Wha do you people suggest for the vaccum line going to that valve. The emisions stuff has been stripped. Should I just wire the butter fly open or should I put some ported vaccum to it?
thanks
thanks
CK5
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Cold Start Valve in Exhaust
- Thread starter Justin Fleming
- Start date
adamforsythe
1/2 ton status
I just took mine off.
nothing needs to be done..
If the EFE Valve (Heat Riser) is vacuum operated,vacuum CLOSES it when the engine is cold..its spring loaded to hold it in the OPEN position when the motor warmed up and vacuum is denied..so if you leave the hose off,its already open,the spring inside will hold it open..no need to wire anything!..
You will get faster warm ups and better gas mileage if the EFE is operating correctly,especially if its cold where you live during the winter..I practically HAVE to have mine working and the "Hot air" tube to the aircleaner too,or my carb frosts up like a sno-cone and it ices up and causes stalling on cool dmap days--which we get more than our share of around here!
If the EFE Valve (Heat Riser) is vacuum operated,vacuum CLOSES it when the engine is cold..its spring loaded to hold it in the OPEN position when the motor warmed up and vacuum is denied..so if you leave the hose off,its already open,the spring inside will hold it open..no need to wire anything!..
You will get faster warm ups and better gas mileage if the EFE is operating correctly,especially if its cold where you live during the winter..I practically HAVE to have mine working and the "Hot air" tube to the aircleaner too,or my carb frosts up like a sno-cone and it ices up and causes stalling on cool dmap days--which we get more than our share of around here!
As mentioned, it's normally open. Just make sure that it moves freely, or at least stays open. Typically they rust in place, hopefully thats open.
