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Underbody braces, turbos and more!

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PostPosted: Fri Mar 15, 2013 9:42 am 
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Joined: Mon Mar 24, 2008 7:47 am
Posts: 124
I took a stab at doing this mod http://geometroforum.com/topic/4804867/1/ ( I know I know, but I wasn't able to find any references to this mod on this beloved forum)

I was worried about spring pressure so I cut my spring so its resting height would be just tall enough to seat the plunger. After 3 weeks of flawless function I'm starting to have erratic idle issues... mainly with the "rolling idle up" function. while decelerating, the idle will surge to just over 2k rpm then drop to 1k until the vehicle comes to a stop. Then it idles down like normal. Being that nothing has changed on the car/engine except for an oil change and trans fluid change I'm thinking my spring has fatigued a bit and is not providing enough resistance.

Anyone else have any thoughts or experience with this mod?

thanks!


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PostPosted: Fri Mar 15, 2013 1:04 pm 
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Joined: Sun Jun 10, 2012 8:12 am
Posts: 157
Location: Brainerd Minnesota
This may have happened to the plunger.

Image

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Your symptoms sound exactly, like what happened to me, when the plunger base let loose.

To fix the plunger, I cleaned really good with brake cleaner, dried with compressed air, and filled the void with Permatex RTV Red High Temp. Press the two pieces together, tape to hold, and let sit over night to dry. Sorry, I neglected to take a picture of the finished product.

I have over 12,000 miles on this IAC mod/repair now. Still operating as it should.

If the plunger is still OK, then you may want to stiffen the pen spring a little. Hope this helps.

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Extreme Make Over....SnowFish Addiction

1991 Metro Xfi Sport, Crower F12142 Cam, +2 degrees on adjustable sprocket, .020 Over, Balanced & Blue Printed, 3.79 final drive, WhiteLine Bushings Everywhere, 185/60R14's, TBI Bridge Delete, Edelbrock Air Cleaner, Stainless Header, 2 Inch Exhaust, Magnaflow GlassPack, Swift Twin Exit Muffler.


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PostPosted: Fri Mar 15, 2013 6:19 pm 
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Joined: Tue Oct 24, 2006 3:09 pm
Posts: 4998
Location: Palm Springs: Too hot from June to Oct.!
newby wrote:
Anyone else have any thoughts or experience?

thanks!

Not a problem, newby.
Where ever you are, the last thing you did to the car is probably what screwed it up.
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DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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PostPosted: Sun Mar 17, 2013 9:16 am 
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Joined: Mon Mar 24, 2008 7:47 am
Posts: 124
Thanks snowfish. I think Monday I'll have time to play with it. I'll post up some pics


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