Question about 1994 Honda Prelude

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H22 lag until 5k rpm

No power, lagging until 5,000 rpm

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Check fuel pressure, check camshaft belt, check for engine misfire, run fault code check by following instructions HERE

Posted on Sep 10, 2012

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Changing the intake, adding headers or adding a "performance chip" all have some benefits but never really give you the "advertised" increase. As far as those chips go, they generally work up around 4-5,000 rpm's and don't add much to everyday driving (read: worthless).
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Assuming no combustion chamber or fuel delivery faults, most turbo diesel engines exhibits this. The delayed is referred to as turbo lag and the smoke is fuel not completely burned since the fuel system tends to be a little rich when the turbo has not attained boosting RPM. Other than to have your injectors cleaned/replaced, the injector pump re-calibrated and/or the turbo checked for leakage, nothing much could really be done. Alternatives are to use fuel additives, re-check of the computer's map/software and/or change of driving habits. The idea is not to floor the accelerator until the turbo has reached the designated RPM where it kicks in.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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