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Sep 28, 2004 | 05:19 PM

lucky85

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Joined: Jan 2004

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From: midland tx

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I was wondering if anyone could tell me the following:

What is the factory fuel pressure for an 85 vette?

what is the proper procedure for setting the TPS voltage?

What is the proper procedure for resetting the IAC?

Any help would be great,I am just going through a checklist of possible causes for the car not running right.

Thanks in advance
CHRISTOPHER(LUCKY85)

Sep 28, 2004 | 07:18 PM

Steel Blue 91

Le Mans Master

Joined: Jul 2002

Posts: 5,818

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From: Alive and well in Burlington NC

Here's a tech tip for setting TPS:

https://www.corvetteforum.com/techti...D=55&TopicID=2

And one for resetting the IAC on a LT4 (should work on an early L98):

https://www.corvetteforum.com/techti...D=94&TopicID=2

Not sure on the fuel pressure on an 85 - 35 to 40 Lbs. seems to stick in my mind.

Sep 28, 2004 | 08:11 PM

CFI-EFI

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Joined: Sep 2000

Posts: 17,298

Likes: 33

From: The Top of Utah

Quote:

Originally Posted by lucky85

I was wondering if anyone could tell me the following:

1.) What is the factory fuel pressure for an 85 vette?

2.) what is the proper procedure for setting the TPS voltage?

3.) What is the proper procedure for resetting the IAC?

This is all in your service manual. If you don't have one, you'll need one to do much, without wasting a lot of money. Go HERE to order one.

1.) I THINK it's 37# on an '85.
2.) Key on, engine off. Loosen the mounting screws and rotate to obtain the correct voltage. For my '84, its .525 volts. plus or minus .075 volts.
3.) Again for the '84, to reset the IAC, drive the car, warmed up, at a speed over 35-40 mph.

RACE ON!!!

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