carb question

[Josh D]

While running up to Santa Fe yesterday to ski, the GW started bogging on long hills at full throttle. It would start cutting out, like it wasn't getting enough gas. If I backed off the throttle, it would recover, but the loss of momentum and the ability to open up the throttle full really caused me to lag on the hills. Possibilities: Low float? Altitude compensator opening too much? Not enough fuel volume from pump? Economizer valve?
It does run fine around town. It does have a new mechanical pump and filter (yes, the return is in the up position). I do have an inline electric pump at the tank that I don't run anymore cause I think it was going out. Do you think it could be enough of a restriction to limit my fuel volume and causing a problem when I'm needing the most gas?

[brad_fsj10]

Are you runniung a stock air cleaner or one of those open element chrome jobs. It's possibly icing up at altitude without carb heat.Just a guess.

About the inline pump. If you get full throttle "in town", I doubt it is causing a restriction at the slopes.

[Cecil14]

If you're not using the electric pump you may want to take it out of the loop. Some will allow you to pull through them and some won't.

Anthony

[Josh D]

btt

[Kukur]

FWIW,

Mine started doing the same thing on the way up the pass to do some snowboarding. Got home and just as a precaution I changed both my air & fuel filter. I was lucky enough that combined they were effecting the mixture.

[Don S]

Originally posted by Cecil14:
If you're not using the electric pump you may want to take it out of the loop. Some will allow you to pull through them and some won't.
Anthony..
Josh
I agree.
I've had a lot of different electric pumps and combo's... all will add to line loss.
Not all machanical pumps are equil.
quoting me :D
In spite of many claims extra fuel pumps in line do create more friction in the fuel lines so that at critical times all must be running at the same time. Simply adding an electric pump in line with a mechanical pump is doable but will slightly impede the fuel flow unless the electric-pump is switched on. The electric pump may put a strain on the diaphragm of the mechanical pump. If the diaphragm wears out a hole will develop which could cause a catastrophic amount of fuel to end up in the crankcase quickly. Have a good JB day ;) .. Don S..

[Josh D]

Thanks guys. The electric pump is coming out this weekend, then I'll flog it up some hills to see if that takes care of the problem. She's gotta be ready to tow the little Jeep on a trailer in a couple weeks, so I hope this takes care of it.