Idel Speed 88 Corvette
Thread Starter
Heel & Toe
Joined: Oct 2000
Posts: 18
Likes: 0
From: Bakersfield,CA,USA ca
Idel Speed 88 Corvette
I know the computer is supposed to controls the idel speed. The manual says the speed should be between 400-450 RPM. Seems to slow to me. What should the speed be out of gear with an auto tran? Is there a procedure to set the speed from scratch?
Team Owner
Joined: Sep 2001
Posts: 62,159
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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Re: Idel Speed 88 Corvette (Bobmillert31)
Mine idles at about 6-700 rpm in drive, and about 7-800 in park.
There is a procedure for setting the TPS correctly, on 65Z01s site.
There is a procedure for setting the TPS correctly, on 65Z01s site.
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Re: Idel Speed 88 Corvette (Bobmillert31)
Idle speed for an '88 with stick or auto is 450 RPMs. You will need two special tools:
balance manometer (J-23951) and idle air valve plug set (J-33047), and instructions. It might be best to have an experienced tech do the work.
balance manometer (J-23951) and idle air valve plug set (J-33047), and instructions. It might be best to have an experienced tech do the work.
Drifting
Joined: Aug 2001
Posts: 1,550
Likes: 27
From: Minneapolis MN
Re: Idel Speed 88 Corvette (Bobmillert31)
Is there a procedure to set the speed from scratch?
Melting Slicks
Joined: Oct 2000
Posts: 2,158
Likes: 9
From: N.E. WA
Re: Idel Speed 88 Corvette (Oldman)
I would guess that it would be around 750 rpm. My first question is: what is your idle speed. Second: What is going on that you need to adjust your idle. Maybe there is a problem.
Melting Slicks
Joined: Apr 2002
Posts: 2,118
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From: St. Charles, MO Route 66 Corvette Club
Re: Idel Speed 88 Corvette (Bobmillert31)
I have a 89 coupe and the idle adjustment is very easy......if you can follow a procedure. You need a tach, voltmeter and that is about it. It is a good idea to set the timing before you make this adjustment. Email me if you want a procedure. I use the procedure as described in the Helms manual. Regards, Sam
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Re: Idel Speed 88 Corvette (Sam Lam)
Bob, search for the procedure to do the Idle Air Control valve(IAC). No special tools needed just a paper clip. While your at it buy some throttle body cleaner and clean that TB. When you get around to it do the TPS you'll need a good voltmeter for that.
Thread Starter
Heel & Toe
Joined: Oct 2000
Posts: 18
Likes: 0
From: Bakersfield,CA,USA ca
Re: Idel Speed 88 Corvette (Bobmillert31)
Thanks for all the HELP. I should should be able to make the adjustment now. The reason I need to do the adjustment is the pervious onwer instead of maintaining the car just adjusted the idel set screw on the TB to correct any problems.
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Burning Brakes
Joined: Apr 2002
Posts: 755
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From: Patterson CA
Re: Idel Speed 88 Corvette (Bobmillert31)
I know the computer is supposed to controls the idel speed. The manual says the speed should be between 400-450 RPM. Seems to slow to me. What should the speed be out of gear with an auto tran? Is there a procedure to set the speed from scratch?
The 400-450 is your "base" idle, that's with the timing wire unplugged. After you set it and plug the wire back in your idle should be between 600-700.
