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Old 03-18-2013, 03:12 PM   #1
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Default Injector insulators

Is there a difference between the 99+ insulators and the earlier ones? I can get a kit from oreilly that fits rx7 injectors. The dealer doesn't have the 99 insulators.
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Old 03-18-2013, 03:16 PM   #2
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Also I'm idling around 2200rpm all my vacuum Ports are accounted for. I did have 1 cracked insulator. Anyone else experience this kind of idle from a broken insulator? Idle is pretty smooth too.

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Old 03-18-2013, 04:22 PM   #3
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the heck is an insulator? o-ring?
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Old 03-18-2013, 04:35 PM   #4
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It's the part that goes between the injector and the head.

Mazda P/N JE06-13-257
Beck/ Arnley P/N 158-0431

there is actually a different one for 99+ part# 8574-13-257

I'm curious if there is actually any real difference between mentioned 3 products.

I'm idling at 35ish kpa @ 2200 rpm and I'd like to get that down. Upon inspection to look for vacuum leaks found I have a cracked one.

Obviously I need to replace those insulators. I'm also trying to track down my vacuum leak. Possible leaks I suppose are brake booster, injector insulator, intake plenum gasket, intake gasket.
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Old 03-18-2013, 04:42 PM   #5
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Those things should be the same, since they all interchange between the years.
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Old 03-18-2013, 05:23 PM   #6
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Hrmmm.... i need to look around for a cheap source for these. I'd like to buy like.... 40.
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Old 03-18-2013, 11:41 PM   #7
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i replaced them and apparently they weren't really leaking. I found the leak coming off the brake booster hose going from the manifold to the hard line. I just bought the $5 injector o-ring kit from O'Reilly. They give you a top seal and then those rubber grommets and an insulator. I don't see any reason why you couldn't use the rubber grommet spacer that's on the top side as a space/insulator on the bottom. they are the same interior diameter and same height. Oh well... they needed to be replaced anyway.
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