17-2002, 11:31 PM
 
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Re: check engine light with loose gas cap?

It was only posted twice, one minute apart, which can easily happen if the board is slow to respond and you click twice.
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post #4 of (permalink) Old 12-18-2002, 02:40 AM
 
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Re: check engine light with loose gas cap?

ya this actually just happened to my girlfriends car. im not sure if obd 1 would do this though. i thought only obd2 cars did this. anyone know?
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post #5 of (permalink) Old 12-18-2002, 02:55 AM
 
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Re: check engine light with loose gas cap?

It's much, much more likely in an OBD2 car. OBD2 has a sequence to test the vapor purge system for leaks (which could be caused by a loose gas cap.)

On an older system, you would need a big enough leak to cause a lean condition (due to too much air being sucked in)
The chance are probably pretty slim (you'd probably have to leave the cap all the way off and/or have a cracked hose somewhere), but the possibility does exist.

Here's a good article on the subject: http://www.canadiandriver.com/articles/jk/020116.htm
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