I replaced the maf, pcv, tps. Still it doesnt idle. I unplug the maf, idle kicks up to maybe 2000 rpms.....any sugestions ?
scan for codes. possibly idle air control valve.
Ive changed the idle air control valve, still high idle....
Could be sucking air somewhere, check for vac leaks.
When I unplug the maf, the idle kicks up, I plug it back up and the motor dies. know I didn't mention that earlier. Does that help find a possible solution or pin point the vacuum that could be causing the problem ?
Common Century problem is the TPS. It rarely sets off a code is why it's so hard to diagnose. To change one on a late model Century, get a T20-3/8 socket with an extension to get it off. A T20 screwdriver is tight and you might not be able to get your hand in there to grip it. Don't get one of those cheap $5 EBay TPS specials, unless you don't might changing it 4 times a year!
Looking for a Used Century in your area?
CarGurus has 825 nationwide Century listings starting at $1,800.
Search Buick Century Questions
Buick Century Experts