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Old 03-02-2011, 09:13 AM   #1
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Locking gas cap?

Does anyone have any suggestions for a good locking gas cap? After having the gas stolen out of my Jeep twice, I got a locking gas cap from Advance and put it on. Well, apparently it doesn't seal correctly, and now I'm having idling issues and getting check engine lights. I know Jeep makes a gas cap that locks, but it's ridiculously expensive.

I had thought about something like this - Rugged Ridge 11425.08 - Rugged Ridge Locking Gas Hatch Cover in Black Painted Aluminum for 97-06 Jeep® Wrangler TJ & Unlimited - Quadratec - but I'm not sure how well they work.

Any suggestions?

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Old 03-02-2011, 09:20 AM   #2
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Don't buy one = garbage... Mine froze in the winter then I lost the key. Well a rock solved that problem, broke in 8 pieces and came right off.. consider an alarm system.

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Old 03-02-2011, 09:42 AM   #3
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got a locking cap from autozone, had no problems so far.
Its my dd
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Old 03-02-2011, 09:48 AM   #4
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Quote:
Originally Posted by zimi117
got a locking cap from autozone, had no problems so far.
Its my dd
Same, I'm just saying, maybe a good deterrent but if someone wants your gas they are easy to break and remove.

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Old 03-02-2011, 10:09 AM   #5
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Quote:
Originally Posted by zimi117 View Post
got a locking cap from autozone, had no problems so far.
Its my dd
Do you know what brand it was?

Quote:
Originally Posted by kjeeper10 View Post
Same, I'm just saying, maybe a good deterrent but if someone wants your gas they are easy to break and remove.

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Well, if someone wants gas that badly, I don't think anything is going to stop them. I think they just saw it sitting there and saw an easy target. Actually, I think it was one of my neighbors, but I can't prove it.

An alarm isn't in the budget right now anyways...
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Old 03-02-2011, 10:13 AM   #6
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Why not a fuel door with lock? Since you are going to spend some $ why not make it a good excuse to justify another mod?

Something like this:

http://www.quadratec.com/products/15006_601.htm

or this:

http://www.quadratec.com/products/15006_600.htm
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Old 03-02-2011, 10:13 AM   #7
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A question... how is a thief stealing gas from your tank? There is a baffle inside the fill neck that prevents gasoline from being siphoned out. I have tried but cannot get a hose down inside to siphon gasoline out of my tank.
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Old 03-02-2011, 10:19 AM   #8
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Quote:
Originally Posted by wachuko View Post
Why not a fuel door with lock? Since you are going to spend some $ why not make it a good excuse to justify another mod?

Something like this:

http://www.quadratec.com/products/15006_601.htm

or this:

http://www.quadratec.com/products/15006_600.htm
Yeah, I posted about that in my first post. I just don't have any experience with them, so I don't know how they fit or how durable they are.

Quote:
Originally Posted by Jerry Bransford View Post
A question... how is a thief stealing gas from your tank? There is a baffle inside the fill neck that prevents gasoline from being siphoned out. I have tried but cannot get a hose down inside to siphon gasoline out of my tank.
I don't know. I didn't see it happen. But, twice I've gone to bed with close to a half tank of gas and gone out the next morning and it's empty. It's just me and my wife, so it's not a case of the kids sneaking out and going joy riding all night.
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Old 03-02-2011, 10:26 AM   #9
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Cool

Quote:
Originally Posted by Cosmo420 View Post
Yeah, I posted about that in my first post. I just don't have any experience with them, so I don't know how they fit or how durable they are...
opps... I need to read better...

The fit is great. I just installed one on my friend's Jeep. Not sure about durability as he just got it. But anything that might make the thief go through more trouble might have him move to the next car...

Or you can drop a few empty 9mm or . 45 shells on the driveway and see if that sends a message...

Good luck!
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Old 03-02-2011, 10:38 AM   #10
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BTW Evaporative system leaks i.e. gas cap not sealing are not going to cause idle issues
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Old 03-02-2011, 10:40 AM   #11
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Quote:
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BTW Evaporative system leaks i.e. gas cap not sealing are not going to cause idle issues
That was my thought as well. But, we'll see if it still does it after switching the cap back.
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Old 03-02-2011, 11:03 AM   #12
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Get an OEM locking gas cap from moparpartsamerica and call it a day. Don't waste time and money dealing with the crappy AZ caps trust me, I spent triple the cost of getting an OEM by dealing with them
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Old 03-02-2011, 11:12 AM   #13
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I have a a locking gas cap from the factory that uses my ignition key to unlock. Works very well. As far as the half tank then the next morning find it near empty, I believe it has something to do with how the computer interprets signals from the tank level indicator in the fuel tank. I have parked mine for the night before at close to a half tank and found it closer to empty the next morning. I know nobody was stealing from the gas tank because 1) its parked in my locked garage overnight and 2) like Jerry said it is pretty much impossible to siphon fuel from a modern tank nowadays. I tried something once parked the Jeep and turned it off with the indicator right on 3/4. Sat for a few seconds turned the key back on and the indicator was directly between 3/4 and 1/2 tank. Like I said I think it is just the way the computer interprets signals from the level indicator in the tank.
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Old 03-02-2011, 11:17 AM   #14
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Stant Products 431-10591 - Stant Locking Fuel Caps - Overview - SummitRacing.com

I have this, works great for now. Eventually want to do a locking fuel door, love the look of them.
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Old 03-02-2011, 12:38 PM   #15
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Quote:
Originally Posted by Rubicon2 View Post
I have a a locking gas cap from the factory that uses my ignition key to unlock. Works very well. As far as the half tank then the next morning find it near empty, I believe it has something to do with how the computer interprets signals from the tank level indicator in the fuel tank. I have parked mine for the night before at close to a half tank and found it closer to empty the next morning. I know nobody was stealing from the gas tank because 1) its parked in my locked garage overnight and 2) like Jerry said it is pretty much impossible to siphon fuel from a modern tank nowadays. I tried something once parked the Jeep and turned it off with the indicator right on 3/4. Sat for a few seconds turned the key back on and the indicator was directly between 3/4 and 1/2 tank. Like I said I think it is just the way the computer interprets signals from the level indicator in the tank.
If that's the case, then there must be something seriously wrong with the computer. Both times I've put $20 in gas in it after it happened, and then the gauge read 1/2 tank.
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Old 03-02-2011, 12:54 PM   #16
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I've had this one for 5 years now and never had a problem with it. Easy install and no drilling.

Rugged Ridge 11425.02 - Rugged Ridge Billet Gas Cap Cover in Black Powder Coat for 97-06 Jeep® Wrangler TJ & Unlimited - Quadratec
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Old 03-02-2011, 12:59 PM   #17
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Quote:
Originally Posted by Rubicon2 View Post
I have a a locking gas cap from the factory that uses my ignition key to unlock. Works very well. As far as the half tank then the next morning find it near empty, I believe it has something to do with how the computer interprets signals from the tank level indicator in the fuel tank. I have parked mine for the night before at close to a half tank and found it closer to empty the next morning. I know nobody was stealing from the gas tank because 1) its parked in my locked garage overnight and 2) like Jerry said it is pretty much impossible to siphon fuel from a modern tank nowadays. I tried something once parked the Jeep and turned it off with the indicator right on 3/4. Sat for a few seconds turned the key back on and the indicator was directly between 3/4 and 1/2 tank. Like I said I think it is just the way the computer interprets signals from the level indicator in the tank.
i asked the dude that sold me this jeep about a locking gas cap that uses the ignition key, he said he never heard of it,

so there is one, how do i get one...
that would be so much better,
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Old 03-02-2011, 01:23 PM   #18
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The gas cap on my 98 went missing, but we decided against a locking cap.

I just didn't wanna deal with the hassle if the cap ever broke.
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Old 03-02-2011, 02:00 PM   #19
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Originally Posted by NEWWRANGLEROLDCJ7 View Post
i asked the dude that sold me this jeep about a locking gas cap that uses the ignition key, he said he never heard of it,

so there is one, how do i get one...
that would be so much better,
It's available from the factory, and I think several aftermarket places make them as well. Although, after doing research on them, it seems many people are having the same problem with them as I am with mine.

Sounds like the locking fuel door thing may be the way to go.
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Old 03-02-2011, 02:04 PM   #20
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I must have gotten lucky, I got my locking cap from Ebay, cheapest one I could find after I lost a full tank of gas to someone in Philidelphia. (Left a concert after a long night only to be out of gas in the wrong part of the city, UGH!) Anyway, back to the gas cap. Ebay, cheapest one on there, once in a while the gas station guy (we can't pump our own gas here in NJ) doesn't put it on tight and the CEL comes one, I juse redo. Other than that, no problems at all, going on three years on this cap.
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Old 03-02-2011, 02:24 PM   #21
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Originally Posted by Cosmo420 View Post
I don't know. I didn't see it happen. But, twice I've gone to bed with close to a half tank of gas and gone out the next morning and it's empty. It's just me and my wife, so it's not a case of the kids sneaking out and going joy riding all night.
No puddles on the ground? Maybe a leaking tank?
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Old 03-02-2011, 02:28 PM   #22
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No puddles on the ground? Maybe a leaking tank?
No. It only happened twice in the 4 months that I've owned it. First time I thought that maybe I looked at the gauge wrong before I got out, and it had less than I remembered. But a week or so later I stopped at the gas station on my way home and put gas in it. The next morning it was empty. This was before Christmas. I haven't had the "missing gas" problem since I got the locking cap.
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Old 03-02-2011, 02:35 PM   #23
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I wasn't as worried about stolen gas as I was that someone might decide to add something to the gas. And yes, they are just a deterrent, but it keeps the casual trouble-maker at bay. As long as I don't leave it on top of the gas island, I've had no trouble with it. I believe it was a Stant from Autozone. Hasn't frozen up yet either and I've had this one over two years now. I do make certain to screw it down really tight as it was loose once and the dash light came on.

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Old 03-02-2011, 02:36 PM   #24
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Quote:
Originally Posted by Jerry Bransford View Post
A question... how is a thief stealing gas from your tank? There is a baffle inside the fill neck that prevents gasoline from being siphoned out. I have tried but cannot get a hose down inside to siphon gasoline out of my tank.
It is very easy to shove a hose into our tanks to siphon gas out. I use a funnel all the time to prop it open to add a fuel additive or pour seafoam into the tank. all you would need is a piece of 1/2" OD hose I believe, probably about 5-6' long and a gas can to siphon into.

P.S. Biodiesel does not taste like french-fries and does some pretty bad things to your intestines. Think exlax...
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Old 03-02-2011, 02:36 PM   #25
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Originally Posted by Gee oh Dee View Post
The gas cap on my 98 went missing, but we decided against a locking cap.

I just didn't wanna deal with the hassle if the cap ever broke.
Mine had the locking cap that uses the vehicle key to open...What a PITA.

The locking mechanism started to go. When it was taking me and the attendant 5 mins to get the damn thing off, I did the smart thing and bought the $10 generic non-locking cap from Autozone.

3 months later and all it is well.
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Old 03-02-2011, 04:15 PM   #26
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I have the rampage powder coated locking door with the factory gas cap. Works great untill I get snow or ice and then its a battle trying to get it off.
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Old 03-02-2011, 04:15 PM   #27
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I had a funny story the other day. My gas was stolen out of my Jeep about a year ago, so I bought a locking gas cap at Target, works great. Well I live in the mountains of Colorado and am always getting snow in the Jeep, well the other day it was really cold and I went to get the key out from under the mat, well the mat had cracked and the moister got between the mat and the carpet and was frozen I couldn't get the mat to let go of the carpet. I mean I was really pulling, it started lifting up the carpet. So finally I took my good to 30 below washer fluid and poured alittle on the carpet where it met the mat and it let go. From now on the key goes in the never used ash tray.
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Old 03-02-2011, 04:18 PM   #28
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I had a funny story the other day. My gas was stolen out of my Jeep about a year ago, so I bought a locking gas cap at Target, works great. Well I live in the mountains of Colorado and am always getting snow in the Jeep, well the other day it was really cold and I went to get the key out from under the mat, well the mat had cracked and the moister got between the mat and the carpet and was frozen I couldn't get the mat to let go of the carpet. I mean I was really pulling, it started lifting up the carpet. So finally I took my good to 30 below washer fluid and poured alittle on the carpet where it met the mat and it let go. From now on the key goes in the never used ash tray.


why not just keep it on you key ring? thats where i keep mine.
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Old 03-02-2011, 04:20 PM   #29
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Because its hole is to small and I just didn't really think of it. I like challenges, I own a Jeep, Mini Cooper and a 65 Vette. What can I say
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Old 03-02-2011, 04:25 PM   #30
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thats a nice stable of vehicles. Jeep for offroading, mini for the city, and vette for speeding

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