the truck had one of those propane system, and I had it removed, the truck has some serious power loss and hesitation/backfiring when over 50mph.

could this hose be causing the problem? if so, what can i do? remove it completly? install a new one?

thanks!

 

Take some vice grips, clamp it off, and see what happens. If it messes up the engine, just replace the hose with a new piece which should be cheap. My truck is a long ways away from me but that looks like coolant lines and the coolant lines for a CNG and gasoline vehicle are not the same. Ask someone with a similar F150 to look under their hood to compare. If you have not done so, you will probably need to replace a few coolant related lines.
I have heard that natural gas vehicles are totally clean on the inside and not gunked up like gas engines so that engine should last a long time for you when you get it all changed out.
You really should clean that engine and compartment if you want to do things to it because you need to see under the grime.

 

Its a 1997, with the 4.2L. I dont know anyone else with a f-150 here. But ill try the vice grips.

Thanks!

 

HUGE difference betwen a Natural Gas system and a Propane system. Those lines were teed into to warm the propane evaporator, you may want to eliminate the tees and replace them with a coupler on each hose. Whoever removed the propane system just plugged them together.

 

arent those heater lines??

 

forgive the ignant question... what could possibly be the purpose of a propane or natural gas ANYTHING on an automobile?

 

Ok, i'll remove the hose tomorrow. Could it be causing power loss?

 

I'd say it's more likely to affect whether or not you get any heat out of your heater, but you never know. They also look like they're laying on the exhaust manifold and more importantly the plug wires look like thay are as well, that could give you problems.

 

Way cheaper fuel cost. Downside is the large, round tank to deal with.