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 Post subject: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 2:48 pm 
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Joined: Thu Jan 08, 2009 10:46 am
Posts: 6
Location: Austin, Texas
Well let me start this by saying, yes I am fully aware I made a major mistake. I had done some re-wiring, added a few new lights, etc. While doing so I had to move the battery around. (this was about a month ago) once I was done with everything I had killed the battery in the process so I threw the battery charger on the buggy and went back to working on my truck. About 1/2 an hour later I went to check on the charge and (yes I am expecting all kinds of comments from this mistake) realized in my haste and after moving the battery around I had hooked the pos to neg and neg to pos. So I had fried my battery and popped a couple of fuses in the process.

This happened about a month ago and I had moved the buggy to the back yard with the anticipation of getting to it the following weekend, normally I keep it in the shed to keep it out the elements but we were running late that day so I just moved it to the side of the house. For those of from central Texas you are aware we have had zero rain for the year. Well, until I moved the buggy to the side of house instead of into the shed like I should have and then we received about 8 inches in two weeks.

Long story short, The buggy sat outside in the weather for the last month and now I'm experiencing the following issues:
1) I can get it to start, but at WOT it bogs down
2) I can only occasionally even get it to WOT as it bogs down on the way up.
3) Runs great at idle but as mentioned in 1 and 2 that's about it.

I have checked the following:
1) Spark plug (looks to be running a bit rich) but the buggy ran great before the above happened.
2) Fuel is good, no water
3) As mentioned above I had to replace an in-line fuse that blew due to the reverse hook up on my cables
4) Connections to the coil are tight and good
5) Boot to spark plug looks good from visual inspection (any one know what it should ohm out at?)
6) Did not do a compression test but I did not smell any fuel in the oil
7) Air intake is clean and good to go.

So my questions are:
1) Is there another electrical component I could have fried due to my mistake that will make it run rough
2) Anything that sitting in the weather could have caused the miss
3) What am I missing...

Any help would be greatly appreciated.

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"Retreat, devilville we just got here"
Captain Lloyd Williams, USMC at the Battle of Belleau Wood WWI
2005 WR-450
2000 LandRover Disco fully decked for the great outdoors
2007 Baja Dune 250 - sliders, clutch springs, IPF lights, etc.


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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 2:56 pm 
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Joined: Thu Jul 30, 2009 1:01 pm
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Location: Rhode Island
I don't know what WOT is, but my guess is that the CDI box is fried. But you should wait until those more in the know respond.

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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 4:55 pm 
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Joined: Thu Jan 08, 2009 10:46 am
Posts: 6
Location: Austin, Texas
Took me awhile to figure out what WOT meant as well. Wide Open Throttle..

Interesting thing. I just went through the carb (per all the posts on buggy news on how to clean one) and now it will run as long as I have the starter engaged. If I let the key turn from starter engaged to run the motor dies.

Gawd I hate electrical problems....

Cheers

_________________
"Retreat, devilville we just got here"
Captain Lloyd Williams, USMC at the Battle of Belleau Wood WWI
2005 WR-450
2000 LandRover Disco fully decked for the great outdoors
2007 Baja Dune 250 - sliders, clutch springs, IPF lights, etc.


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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 7:08 pm 
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Posts: 4865
Location: Seattle, WA
devil_dog wrote:
Interesting thing. I just went through the carb (per all the posts on buggy news on how to clean one) and now it will run as long as I have the starter engaged. If I let the key turn from starter engaged to run the motor dies.

Your ignition switch is corroded from sitting in the rain. Replace it with a marine grade switch from a local boating supply store.

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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 7:11 pm 
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Location: Orlando, Fl.
Sounds like a bad switch to me. The cdi can cause wot problems

You type to fast Pgh :D

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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Sun Sep 27, 2009 7:21 pm 
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Location: Seattle, WA
devil_dog wrote:
So my questions are:
1) Is there another electrical component I could have fried due to my mistake that will make it run rough
2) Anything that sitting in the weather could have caused the miss
3) What am I missing...

Any help would be greatly appreciated.

1. If you turned on the ignition while the charger was incorrectly connected, There is good chance your CDI is damaged. Even if you did not, it is possible the voltage applied to ground may have damaged it.

2. Since it was sitting in the rain, you should unplug each connector and inspect it for corrosion. Before you plug it back together, use some dielectric grease on the contacts.

_________________
08 Joyner SandViper 250
07 Joyner SandSpider 650 - For Sale
06 Tank Urban Touring 150SE
04 Yerf-Dog Spiderbox 4209 GX150 (SOLD)
04 Yerf-Dog Spiderbox 3206 GX150
81 Honda Passport C70B

NW Riding - http://www.buggynews.com/viewforum.php?f=54


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 Post subject: Re: Dune 250 engine miss at WOT
PostPosted: Mon Sep 28, 2009 7:31 am 
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Joined: Thu Jan 08, 2009 10:46 am
Posts: 6
Location: Austin, Texas
Thanks so much for the quick responses. I will go through all contacts and switch and see what happens before ordering the new cdi.

Cheers~

_________________
"Retreat, devilville we just got here"
Captain Lloyd Williams, USMC at the Battle of Belleau Wood WWI
2005 WR-450
2000 LandRover Disco fully decked for the great outdoors
2007 Baja Dune 250 - sliders, clutch springs, IPF lights, etc.


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