Fall in rpm

saturn
sl

#1

Coming to a stop the car acts like it is going to quit,stall .it gets quieter if that makes sense. it is a saturn sl2 with 148,000, recently last year has had brakes-just last week, battery last month,fuel filter, water pump last year. Friend said it could be spark plugs which were done about 50,000 miles ago


#2

It could be a lazy idle air control (IAC) valve.

It could be a sticking open EGR valve.

It could be - if its an automatic transmission - a sluggish unlock of the torque converter clutch.

It could be … any number of other things. The above are my first suspects.


#3

is adjusting/fixing iac an easy thing to do?? it is an automatic transmission


#4

The IAC normally sits right on the throttle body and is held on with all of 2 or 3 small bolts. You start by cleaning it up really well with something like throttle body cleanr. You may as well clean the throttle body while you’re at it.


#5

ok will try that, thanks