20v Blacktop High Idle
Posted: Tue Mar 21, 2017 9:22 am
I'll try to keep it short. I searched the forum but got lots of unrelated posts.
Engine: 20v blacktop stock with power steering and A/C. No intake with ITG filter. Vacuum routing looks correct. ISCV was cleaned and is hanging behind engine with breather filter on the open end. Possible failing or failed VVT pulley.
Problem: Engine idles at 1500rpm
Symptoms: 1500rpm when warm. Was like this when I first got the car then a few months back it started to idle great at 900-1100 when warm and felt smoother but could be my OCD. Then started to creep back up so I changed the vacuum tubes. Old tubes slipped off easily and new silicone tubes fit snugly. After that, the engine started to idle at 1500rpm. I will check for leaks and the timing this weekend and update. I cleaned the butterfly valve and inside the itb so I don't think it's slightly open. I made sure to manually close it to see if it drops the idle but didn't.
Also, once warm and I accelerate and come to a stop, idle will be at 1400 - 1500rpm. After about 20 seconds or so of idling, the idle will drop 300rpm. Don't know if this is normal as I am unfamiliar with this engine.
With A/C on idle drops 300rpm to around 900-1100. Read there is idle up for the A/C but unfamiliar with how it works. Should it keep the idle the same before the A/C turns on?
Sorry I guess this wasn't short. Thank you in advance for any help.
Engine: 20v blacktop stock with power steering and A/C. No intake with ITG filter. Vacuum routing looks correct. ISCV was cleaned and is hanging behind engine with breather filter on the open end. Possible failing or failed VVT pulley.
Problem: Engine idles at 1500rpm
Symptoms: 1500rpm when warm. Was like this when I first got the car then a few months back it started to idle great at 900-1100 when warm and felt smoother but could be my OCD. Then started to creep back up so I changed the vacuum tubes. Old tubes slipped off easily and new silicone tubes fit snugly. After that, the engine started to idle at 1500rpm. I will check for leaks and the timing this weekend and update. I cleaned the butterfly valve and inside the itb so I don't think it's slightly open. I made sure to manually close it to see if it drops the idle but didn't.
Also, once warm and I accelerate and come to a stop, idle will be at 1400 - 1500rpm. After about 20 seconds or so of idling, the idle will drop 300rpm. Don't know if this is normal as I am unfamiliar with this engine.
With A/C on idle drops 300rpm to around 900-1100. Read there is idle up for the A/C but unfamiliar with how it works. Should it keep the idle the same before the A/C turns on?
Sorry I guess this wasn't short. Thank you in advance for any help.