Suburban sputters when hot going up hills

Oh heavens no... NOT normal.

If it was sputtering or anything like that you wouldn't even begin to think it normal... so I'm writing off the water in the tank... (show itself on inclines & declines... but only on a hill?? Blocked exhaust... all of that would sputter & fumble.

Interesting!

I'm going with a fuel pressure problem... marginal or an ECU... or timing is way off.

In the old days... when you hit a hill.. the vacuum drop was quite significant... the distributor advance would drop back to RETARDED... give you more TORQUE and bring you efficiently up that hill... So if your fuel pressure is good... timing tests good... you need to be looking at your ECU...

I'm thinking that is where all the vacuum, rpm... advancing is properly monitored.

Happy hunting...

Fuel pump gittn hot from wear.....probly old. Igntion parts may b worn tu. Idle air control mite need attention

Could be clogged fuel injectors. I had a problem similar to this. Car ran okay on flat areas but would spit and sputter going up inclines. I took mine to an oil change place and they ran a cleaner through the system. This fixed the problem and I put an injector cleaner in with every 3rd tank of gas to keep this from happening again.

change your fuel pump filter and put some injector cleaner through a half tank of gas and drive

catilatric connverters

Have you checked the fluid level on flat ground while the engine is running ?

I would think that you need to replace the spark plug wires and the distributor cap and rotor here.

i have an 86 dodge ram 50 that sputters when i step on gas going up hill after it warms up ive changed the gasket twice with no luck solving problem it runs fine in neutral but in gear under a load it sputters

check the spark plugs and wires and distributor cap. fuel filter. then maybe ignition timing.

1/4 tank on the flat. You fuel system is sucking air on a grade bcause it is all going t the front of the tank. !/2 tank is about as low as you should go.