Anyone ever have lots of trouble with propane..?

[rob h]

Wow i must say, nothing but a huge azz headache. 1st i hooked it up and it ran real good, then one day just cranks, that was the vaporizer seat. I fixed that and it ran good but not perfect, i had the vac hoses wrong, fixed them and it turns over 10 times when cold and fired up directly when hot. So then i bought a digital air fuel guage with a heated 02. I had the carb all tuned in real good.....moved the vaporizer next to the carb, throttle response is real snappy, it runs excellent. Timing was at 14 and the air fuel numbers are 16 at idle and in 15s underload, couldnt ask for much better.

Today i found a leak, fixed it and i only cranks. Checked the lockoff, strainer and there all good. It drove me nuts, i checked for spark and thats good, so i tried either, it fired right up and ran on propane. I tried the primer on the vaporizer and that made it fire right up, 3xs i did that then i just bumped the key and it starts easily (damn gremlins..lol).But the 1st time started air fuel numbers were crazy, the next 4times they are the same.... That thanks to fixing a small vac leak(pin hole). So thats where im at lol..half of these headaches are because of mistakes........so now ill have to see how it runs tom afternoon, retune the carb and adjust the timing.

 

[dirtygoat]

While i was reading I was ready to tell you to check for vacuum leaks...

A buddy had weird issues with his and it all came down to a vacuum leak...

Then at the end you came across it...

That's usually the problem with propane... It's stupid easy otherwise...

I love mine...

 

[rob h]

still not totally right tho, ive been messing with it for weeks, thats what i get for buying used i guess. Ive bought all new except for the carb. Ive replaced the x-1 with a woodward n-420 since the x-1 had a bad seal and the parts were as much as a new one.

The clamps on the hoses are a plus ive found out, they have helped alot.

 

[kgblazerfive]

Mine doesn't have any issues but its been on the truck for like 20+ years

 

[rob h]

What propane parts do you have..? mixer/evap..?


Mine seems to run good, the air fuel is a little rich but it runs decent. Just cold i have to use the primer button.

 

[dirtygoat]

I run an Impco 425, Model E and a VFF30...

That's the most common set up out there...

 

[Hogback Fabrication]

I run an Impco 425, Model E and a VFF30...

That's the most common set up out there...

That's what's on mine, put it on and everything went as it should. Everything was new on mine though.

 

[rob h]

I might eventually try that setup if mine ever has the trouble ive had. I went elec lockoff to conserve space. The x450 seems to have enuf for my wild sbc.

How do you guys have them mounted, Where did you put the model e...? I put my woodward n-420 on the inner fender along with the lockoff/filter, the hose is rather long tho. I tried mounting it on the intake but it took too much heat soak.