Engine sputters when hot

[Stickman]

I've got a 79 CJ7 with a Pontiac 305 conversion out of a 1991 Firebird. The engine has over a hundred thousand miles on it and runs great, (plenty of power, no noises, etc...). Every so often, the previous owner and myself have experienced a sputtering, (like its starving for fuel) while driving on the trail, (engine temp at a normal 205 ish).
I've tried to put a load on it (high RPM's) to no avail. The only thing that stops it is letting it cool down for a bit. It's very sporadic and has only happened twice in two years for me, (about 600 miles of driving). It has an aftermarket elec fuel pump, the tank is new as is the filter.
Anyone have any ideas? Someone mentioned "vapor lock" however with it being so sporadic, I can't substantiate it.

[aw12345]

is a tbi or port injection? I have had a somewhat simular vapor lock problem on tbi injections the pump made enough pressure to keep it running but not enough to open the regulator so it would not send fuel back to the tank. so when it got hot and you would let of the gas it would crap out. get it hot and checl the fuel pressure, is a good starting point if thats up to spec start looking at sparkplug wires sometimes the spark plug boots start arching through when hot and it starts dropping a cylinder

[Stickman]

is a tbi or port injection? I have had a somewhat simular vapor lock problem on tbi injections the pump made enough pressure to keep it running but not enough to open the regulator so it would not send fuel back to the tank. so when it got hot and you would let of the gas it would crap out. get it hot and checl the fuel pressure, is a good starting point if thats up to spec start looking at sparkplug wires sometimes the spark plug boots start arching through when hot and it starts dropping a cylinder

Its TBI......Not sure how I check fuel pressure. In addition, I think I'll go ahead and replace the wires and plugs for good measure.

[aw12345]

You would T the gauge into the thicker fuel line of the 2

fuel pressure should be somewhere between 10 to 13 psi if memory serves me correctly

[Stickman]

You would T the gauge into the thicker fuel line of the 2

fuel pressure should be somewhere between 10 to 13 psi if memory serves me correctly

You wouldn't happen to have one, would you?

[aw12345]

A pressure gauge? I am sure I can come up with one and some fittings to T it in

[Stickman]

A pressure gauge? I am sure I can come up with one and some fittings to T it in

Yes, the pressure gauge. You mentioned something about rolling to Rat patrols shop re: cutting my corner guards and picking up aluminum (different thread under "V8 Engines"). Once I get with Kurt on the date(s), I'll sned them to u. If u can roll, let me know, and maybe we can gaudge it then. Thanks.

[aw12345]

We will figure something out. Riverside is not terribly far from Ontario as it is

[Stickman]

We will figure something out. Riverside is not terribly far from Ontario as it is

Copy that.......Thanks