Thread: Not really a hotrod. but still a classic to me.

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Forgive my ignorance please! & Thank you!

Does the fuel pump use an " out-of-round " cam lobe to actuate an arm on the fuel pump?

Unlikely or possible the cam lobe for the pump is worn out?

Originally Posted by t-top havoc

Forgive my ignorance please! & Thank you!

Does the fuel pump use an " out-of-round " cam lobe to actuate an arm on the fuel pump?

Unlikely or possible the cam lobe for the pump is worn out?

Yes, there is an eccentric at the front of the cam to drive the fuel pump, and they have been known to wear flat. If they do you have that cam metal circulating throughout your engine lubrication system, which is not a good thing. You could check it by inserting the push rod, holding it against the cam with you finger, and having a buddy rotate the engine to see that the push rod moves in & out.

T-Top yes it has the lobe, That was one of the things I checked when pulling the pump right after I noticed the hose collapsed. There is good marking on the actuator arm from the lobe so it looks good. Didnt try a push rod in there though. but with the wear markings on the arm looks like its hitting good. And the markings look very recent.

Thanks
Joker51

Ok just finished putting my fuel pump back on as I bench tested it for my fuel issues. Replaced one last hose also as it appeared to be collapsed. Once that was all done I tried to start the Traveler to see if it was the problem. Turned the key and heard just a slight clunk/pop. did not attempt to turn over or anything. No lights no nothing. Hooked up jumper cables and when I try to start it this is what happens.
<iframe width="420" height="315" src="http://www.youtube.com/embed/tMz1vPEbkC0" frameborder="0" allowfullscreen></iframe>
Disconnect the jumper cables and nothing again, no noise no nothing. Thinking its battery as it does more with the cables connected. Any other ideas what it would be? Never had an issue with battery before pulling pump. Didnt touch anything electrical but Traveler has been sitting out in the rain for the past 5 days none stop with the top off. Had a tarp over it for 4 of the days.

Thanks
Joker51

Here's the link to your clip - http://www.youtube.com/embed/tMz1vPEbkC0 Might be that the battery's gone, but the dash/instruments are not intended to be out in the rain unprotected. I'd say you're going to have to either wait for everything to dry out before you can do much or you might be able to charge the battery (or drop in a new one) and before hooking it up pull all the fuses out other than any that are needed for the start/run circuits to see what you've got. But if you plug in fuses with wet components you'll either blow fuses or fry components. Letting it get soaked was not a good thing, IMO.

Have the battery tested after charging, clean & verify connections at both ends of the battery cables. Hopefully you can help it dry out somehow..

joker 51,

I too am waiting to here the fix. I had a 75 scout II w/a 345. Bought it with 90,000 miles and sold it with 246,000 miles, ran like a top.

Jack.

Well got it started tonight, used a voltmeter to test the battery, showed 12.67 at the battery but nothing at the cable. Clamp was not allowing voltage through it. Just a little corrosion on the bolt. Took it off and cleaned it all up. Took it for a test drive. And still having fuel starving. Once it starts dying I let it sit a couple minutes and starts up again and can drive around 500-1000 feet or so and then dies again. So now its time to drop the tank again and check the sock on the fuel sender, Hopefully its just getting clogged. Could a bad sender unit (ie fuel gauge wont go to full) cause this? Maybe the pickup is clogged not sure. But being a mechanical pump Im thinking it has to be getting clogged at the sock.

Joker51

Originally Posted by joker51

Could a bad sender unit (ie fuel gauge wont go to full) cause this? Maybe the pickup is clogged not sure. But being a mechanical pump Im thinking it has to be getting clogged at the sock.
Joker51

No, a bad sending unit has no bearing on anything but the fuel level indicator on the dash. That's it's only function, but it's a good time to fix it while the tank's down. One thing you could try is drive it until it stalls out, then quickly unhook the fuel line into the carb, direct it into a container and have someone crank the engine while you watch the line. If the sock is clogged you'll be getting no, or very little flow during crank; then once it sits for a few minutes (particles fall away from the sock?) you'll again have flow. Just an idea to gather information, but don't set the Scout on fire with raw fuel and a hot engine.

Is the gas tank and // or cap supposed to be vented?
Is there an emission canister?
Im wondering if there is an issue with these items if you have any of them?

Havent disconnected the line to check but have removed the air filter and see no stream in the carb.

Charcoal canister is not hooked up. have removed the vapor collector tank and routed the vent lines back into themselves after 1 broke off while dropping the tank. Have driven the Traveler about 30-40 gallons worth since the changes to the tank and putting in the new ignitor. And when its died I have removed the gas cap to see if it was locking up due to venting but no sound of a vacuum. It just has me stumped right now. Everything that I can think of has been checked but dropping the tank again and checking out the sock and see if anything if floating in the tank.
(All new rubber fuel hoses. New inline filter, new carb filter. Fuel pump and carb have less than 400 miles, New vacuum hoses, new pertronix ignitor.)
Any other ideas to check before tank dropping?

Thanks
Joker51

My thought was the gas tank or gas cap wasn't venting or taking in air as gas was being used, causing a restriction in flow.
Next time you get it running,
let it idle 2 - 3 minutes,
turn it off
remove the gas cap
Listen for abnormal amount air being sucked into the tank &
see if there is an abnormal amount of fumes rushing out.
Use caution so as not to get gas sprayed on you in the event it should do so.
My thought on this--
If the venting is not working, the air can not replace gas being used, causing a loss of suction pressure. Similar to drinking from a plastic bottle-- the drink will stop flowing.
Im sure someone can explain it much better, & even tell me Im out in left field...LOL!!

HA HA!! You posted b4 I could finish!!
When you drop the tank, check the pick up line isn't against the bottom of the tank.

Will check that, gonna try to drop the tank tomorrow or sat. wanna get it running for the holiday weekend.

Thanks
Joker51