I own a 1992 Camaro Z28 with a stock 5.7L V8 350.

Since the day I bought the car in 1998, the car as far as I know has always been set to the same idle. I am being told by a friend who builds his engines and owns 2 3rd gen Camaro's that this is way too HIGH..

This is how the stats go:

[Factory 4-speed automatic /w overdrive, I HAVE A/C however pump is unplugged because the A/C is empty, and don't like the A/C]

a). Car in PARK - Idle is around 1250rpm
http://www.camarosource.ca/park_brake_on.jpg


b). Car in DRIVE - Idle just below 1000rpm (850-900rpm)
http://www.camarosource.ca/in_drive.jpg

I am being told it should be around 600rpm and that my Park and Brake rpm rating should not change?

Is this true?

Why is it being set to this if this should be like 600rpm?

https://www.thirdgen.org/newdesign/tech/tpimod2.shtml
seems to say the same as him (600rpm in drive) where as mine is like 850-900rpm...

 

Idle should be lower in D, around 600 is good. 750 or so in P I would think is ok.

 

If this is the case, why are they setting it completely backwards (Higher Rpm in Drive, lower in Park) and 1250rpm Drive, 850-900rpm in Park?

 

I don't know the answer to that, maybe some of the TPI guys can step in on this one.

I've never seen a car, that idles higher in D than P.

 

NOTE: Please re-read my post. I entered the RPM backwards..

The correct is

Idle (PARK) 1250rpm or so
Idle (DRIVE) 850-900rpm

Being told DRIVE should be around 600rpm

 

No helpful input here. But, I must say, beautiful ride.

 

I would say hook up a scan tool. Maybe your dash is off. My brothers 92 z28 dash is off by 350 rpms

 

Assuming your dash gauge is correct, You may need to do the IAC/TPS adjustments(assuming you have no vacumm leaks anywhere).

Brendan

 

When warm my car idles at 550 in drive and in park probably 650 or so. 900/1250 is too high. Reset your IAC and TPS(in that order).

 

never seen those gauges before, but i noticed that your car is still cold? or maybe thats just the way the gauges are, all cars are going to idle higher cold than at operating temperatures?

im pretty sure thats teh case?