of course there are other things that can cause a lean idle. But, as a rule, an air leak is by far the most common and easiest to diagnose & fix. If you can't find the leak by looking, try looking at your fuel trim while you add propane externally. If the idle smooths out, and/or the fuel trim numbers get better. than your problem is too much air OR, not enough fuel. Watch my Fuel Trim Video for an explanation
You are awesome.
EricTheCarGuy 2 years ago
of course there are other things that can cause a lean idle. But, as a rule, an air leak is by far the most common and easiest to diagnose & fix. If you can't find the leak by looking, try looking at your fuel trim while you add propane externally. If the idle smooths out, and/or the fuel trim numbers get better. than your problem is too much air OR, not enough fuel. Watch my Fuel Trim Video for an explanation
realfixesrealfast 2 years ago
will that fix a lean at idle 2? i have a 03 windstar that has irratic idle only when car is warming up...
lawnside82 2 years ago