vp running rough

[fvdroadking]

can anyone help have vp 92 calais on gas back fired air filter ok no visible lines off and plugs and leads replaced ,injector cleaner added to fuel still running rough,any suggestions,,

[rob drag racer]

can anyone help have vp 92 calais on gas back fired air filter ok no visible lines off and plugs and leads replaced ,injector cleaner added to fuel still running rough,any suggestions,,

injector cleaner added to fuel is a waist of time it dose very little check and clean you IAC i had an IAC let go after a lpg backfire may need replacing also check that the throttle body hub for the lpg ( it should be on the end of your throttle body ) is sealed so no air can get in i had to put a thick bead of silicone around mine at the throttle body end of the gas hub as i blew the original seal out hope this helps