How to use Sea Foam Spray on an engine with throttle body injection? [SOLVED]

I have a 1988 GMC Jimmy with throttle body injection. Is it best to just spray down the throat like a carbureted engine? Engine is a 5.7L 350.

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Jim D.
Jim D.
3 years ago

Hi Terry. Yes, a throttle body injection intake form the late eighties is not going to have a mass airflow sensor (like newer fuel-injection engines), so works just like a carburetor intake where you can spray into the throttle valve opening without having to put the air boot back on.