Vacuum Leak at fuel injectors. 1.8 NB Head, NA Manifold, NA 315cc injectors - Miata Turbo Forum -Boost cars, acquire cats.

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Old 12-20-2012, 08:29 PM   #1
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Default Vacuum Leak at fuel injectors. 1.8 NB Head, NA Manifold, NA 315cc injectors

Hey guys. I've got a vacuum leak at my fuel injectors at the isolator where the injector goes into the head. I've had this leak before. I replaced all the isolators and it went away for awhile, but now it's back.

I'm running a 1.8. NB BP4W Head, 1.8 NA Manifold with 1.8 NA Fuel Rail. Aftermarket 315cc injectors.

Do I have to use a special isolator for different injectors or the BP4W head?
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Old 12-23-2012, 03:34 PM   #2
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You are running an NA intake manifold on a NB head?

That won't work. Bolts line up but the ports aren't even close. That is your problem.
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