Where should stock idle be on a 2000 Z28??
06-29-2007, 06:43 PM
#1
Launching!
Thread Starter
iTrader: (5)
Join Date: Apr 2007
Location: Central NJ
Posts: 211
Likes: 0
Received 0 Likes
on
0 Posts
Where should stock idle be on a 2000 Z28?? I'm just curious, my car runs freakin great and nothing is giving me problems, but it idles at 500rpm on the dot. Is that normal? I thought I should be just shy of 1000. It doesn't even idle rough, it's dead level at 500.
I figure if it ain't broke why fix it, but figured I'd ask around.
I figure if it ain't broke why fix it, but figured I'd ask around.
06-29-2007, 07:24 PM
#4
TECH Senior Member
In gear, foot on the brake and warm, with stock tune - mine showed idle quickly changing from 525-585 on a scanner. Tach said just over 500. Park/neutral idle is higher (645-676) on a scanner. I think your's is fine.
06-29-2007, 10:14 PM
#6
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,039
Likes: 0
Received 1,489 Likes
on
1,072 Posts
Forget what your factory tach shows. And forget what other people tell you that their factory tach shows. The factory tachs are usually off by 100-200rpm at idle. Only a scanner or aftermarket tach will give you the correct idle speed.
Here are the factory presets for ALL years of LS1 F-bodies ('98-'02):
A4 trans, hot idle: 650rpm in park/neutral and 550rpm in gear
M6 trans, hot idle: 800rpm
Every single '98-'02 LS1 F-body idles at the above rpms unless there is something wrong with the car, or you have done custom tuning or made physical changes to the TB resulting in a higher/lower idle speed.
Keep in mind that no engine will idle at *exactly* the preset rpm, so you'll usually see some variance of +/- 25-50rpm from the preset speed (if viewed on a scanner).
Here are the factory presets for ALL years of LS1 F-bodies ('98-'02):
A4 trans, hot idle: 650rpm in park/neutral and 550rpm in gear
M6 trans, hot idle: 800rpm
Every single '98-'02 LS1 F-body idles at the above rpms unless there is something wrong with the car, or you have done custom tuning or made physical changes to the TB resulting in a higher/lower idle speed.
Keep in mind that no engine will idle at *exactly* the preset rpm, so you'll usually see some variance of +/- 25-50rpm from the preset speed (if viewed on a scanner).
07-01-2007, 12:15 AM
#7
Registered User
Join Date: May 2007
Location: Northern VA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
ya when we got our car, i saw it idleing at a tad over 500 or 500 on the dot in Drive, i thought it was strange but ya its normal.
Im used to seeing at least 600-700rpm in Drive.
Yes going off the factory tach.
Im used to seeing at least 600-700rpm in Drive.
Yes going off the factory tach.
