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Old 02-07-2013, 03:20 AM   #1
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Default Hello from Sacramento

Picked up this 1990 last weekend for $650 it supposedly only needs a head gasket and I'm planning on tearing into it this weekend to see how bad it really is.

So far i'm just here to read and research.
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Old 02-07-2013, 10:38 AM   #2
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Inspect the crank pulley for wobble on those '90's. Search for the symptoms and fixes on this forum.

Welcome to the forum.
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Old 02-07-2013, 02:29 PM   #3
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hello and welcome
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Old 02-07-2013, 02:33 PM   #4
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Good luck! If it's worse than expected, you can probably source a new motor, i.e. an 'upgrade' to the 1.8L.
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Old 02-07-2013, 03:41 PM   #5
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Sup.

This is Vladi

You may know me
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Old 02-07-2013, 07:00 PM   #6
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Welcome, Chris GTO TT!
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Old 02-07-2013, 07:31 PM   #7
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Quote:
Originally Posted by sixshooter View Post
Inspect the crank pulley for wobble on those '90's. Search for the symptoms and fixes on this forum.

Welcome to the forum.
Thanks for the tip, I had found some info on that already so it's already on my list of things to do.
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Good luck! If it's worse than expected, you can probably source a new motor, i.e. an 'upgrade' to the 1.8L.
That was my thought process too.
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Sup.

This is Vladi

You may know me
:lol: we can start a Miata section at the sac Subaru meats
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Old 10-22-2013, 02:40 AM   #8
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Welp I figured I'd bring this back up. Turned out the 1.6 needed more than a headgasket and I wound up sourcing a 1.8 and picked up a FM swap kit. I am in need of a decent 1.8 intake tube and still need to get the O2 sensor bung welded into the exhaust manifold.
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Old 10-22-2013, 02:48 AM   #9
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swapping to 1.8 is ALWAYS a good idea. no matter the circumstances
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Old 10-23-2013, 01:29 AM   #10
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Agreed as long as I can get it registered and drive it I'll be happy.
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Old 11-03-2013, 05:30 PM   #11
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Discovering the 1.8 swap intake setup is a giant cluster f***. Apparently no one really tells you that when you are shopping for parts.... At this point I'm really just wishing I'd found a decent running 1.6 so I could at least drive it. Bought it in Feb and still haven't gotten to drive it :(
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Old 11-03-2013, 07:55 PM   #12
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I understand there is a throttle body arrangement change, but I don't know about anything else. But I've never been there or done that.
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Old 11-04-2013, 11:46 AM   #13
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Any details on the trouble you are having? Like one connections/parts/etc. are not working out?

You might be able to get some quick answers/tricks if you throw out some questions.
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Old 11-11-2013, 03:55 PM   #14
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Basically the intake cross over tube and the fans want to inhabit the same location, we wound up taking the resonator bottle out and then cut the fan shrouds to allow room for the intake. It all works and after I got the fuel plumbed the correct way it fires right up. It does seem to chase the idle right after starting up and needs a little throttle to keep it running when it's cold and just started up. I think the idle control is bad.
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Old 11-11-2013, 05:21 PM   #15
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Nice!

Idle is a PITA... Throttle plate adjustment screw?
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Old 11-11-2013, 07:26 PM   #16
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no. dont mess with the idle screw at all. if its fluctuating the valve is probably bad or you have a vacuum leak.
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Old 11-11-2013, 08:08 PM   #17
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It'll act like a vac leak if it's open too far. An easy thing to check prior to going after the ISCV or vac leaks.
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Old 11-11-2013, 08:48 PM   #18
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Or you just need to adjust your idle fuel and spark cells to cause it to settle into a smooth idle.
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Old 11-11-2013, 08:58 PM   #19
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pretty sure he's on stock ecu
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Old 11-11-2013, 11:47 PM   #20
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Quote:
Originally Posted by 18psi View Post
no. dont mess with the idle screw at all. if its fluctuating the valve is probably bad or you have a vacuum leak.
Idle is set using standard 1.6 ECU methods... ground the TEN pin and set idle to 850rpm or so. Idle is rock sold except for cold start, requires throttle to be held open. Also when I hot start it the idle will hunt for a couple of seconds and then settle down.
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pretty sure he's on stock ecu
Yeah have to keep it as stock looking as possible for SMOG in CA...still worried about passing visual
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