RPM drop after long highway drives?
2003 Saturn ION-2
I drive quite a bit, usually 2-3, (60-90 min) trips a week. Every few weeks or so my car will drop rpm's to about 500 after I hit the first stop. Only happens towards the end of trip when i reach my exit's stop light or stop sign. Sometimes the rpm gauge will flutter around the high hundreds not wanting to stall because it is an automatic 5-speed. My fuel level doesn't change the outcome and neither does my engine's temp. Im wondering if the fuel is getting cut off or being deprived of air? Car vibrates a little bit as most cars do when they stall or are about. Oh and if it does stall out, all I have to do is put it in park and turn ignition off and restart it up. Sometimes might do it at next stop and sometimes will be fine after. Has only happened to me 3 times within 50-60 days.
Pete's getting the top vote, thanks alot man. and you're nuts if you think im getting higher octane fuel at chevron, musta missed the part where i said i drive a SATURN ION, enough said...nice try though.
- Pete MLv 79 years agoFavorite Answer
Might be as simple as a dirty throttle body, idle air control, EGR valve or PCV valve.
Try cleaning them up and see if that doesn't cure the problem.
All it takes is a can of carburetor cleaner and an hour or so of your time.
See links below for details.Source(s): http://www.youtube.com/watch?v=eQpPcdvSBks http://autorepair.about.com/od/regularmaintenance/... http://www.cdxetextbook.com/fuelSys/emission/emiss...
- 9 years ago
Try using a higher octane fuel and go only to Chevron gas stations... Also check the transmission fluid to see if it is not dark, at the right level, and doesn't smell burnt.
- OtisLv 59 years ago
clean the throttle plate and throttle body bore. helps a lot of times.