Is my '75 B210 starving for fuel?

[grazapin]

My bone stock '75 B210 recently started giving me grief in specific situations. I can drive around in stop and go traffic all day, but if I cruise on an uphill for a while going a steady 35mph+ it suddenly acts like I've run out of gas and dies. I can usually fire it right back up and continue driving.

 

Here's some scale of how long it takes this to happen if you're familiar with Seattle. I can get on northbound 99 at Denny and cruise almost all the way up to the Aurora bridge and it will almost always die right there. Then I can continue on north and it will die again just before cresting the hill at around 50th.

 

If anyone can point me in the direction of where to start troubleshooting this issue I'd be grateful.

[B210GX]

Have you checked your fuel filter at all?  thats the first thing to check

[datzenmike]

I agree. (if for no other reason than it's likely never been changed or not in the last few years) The filter slowly chokes off flow. High speed, climbing hills or passing uses more fuel than the pump can pull from the tank and the carb goes dry. They are only $5 so easy fix. 

[grazapin]

Damn, that was easy. Didn't even have to crawl under the car to replace the filter like other cars I've owned. Gotta love old Datsuns with replaceable parts conveniently located and easily accessible in the engine compartment, and there's even room to work in there. That's more than can be said for many modern vehicles.

 

datzenmike, your parts budget was 40% high. Total cost was just under $3 with tax. :)

[dat521gatherer]

If you buy one from napa it will be clear and you can see what is coming out of your tank and know when it gets clogged.