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Discussion Starter #1
Sometime in the past week, the van has stopped starting with a fast idle.

Before this, when I turned off the engine I would hear a whine like a small motor. When I next started the engine it would idle fast for a moment or two before shifting down to a lower rpm idle.

Because it's the summer, the van still starts but once it turns cold I'm sure it won't continue.

I don't have the terms for these parts so it's hard to even look them up in my Haynes book.

If anyone could give me a description of what's going on (or not, at this point) and some possible causes, that would be great. Thanks.
 

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Any fault codes or 'ck eng' light? There is an electro-mechanical throttle (AIS) motor on the side of the throttle body on early TBI engines. See #16 here.
It may have stripped its plastic gears if the push stem is no longer moving the throttle lever open and closed. It may not set a code.
Haynes may not offer much detail on EFI components.

 

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Discussion Starter #3
No check engine light.

Just doesn't go through the windup it used to do after the ignition was turned off and doesn't rev at high rpm for a few moments after the engine catches at startup.

I'll look into a pay pal account so I can buy the 1989 service manual on eBay.

thanks.
 

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Discussion Starter #4
The automatic idle control motor seems to be running again. I've had the van in a shop for a week and when he started it up after the repairs he said it wound up as normal and it did it again for me on the drive home.

The morning I drove the van to the shop I had to boost it because the battery was so low. The mechanic said he had no problem with the battery when he started it up.

I wonder if there was something grounded out on the AIS motor and that was draining the battery. Time will tell I guess. I won't bother changing the unit until the problem returns.
 
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