Check AFM?

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talkbanana2000 - 20 Feb 2004 03:06 GMT

Someone said there was a way. 1985zx non turbo.

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Steve T - 20 Feb 2004 02:56 GMT

> Someone said there was a way. 1985zx non turbo.

The only valid way to test is replace with a known good unit. If it doesn't
rev over 2200 RPM, it's the AF meter. Replaced hundreds of them for this
problem and the AIV valve is what trashes them. It's the silver valve on
the drivers fender near the AF meter. Again reading the codes is a waste of
time and money. It's going to tell you the crank angle sensor is bad and
that isn't what's wrong.

http://www.olyonline.com/genlookup.asp?T1=830-725&B1=Go

That's about half what a dealer one costs.

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Steve

http://www.atlantaracing.com

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talkbanana2000 - 20 Feb 2004 18:09 GMT

I will have to check more closely. The "silver" things I noticed was a small cylindrical part with 3 tubes or wires coming out with one leading to a square part that's about 3 inches square. It must be one of these 2?

Thanks, John

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talkbanana2000 - 20 Feb 2004 18:33 GMT

Steve, these posts are slow to post, but I wanted to tell you , I'm seeing more of your info you gave to others on this subject in my "search" on this site. These are explaining in much more detail. Thanks.

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talkbanana2000 - 20 Feb 2004 17:06 GMT

OK Steve. Thanks for getting back. Beginning to see the light. If I disconnect AIV and plug, it sounds like it will prevent future probs? Thanks for extra info on AIV.

John

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talkbanana2000 - 20 Feb 2004 18:44 GMT

OK Steve, 10 inches behind(towards back of car) is a small tube that goes into large metal cylindrical tube(that AFM attaches to) that came from the small "silver" cylinder part. Can I pull this off and plug (also plugging where it came off? In the meantime I'll get a price on aA AIV valve. Thanks again.

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Steve T - 21 Feb 2004 02:52 GMT

> OK Steve, 10 inches behind(towards back of car) is a small tube that goes
> into large metal cylindrical tube(that AFM attaches to) that came from the
> small "silver" cylinder part. Can I pull this off and plug (also plugging
> where it came off?

As long as you block the exaust from dumping in -front- of the AF meter
through this bad valve, it's not going to ruin another meter. Whether it
will pass an emissions test is another story.

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Steve

http://www.atlantaracing.com

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talkbanana2000 - 20 Feb 2004 19:32 GMT

Ok Steve. Dealer cost on AIV valve is $200. As I asked on other post, can I plug this? My local parts store finds no reference to AIV valve, can't find on internet, and even the dealer took a while to get back on this part. I'm all ready to do job, except for this little important detail.

John

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