Won't go Up Hill

[carmen]

"Won't go up hill"

OK I give up and I need help. My stock M37 has been acting up lately. It seems that it wanted to stall and it seemed that it was not getting gas. Here is what I have done these pass 2 months, thinkng that I would have solved the problem.
1. Removed my gas tank and had it cleaned out.

2. Sealed the inside with (?) I can't rememeber the name, but it was the brand that Charles used. Great stuff.

3. Put a in-line NAPA Spin fuel filter between the tank and fuel pump. It is mounted on the inside rail.

4. Flushed out all the fuel lines.

5. Cleaned the jet line - the fuel line from the fuel pump to the carb out. Nothing in it.


Thinking that I solved the problem I took it for a ride. It started up and run like a top. Took it out side on the highway on the flat and I was passing cars. But once I came to a little incline It started to putter. I was able to prevent it from stalling and made it back to the garage.

So. This is what else I did.

1. Bought a can of carb cleaner and stuck the nose in and a lot of muck came out.

Went for another ride same problem, back to the garage.

I also drained the gas tank - again - thinking that there might have been some water in the gas. Put in fresh gas alone with a can of STP water treatment.

This time I took the top half of the carb off. More brown muck inside, cleaned that out. Went for another ride. Same problem. Going straight - great, going up the smalling incline wants to stall.

Thinking that it might be a vacume leak I check and tighten all lines I even replaced the small rubber hose line for the wipers. Went for a ride - Same @*&@( problem.

I don't know what else I can do. Both the fuel pump and carb were new when I put them in about 8 years ago. There are no leaks around the fuel pump were it is mounted to the engine block. Pluse I know that there is no gas mixing in or leaking into the engine block.

Any ideas? Please help. My goal is that I want to drive to Abeerden next May it is about 180 miles one way. I've put on 1100 tires, fraont and rear disc brakes and a duel MC. Everything was going great and now this.

Thanks

Carmen

 

[DDoyle]

RE: Won

I know you said the tank was cleaned, but....

it sure sounds like the fuel is not getting to the pick up tube. A rag, leaf, trash, some sort of lining product - drifts over the pick up tube.

Were it mine, I'd be inclined to put a 5 gallon can in the liquid container bracket and run a temporary fuel line to it and check performance. Start with going straight to fuel pump - if that solves the problem, work toward the tank to isolate it. If that doesn't solve the problem, work toward the carb.

HTH,
David Doyle

 

[AMGeneral]

Another thing to check,pull the top off the carb and check your float level.Since it seems to be acting up only while going uphill I would suspect your float level is too low,as you travel up hill all the gas inside the float bowl travels to the rear thus closing off the needle valve limiting the flow of fuel.Hope this helps.

 

[pa.rich]

Carmen, Did you run the engine with the new carb and fuel pump before you had the tank cleaned and sealed. Maybe the dirt from the tank is still in the float bowl on the carb and just needs cleaning out?

 

[pa.rich]

Mice in the carb? Was the air filter in place while it was stored?Take the carb apart and see how it looks inside.

 

[acetomatoco]

If you have the early style on dash fuel filter, the fuel lines (rubber) tend to get porous and fuel drains back into tank by sucking air in thru those lines.. you never see a leak because they are on the suck side of the pump...many is the time I have gravity fed fuel from a tank on the roof to the carb to get home when the on board delivery system did not work... But as you have said you have brown gunk in the carb... I would suspect the float level check as a alternative first effort.. Take the top of the carb off and use the hand pump on the fuel pump to check fuel flow and level by eye...and see how the float travels.. maybe on incline it sticks in the up position on the crud in the pivot...or sumpin as simple as that.