1973 jdx4 running problems

Bmx4life522 · Post by **Bmx4life522** » Fri Feb 09, 2007 6:35 pm

hello i have a 73 jdx4 that i bought from a friend an the sled sat for awhile an before he got it the sled sat im not sure how long. I just got the carb rebuild the whole thing redone an one coil was bad so i replaced it. The sled starts up an sounds good after motor is warm i ride it down the road wide open an turn around on the way back same throttle pos, the sled shuts of like its out of gas , i also tried letting it idle a few hours later an it idles for like 5-6 mins an then it just shuts off i dont kno how old the gas is if that could cuz that to happen or what..

please Help....

a_holscher89@hotmail.com

kwc · Post by **kwc** » Fri Feb 09, 2007 8:14 pm

A complete fuel system "rehab" is vital on these on these old sleds. Go to the fuel system section, very good info to help you.

http://www.angelfire.com/pa2/snowbolens/fuelsystem.html

afponiky · Post by **afponiky** » Fri Feb 09, 2007 8:29 pm

Kevin, you hit it on the head!

Go through the complete fuel system, new hoses all the way through, new filter, check the pickup tube in the tank.

It just sounds like your have a bunch of crud in the tank, make sure you clean that out. Take it out and clean it good.

I would even clean (soak) the carb again. I just got done doing this to my X4 and it is running like it was brand new.

Let us know how you do!

GRP

Bmx4life522 · Post by **Bmx4life522** » Sat Feb 10, 2007 8:13 pm

Ya thanks for your help i went through the Tank today an the pick up line was pluged...

afponiky · Post by **afponiky** » Sat Feb 10, 2007 9:21 pm

So did that take care of the problem? One other thing I was thinking about while I was running through these threads is to make sure you have a good vent for the fuel tank. Almost sounds like your pulling a vacuum on it.

Just a thought.

GRP

Bmx4life522 · Post by **Bmx4life522** » Sun Feb 11, 2007 4:03 am

well on some of the pics i seen on this sight of the gast tank it shows a vent tube coming up in between the two lines that go into the tank on mine theres nothin... any ideas... But the sled does stay running its just really boggy i just bought new plugs an fresh gas an am yet to try it...

400brian · Post by **400brian** » Sun Feb 11, 2007 5:14 am

Your tank is vented through the gauge. If you look closely, you will see a tiny hole in the clear face of the gauge.

The pick-up tank fittings have two tubes if equiped with a Walbro, one for Bendix carbs.

Bmx4life522 · Post by **Bmx4life522** » Sun Feb 11, 2007 3:09 pm

one more thing the sled seems to be a lil boggy on low end any sugestions

400brian · Post by **400brian** » Sun Feb 11, 2007 5:15 pm

Have you tried adjusting the carb?

Bmx4life522 · Post by **Bmx4life522** » Sun Feb 11, 2007 7:27 pm

ya some times the low end is fine some times its boggy now since i fixed that problem with the tank the sled will only idol for a lil bit then it runs the gas out of the line... then the sled will not start i really dont know much about sleds an old carberators

Danzig · Post by **Danzig** » Sun Feb 11, 2007 8:20 pm

Is your impulse line on? Sounds like the ole fuel pump is not pumping if its on, is it old and crappy, replace this if so. If all checks good, rebuild the carb. It could look like the pic.

Danzig · Post by **Danzig** » Sun Feb 11, 2007 9:02 pm

I want to add to the prior pic posted. This was bought off e-bay. Rebuilt, ready to go too, I am going to have to hire the guy who rebuilt this. He did an awesome job.

NOT

harleysportster · Post by **harleysportster** » Sun Feb 11, 2007 9:57 pm

Danzig,
Never give a positive feedback until you are completely satisified, even if it takes a couple of weeks.

Danzig · Post by **Danzig** » Sun Feb 11, 2007 10:03 pm

Oh, it wasnt positive.

Bmx4life522 · Post by **Bmx4life522** » Sun Feb 11, 2007 10:39 pm

i just had the carb rebuilt by a friend that sells parts an fixes vintage sleds... an the impulse line all i kno is that there are 2 diff lines 2 go in the tank i have the line that goes into the gas hooked up to the middle port on the bottom of the carb but both lines are on..