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Old 06-03-2013, 09:43 PM   #1
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Default Rx7 440cc to miata direct fit!

So I've built a turbo kit from fuel pump to map/iat/tps/crank wheel. Now I'm stuck in the most simple part of the build my injectors. I started my car and I had a leak at the point of which injector lower seal meets with manifold and it's making my idle abnormal (1500rpm) I spray carb cleaner at the place of lower seal and manifold and my rpms seem to drop but then climb back up. Does anyone know what lower seal will fit my injectors and manifold. Or had anyone incountered this problem? I don't have a vacum leak in any hoses I've done numerous test for leaks and the injectors are the only problem I've had so far.
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Old 06-04-2013, 12:24 AM   #2
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Use the grommet listed at the Mazda dealer that's for an rx7, not the Miata one. I had this same issue years back when I ran rx7 460's.
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Old 06-04-2013, 11:52 AM   #3
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Interesting. I have a leaky #4 with all new seals, I'll have to try the lower RX-7 grommets sometime soon. Is there a noticeable dimensional difference?
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Old 06-12-2013, 12:15 AM   #4
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I've had no luck sadly, I went out bought the lower seal for all 4 injectors and still have a leak. I've tried everything!! Removing plastic bushings on rail to tighten it completely did notice a small difference in idle speed check leak and two/three still leaking. I even tried placing my "miata" lower seal as the grommet to see if it would push the injector lower and help seal the leak but no luck. I am 100% sure the leak is coming from the seals/injectors, once I spray carb cleaner the idle speed drops drastically since car is idling at 1800 rpm. Any other suggestions anyone?
On and Curly their is a major difference in "ID" from miata seals to rx7
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