wet problems

[groome]

hey everyone i have kinda hit a brick wall. went for a ride last night and got caught in rain after a couple of minutes in the rain the fudge started to misfire quite bad. i stopped and had a quick look but couldn't really see anything wrong. so carried on riding and found it would run ok with the throttle wide open and in higher revs (got some funny looks with the bike reving its nuts off and not going warp speed)
i have had a look at work today there is no sign of tracking on the plugs, pulled every connector apart, cleaned and sprayed them. pulled the pickup cover off and checked the seal and its all dry in there. despite all this she is still farting and spluttering. so if anyone has any good ideas i am all ears.

cheers

[FJmonkey]

This has been mentioned before. A crack in the ignition module allows water in and causes poor ignition. Something to check that is not normally a problem but easy to verify.

[groome]

right ill have a look tomorrow do you know if any one has relocated it successfully on a 3cv?

[FJmonkey]

right ill have a look tomorrow do you know if any one has relocated it successfully on a 3cv?

If you find a crack then you might be able seal it up (RTV, Shoe Goo, bubble gum etc...). If not then a replacement part is required. Or stay out of any wet riding conditions. 

[groome]

Just had a look and found a crack on the cdi so flushed out with brake cleaner a little squirt of gt85 and sealed with shit load of rtv. I'll give it a try when rtv has set. Thanks for the advice 

[balky1]

Just had a look and found a crack on the cdi so flushed out with brake cleaner a little squirt of gt85 and sealed with shit load of rtv. I'll give it a try when rtv has set. Thanks for the advice 

Just something that came to my mind, I'm probably wrong, but, if the water got into it, wouldn't it be better to take it of and leave on a sunny place for day or two just to be sure all the moisture is out? This way, if you sealed it wet, it could just corrode something inside over time.

[CutterBill]

Just something that came to my mind, I'm probably wrong, but, if the water got into it, wouldn't it be better to take it of and leave on a sunny place for day or two just to be sure all the moisture is out? This way, if you sealed it wet, it could just corrode something inside over time.

I had the same thought...

[ribbert]

Just something that came to my mind, I'm probably wrong, but, if the water got into it, wouldn't it be better to take it of and leave on a sunny place for day or two just to be sure all the moisture is out? This way, if you sealed it wet, it could just corrode something inside over time.

I had the same thought...

As did I, but in my experience evaporation and condensation as it warms up cause more immediate problems, this can wet 100% of the circuitry from just a little bit of water in the bottom and they are very sensitive to moisture. Poor running usually demands a fix before corrosion has a chance to form.

Fabric tape makes an excellent permanent repair for those sorts of jobs - AFTER it's completely dried out.

Noel

[FJmonkey]

Very happy you found the problem. It is the information shared on this site that made a quick solution possible. Make sure it is good and dry, seal it up and hope for the best.  Report back so others will know if your repair worked.

[groome]

i know what you all mean but thats why i used brake cleaner and gt85 to displace the moisture before sealing it up.