V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

2.8l RPMs

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Old May 24, 2006 | 07:36 PM
  #1  
84'Firebird's Avatar
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From: Minnesota
Car: 84' Trans Am
Engine: 5.0 H.O. L69
Transmission: 700R4
Axle/Gears: 3.73 Disc Brakes
2.8l RPMs

I have a 1984 bird with the 2.8l, carb and when i start it its rpms r at 600rpms. then when the car reaches full temp(200f) the rpms raise too 1000rpms. Is this normal for this engine or is there a problem with it? Also what is the normal oil pressure 4 these engines when its at full temp.(on the stock oil gauge) please let me know if u know anything about this. thanx
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Old May 24, 2006 | 09:17 PM
  #2  
xplane's Avatar
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From: Kansas
Car: 85 camaro sport coupe
Engine: 2.8 MFI
Transmission: v6 700R4 wish it was a 5spd Stick
Axle/Gears: Stock non posi 3.42s
im not definatly shure but all the engines i have ever seen have always droped in RPM when they warmed up. most not nearly as much as these V6s do but some of them do. my car does the exact oposite. start jumps to 1000 then after about 20-30 seconds it slows to 600 and stays there for there rest of the time till the car is shut off. I have MPFI so mabe that makes a difference but i really dont think it does.
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Old May 24, 2006 | 10:07 PM
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2_point8_boy's Avatar
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From: Castaic, CA
Car: 1988 Camaro RS
Engine: 2.8L of Raw POWER!!!
Transmission: Stick Shift
Axle/Gears: 3.42's
It should be at fast idle on cold start after you set the choke and then slow down once the engine is warm and the choke is open.

First off, make sure the choke is working properly.

Then put the carb on the top step of the fast idle cam. Then turn the screw until you have reached the fast idle spec that should be on the underhood emissions label.

Then make sure the carb is off the fast idle cam and set the base idle speed.

This should help you out a little.
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Old May 24, 2006 | 11:17 PM
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1988CamaroSC's Avatar
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From: Adirondacks, New York
Car: 92 Camaro RS
Engine: 5.0L
Transmission: AUTO, 56k orig
cold starts i get 60+ oil psi, idling about 30 psi warm, but all around cruising/highway i get 40-45 psi.
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Old May 25, 2006 | 10:35 AM
  #5  
84'Firebird's Avatar
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From: Minnesota
Car: 84' Trans Am
Engine: 5.0 H.O. L69
Transmission: 700R4
Axle/Gears: 3.73 Disc Brakes
Originally Posted by 2_point8_boy
It should be at fast idle on cold start after you set the choke and then slow down once the engine is warm and the choke is open.

First off, make sure the choke is working properly.

Then put the carb on the top step of the fast idle cam. Then turn the screw until you have reached the fast idle spec that should be on the underhood emissions label.

Then make sure the carb is off the fast idle cam and set the base idle speed.

This should help you out a little.
Ill try this out this weekend, i was afraid if i tampered with the idleing it may mess things up. thanx 4 the help.
----------
When its cold it idles about 1500rpms intil i kick it down then it goes down to 600rpms. but ill try adjusting it this weekend, thanks 4 all the help guys.

Last edited by 84'Firebird; May 25, 2006 at 10:38 AM. Reason: Automerged Doublepost
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Old May 26, 2006 | 03:17 AM
  #6  
sogabe's Avatar
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Joined: May 2006
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From: NorCal
Car: 91 Camaro RS(RealSlow)
Engine: 3.1L
Transmission: 700R4
Axle/Gears: unknown/mostlikelycrappy
if u wanna raise ur oilpressure,
get engine oil cooler,
and use thicker oil than 10-30..
works great.
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