Car Details
2004 Corolla CE with approximately 80,000 miles.
Problem
The fast idle is around 2100 rpm and doesn't come down to normal idle for about 4.5 minutes. I doesn't really matter whether it's 70 degrees out (yesterday) or 90 degree temperatures, it still idles far too long (in my opinion). My Avalon goes off fast idle during the summer within 20 seconds. This problem was worse before the intake manifold replacement (2700 rpm) but I still find it's too high at start and takes too long to go off fast idle.
Diagnostics
There is not engine light and I also checked for codes which none were found. At 70,000 miles I replaced the intake manifold gasket with OEM material. Two weeks ago I replaced both O2 sensors (Denso) as well as the TPS (Denso) just as a maintenance procedure, not due to any trouble codes as there were none.
Question
Since not trouble codes are found/stored, any suggestions on troubleshooting?
Thanks
2004 Corolla CE with approximately 80,000 miles.
Problem
The fast idle is around 2100 rpm and doesn't come down to normal idle for about 4.5 minutes. I doesn't really matter whether it's 70 degrees out (yesterday) or 90 degree temperatures, it still idles far too long (in my opinion). My Avalon goes off fast idle during the summer within 20 seconds. This problem was worse before the intake manifold replacement (2700 rpm) but I still find it's too high at start and takes too long to go off fast idle.
Diagnostics
There is not engine light and I also checked for codes which none were found. At 70,000 miles I replaced the intake manifold gasket with OEM material. Two weeks ago I replaced both O2 sensors (Denso) as well as the TPS (Denso) just as a maintenance procedure, not due to any trouble codes as there were none.
Question
Since not trouble codes are found/stored, any suggestions on troubleshooting?
Thanks
