I believe it has an adjustment screw at the regulator....other wise try adjusting at the throttle butterfly....BTW LPG does not produce the energy that Gasoline does.....Performance is going to be very sluggish...
SOURCE: at stop rough idle
idle air speed controller.
dirty throttle body
air cleaner clogged
air flow meter
bad injector
leaking intake manifold
vacuum leak
bad plugs
ignition components
SOURCE: 2002 jeep grand cherokee 4.0 liter irregular idle.
You haven't changed everything...map sensor controls spark and fuel mixture as does the throttle position sensor, also check the idle control valve...Don't just buy stuff...do testing first.
SOURCE: 2006 trailblazer --- how to adjust idle ----
get computer codes, see if have any codes listed, could have faulty neutral switch computer not detecting in gear, or air by-*** valve, vacuum leaks, check pcv valve,
SOURCE: Rough idle, sputtering, and backfiring.
try turning ur idle up its the pin on the throtle body just make sure u tuen the engine off and on again fter each adjustment to reset ur computer on ur engine
SOURCE: I have a 2005 chevrolet trailblazer that idles
more than likely a vacuum leak get a can of carb cleaner and spray around intake gaskets throttle body vacuum hoses if idle rises or stumbles you have leak in that place
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