After oil change, suddenly bouncing / surging idle
#1
Full Member
Thread Starter
After oil change, suddenly bouncing / surging idle
Recently rebuilt engine with PFC on first 500mi oil change. I changed the oil, warmed it up, took it for a quick spin to the store and back. Everything is fine until I get to my driveway, where the idle starts bouncing between about 950 and 1400rpm continuously. Sounds like I'm sitting there blipping the throttle. Very regular and rythmic. Took it back out and it just does that all the time now. Bounces and never learns or settles down. The car seems otherwise totally normal and drives fine. If I turn on the AC the car settles into a high but steady idle around 1300rpm.
Previously the car would hunt for idle a bit when cold and stalled once or twice when clutching in at a stop (again, only when cold), but had a steady 1k idle when warm.
Looks from searching like I need to look at the idle control screw and the TPS, but it seems weird when this problem appeared so suddenly. There couldn't be abything about changing the oil that could relate to this issue, right?
Previously the car would hunt for idle a bit when cold and stalled once or twice when clutching in at a stop (again, only when cold), but had a steady 1k idle when warm.
Looks from searching like I need to look at the idle control screw and the TPS, but it seems weird when this problem appeared so suddenly. There couldn't be abything about changing the oil that could relate to this issue, right?
Thread
Thread Starter
Forum
Replies
Last Post
LunchboxSA22
2nd Generation Specific (1986-1992)
37
10-26-15 10:53 AM
ncds_fc
New Member RX-7 Technical
1
08-15-15 10:06 AM
rkhanso
2nd Generation Specific (1986-1992)
1
08-13-15 11:40 AM