Im doing a 3800SC swap on my 87 fiero. my donor car 97 Riviera had custom intake and no IAT so im doing my harness and my pcm has inputs for the IAT ...what do I do?

Wire up an IAT & connector if you want it to run right.

The Fiero harness uses the same connector for the IAT.

[This message has been edited by phonedawgz (edited 02-20-2015).]

What's an IAT? My engine came from a 96 bonneville. Will I have the same issue?
Havent had the harness made up yet.

I know there's a MAF, IAC. And TPS On the throttle body.

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===Always trying to find time to work on cars===
Louis Duet
Baldwin, Long Island, NY
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"Blue" <= '85 Fiero GT
Stock V6---Stock everything. Trying to keep it 'mostly' that way. But I just got the 3800sc to swap into it!
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"Boo" <= '81 Delorean DMC-12
VIN #5835
Stock PRV engine
Peugot 604 Intake manifold
Exhaust headers
Anti-3rd brake light

Intake Air Temp

i looked up IAT for the car on ebay icant find any just the Idle air control valve. I use the IAT from the fiero huh I don't remember seeing one on my 2.5 duke, ill look again. my harness has no plug for the IAT so can I use any IAT ? or just play it safe use the 2.5 duke or maybe the 2.8 v6s IAT? hey thanks for the feedback!

84 - 86 2.5 Dukes use a hot air stove on the exhaust manifold to maintain a constant intake air temp so they don't have an IAT (aka MAT) sensor. Heating intake air so you don't need a sensor is a crappy way of doing it so GM went to the IAT for the duke in 87-88.

All 2.8s used an IAT.

You can use the 2.8 IAT in the air cleaner can along with the connector. It does have the same resistance curve as the 3800 sensor. Using the 3800 IAT however is a better choice.

I will order the 97 Riviera IAT money is no problem...thank you