Problem with the throttle body on 1995 Chevrolet S10

I had a natural gas conversion kit put on the truck a few years ago,now it has a loud ticking noise coming from the throttle body.i put my hands on the fuel injection sileniods and it seems to be coming from them but im not sure,when i change the switch to regular gas the knocking goes away.Is this normal?

by in Costa Mesa, CA on August 29, 2012
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1 answer 4 comments
ANSWER by , August 30, 2012
seek an opinion from a natural gas mech poss suburban propane co. in placentia ca. it could be the gas is freezing up on you at exchanger
COMMENT by , August 31, 2012
They didnt have any info ,do you have any other ideas?No one has experience with these
COMMENT by , August 31, 2012
google propane and call some conversion places. sorry
COMMENT by , September 01, 2012
please leave a question open if you cant answer it,i probaly wont get an answer to a quetion thats already had a response.
COMMENT by , September 01, 2012