L98 Idle question.
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
L98 Idle question.
Okay, the baby is back on the streets & overall is running VERY well. I have to say the extra grip coil over shock conversion ride is a bit harsher than I expected but I'll live with it for the handling.
My question has to deal with idle, clutch in & car rolling, speed is not too important. Same at 5 mph to 50 mph. When rolling the idle seems to hunt, up & down from 800 to about 1100 RPM. As soon as I come to a complete stop the idle drops to 800 & stays there, smooth & clean. Does anyone else experience this &/or is this normal?? :confused:
My question has to deal with idle, clutch in & car rolling, speed is not too important. Same at 5 mph to 50 mph. When rolling the idle seems to hunt, up & down from 800 to about 1100 RPM. As soon as I come to a complete stop the idle drops to 800 & stays there, smooth & clean. Does anyone else experience this &/or is this normal?? :confused:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: L98 Idle question. (Trog)
Though I don't feel it with my A4, my scanner shows that desired idle varies with speed/rpm and possibly with throttle position.
But I don't know if "hunting" idle with speed is normal.
But I don't know if "hunting" idle with speed is normal.
Burning Brakes
Joined: Dec 1999
Posts: 983
Likes: 152
From: Columbia MD
Re: L98 Idle question. (Trog)
I've seen this same behavior on my car. As long as the car is rolling, the car stays around 900+ rpm. Once I'm fully stopped, it drops to around 650rpm. I always assumed this was normal. Is it?
:confused:
:confused:
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Re: L98 Idle question. (Trog)
Perhaps hunt was the wrong term for me to use. In an attempt to be more precise, the idle goes up & down between 800 & 1100 RPM. Almost like you were slowly turning the IAC up & down by hand. Its not all that rapid of a process about 1 or 1.5 seconds up & another 1 or 1.5 to go back down. I'm guessing that the chip in reading vehicle speed, RPM, vacum etc is thinking the idle is too low??
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: L98 Idle question. (Trog)
Did you consider changes in vacuum level because of using brakes or power steering pump load in slight turning, or even A/C cycling?
There are many conditions where a little RPM will improve driving experiences, so I wouldn't think it's a bad thing...it may be by design. :)
[Modified by BBA, 6:24 PM 12/5/2003]
There are many conditions where a little RPM will improve driving experiences, so I wouldn't think it's a bad thing...it may be by design. :)
[Modified by BBA, 6:24 PM 12/5/2003]
