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Old 07-12-2007, 02:31 AM
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Need a pinout diagram for 89 caprice

I bought an 86 astrovan with an 89 TBI 350 from A caprice. It has the 89 ecm but has no wire for the I.A.T sensor. I need the diagram to figure out where to plug the wire for this sensor into the ecm.
Thanx in advance.

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Old 07-12-2007, 08:49 PM
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Doc here,

Auto Zombie has complete manuals for your Van..pick up one there..about $21.00 Fazools each..

You can also order them online, for about twice the price..

The local COUNTY MAIN public library is another good source for free..

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Old 07-12-2007, 09:05 PM
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Im in Canada, no autozone here. But thanks.
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Old 07-12-2007, 09:34 PM
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Doc here,

order it here online:

manuels

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Old 07-13-2007, 09:40 PM
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Doc here,

Here ya go:



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Old 07-13-2007, 09:57 PM
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Old 07-13-2007, 10:01 PM
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Which diagram is this? It says 4.3L on top right.
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Old 07-13-2007, 10:13 PM
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Doc here,

Body wiring dosen't differ that much if at all AND I thought that was what you needed..

I guess you just better order one online.

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Old 07-13-2007, 11:32 PM
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Hmmm? Ya for some reason i cant seem to find an I.A.T sensor in the 4.3 diagrams. My van didnt have one originally but the caprice did.
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Old 07-13-2007, 11:55 PM
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Doc here,

Sounds like you may have a problem if this is a swap..

a good auto electric shop is in order.

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Old 07-14-2007, 12:12 AM
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The swap is done and it is running but he didnt add the wire to the harness and plug into the ecm for the I.A.T sensor. It sets the code for it and puts the computer in limp mode. It seems to run a little rich as well.
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