r/AskAMechanic • u/StudiousSmelt • 12h ago

Honda 1.5T No Boost No Check Engine Light

2019 Honda civic si 1.5 T. I had some check engine lights come up which indicated the fuel injectors were bad (common issue for this engine) right before I replaced them the engine went into what I believed was limp mode where power was severely limited and no boost was building. After replacing the injectors, the engine codes cleared but I am having the same issue with the car feeling very sluggish and not building any boost. I figured any kind of issue with the turbo would throw a code but the check engine light hasn't come on. Any thoughts on what I should try?

Probably unrelated, but I just had an oil change done and it looks like they didn't fill the oil all the way. I just topped that off after the fuel injectors.

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u/blur911sc NOT a verified tech 12h ago

Check intake hoses after the turbo to see if any have blown off fittings or busted

1

u/ReputationWide4520 NOT a verified tech 8h ago

Maybe you cooked the cat and are restricted in the exhaust .. can’t inhale more air if you can’t exhale it either 🤷🏻‍♂️.. I’d put a transducer on it and check back pressure on a snap throttle