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Baja Forums -:- VW Volkswagen Bug, Baja, Bus, Sandrail and Thing -:- VW Volkswagen & Baja Bug General Discussion -:- running crappy, then running good.
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running crappy, then running good.
Bug, Baja, Thing and Buggies. Most every thing that will not fit any any other area. See list of other Forums for better topic placement...Volkswagen General Discussion
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shpuz
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Post Post subject: running crappy, then running good.
Posted: Tue Feb 12, 2008 07:12 PM
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i have a question. my baja isnt running right, but ever once and a while it runs perfectly. it does this on its own. yesterday i cleaned the carb, started it up, and it ran PERFECTLY. drove it around for a while, and parked it for a few hours. went to drive it again, and it was running like crap again. whats causing this? when its running bad, it will backfire out of the carb at low RPM. then, for no apparent reason, it runs fine for a while. im stumped. any ideas?


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I still don't understand how the muffler bearings enhance the performance of the cupholders...
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fatalifeaten
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Post Post subject: Re: running crappy, then running good.
Posted: Tue Feb 12, 2008 07:40 PM
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how do your plugs look? Also, are your wires all in good shape, and there's not any thing grounding oddly?


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az350x
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Post Post subject: Re: running crappy, then running good.
Posted: Tue Feb 12, 2008 07:52 PM
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I'd drain and replace the fuel first, just to eliminate it as suspect.


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shpuz
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Post Post subject: Re: running crappy, then running good.
Posted: Tue Feb 12, 2008 09:00 PM
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fatalifeaten wrote:
how do your plugs look? Also, are your wires all in good shape, and there's not any thing grounding oddly?

plugs and wires are brand new and everything seems to be grounded properly.


and how could it be the fuel? i replaced the fuel filter a few weeks ago and its still clean, so from what i can see the fuel insnt dirty or anything.


im taking it to the shop thursday, so id like to get it fixed before i have to pay someone els to figure it out Very Happy


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I still don't understand how the muffler bearings enhance the performance of the cupholders...
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Leatherneck
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Post Post subject: Re: running crappy, then running good.
Posted: Tue Feb 12, 2008 09:44 PM
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Bring the rpms up to say 2k then put your hand over the carb throat at the same time open it up all the way, it should chug out (die) restart it, you might have some junk in the jets.

Also did you clean the filter in the carb? How old are your fuel lines, could be getting deteriorated fuel line coming through.

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Post Post subject: Re: running crappy, then running good.
Posted: Tue Feb 12, 2008 10:06 PM
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Could be getting a slug of water through it from time to time, if you picked up some bad gas somewhere recently. That's what I was getting at. If you've got a visible fuel filter, and it sits low in the system, I guess you'd be able to see if there's any water collecting in the filter.


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oldfart
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Post Post subject: Re: running crappy, then running good.
Posted: Wed Feb 13, 2008 12:00 AM
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if you still have points/condenser, I'd suspect the condenser...starts cutting out when hot. Also, if it is a external mount condenser(outside of the distributor), check to make sure it is tightly screwed to the dist. housing. I chased down a intermittent cutout/poor running problem for about 100 years(seemslike)...condenser screw was loose....
course if you have electronic distr. ......just consider my advanced age.


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shpuz
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Post Post subject: Re: running crappy, then running good.
Posted: Wed Feb 13, 2008 01:02 AM
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i think i may have found the problem. air leak. my little "home made" intake sleeve thing sprung a leak. a little flap of it tore loose and is letting air in, but it didnt completely rip off, so my guess is that the little flap that came loose plugs up the hole every once and a while, making it run good. i ordered some actual intake sleeves off of chirco, along with a bunch of other stuff. im broke now Sad lol.


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I still don't understand how the muffler bearings enhance the performance of the cupholders...
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shpuz
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Post Post subject: Re: running crappy, then running good.
Posted: Wed Feb 13, 2008 07:30 AM
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so could that be causing it or not? as far as i could see, when i plugged the hole with my hand it didnt sputter like it did before.


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Sample
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Post Post subject: Re: running crappy, then running good.
Posted: Wed Feb 13, 2008 08:22 AM
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Duct tape it and see.


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Post Post subject: Re: running crappy, then running good.
Posted: Thu Feb 14, 2008 12:07 AM
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that'd do it, Personally, I wouldn't drive it like that.


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seabeebuggy
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Post Post subject: Re: running crappy, then running good.
Posted: Thu Feb 14, 2008 01:42 AM
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I dont know what carb you using but if it is a weber. I say your idle jet is pluged.

No way I am a recruit again. I hate the thought. Smile

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shpuz
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Post Post subject: Re: running crappy, then running good.
Posted: Thu Feb 14, 2008 02:17 AM
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yup. taped it up and runs fine. i have new ones coming, but the tape will hold for now.


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