[Sportster]

My car will idle ok and then like every 20 secs the idle will dip down and almost stall the engine-it will stall it on occasion-then it pops back up to a normal idle. Does this rythmically...idles well,dips,idles well,dips,etc. It will stall the car at some stop lights with the brakes on. And coasting during driving will cause this also,I can feel the car lurch and return to normal. But when accelerating it doesn't do it,only when I take my foot off the gas or coast,then I can feel the idle drop down and return. Replaced the PCV and hose,didn't help.

 

[johnboy00]

QUOTE (Sportster @ Sep 1 2010, 02:46 AM) index.php?act=findpost&pid=353478

My car will idle ok and then like every 20 secs the idle will dip down and almost stall the engine-it will stall it on occasion-then it pops back up to a normal idle. Does this rythmically...idles well,dips,idles well,dips,etc. It will stall the car at some stop lights with the brakes on. And coasting during driving will cause this also,I can feel the car lurch and return to normal. But when accelerating it doesn't do it,only when I take my foot off the gas or coast,then I can feel the idle drop down and return. Replaced the PCV and hose,didn't help.

I had a similar situation on my 2000 GLS. Mine turned out to be a crank sensor. You may want yours looked at before it goes completely and you have to get it towed. :w00t:

 

[johnboy00]

QUOTE (Sportster @ Sep 1 2010, 02:46 AM) index.php?act=findpost&pid=353478

My car will idle ok and then like every 20 secs the idle will dip down and almost stall the engine-it will stall it on occasion-then it pops back up to a normal idle. Does this rythmically...idles well,dips,idles well,dips,etc. It will stall the car at some stop lights with the brakes on. And coasting during driving will cause this also,I can feel the car lurch and return to normal. But when accelerating it doesn't do it,only when I take my foot off the gas or coast,then I can feel the idle drop down and return. Replaced the PCV and hose,didn't help.

I had a similar situation on my 2000 GLS. Mine turned out to be a crank sensor. You may want yours looked at before it goes completely and you have to get it towed. :w00t: