i wonder if a bottle of compressed co2 would work? like from a mig welder. that's what i have sitting around when i do a brand new engine startup. i don't trust the extinguisher i have, don't know how old it is and if it will work when you need it. the only time my grandfather needed his it was plugged up my dirt daubbers. the compressed co2 doesn't have to be checked and can be refilled at welding store. of course even the smaller ones might be a little big to have in your truck.
