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Old 12-04-2016, 08:40 PM   #7
MikeCStig
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Join Date: Dec 2012
Location: Portland, Maine
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Re: Engine swap from October still not working PLEASE HELP

The H22A1 was one of the options available for the 4th generation Prelude and yours is a 4th generation (1992-1996), so it really shouldn't be that big of an issue. Even if yours originally came with an H23 (the non vtec one) it is still pre-wired for vtec. Here's the thing... the wiring is 22 years old, so you may want to change out the wiring harness for a fresh one and also make absolutely certain the ECU you're using is a specific match for the H22A1 and not any other H22 series engine. JDM and USDM ECUs are not always interchangeable, and 4th and 5th generation ECUs DEFINITELY arent interchangeable. You're better off making sure your engine and ECU are a 100% match.
One more thing about H22 series engines; when they say "premium fuel only" they absolutely mean it. These engines were built with a well above average compression ratio, so anything less than 91 octane and your engine won't run right. Spark knock, detonation, misfiring, etc will happen on regular fuel and damage the engine. Good luck and keep that Prelude alive, they really are an amazing car Honda should have never stopped making.
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