Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

code 21 VTEC spool solenoid valve ?

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Old Apr 16, 2004 | 10:48 AM
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Default code 21 VTEC spool solenoid valve ?

ok im getting this code i have no clue what to do about. i only know it has to do with the vtec so ne help on this would be great thanks
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Old Apr 16, 2004 | 10:50 AM
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Default Re: code 21 VTEC spool solenoid valve ? (duckmanEG)

plug came lose? valve got clogged up.
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Old Apr 16, 2004 | 10:53 AM
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Default Re: code 21 VTEC spool solenoid valve ? (2lua)

how can i clean the valve
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Old Apr 16, 2004 | 11:03 AM
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Default Re: code 21 VTEC spool solenoid valve ? (duckmanEG)

ok thanks it wasnt on all the way just on but wasnt all the way up to click on u know what i mean, thanks thou
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Old Apr 16, 2004 | 11:06 AM
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Default Re: code 21 VTEC spool solenoid valve ? (duckmanEG)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by duckmanEG &raquo;</TD></TR><TR><TD CLASS="quote">how can i clean the valve</TD></TR></TABLE>

there are three 10mm bolts held the vtec assmebly to the head, remove those botls , and unplug the vtec soleniod and pressure switch plug, and behind it there is screen remove it carefully then clean it with some brake cleaner and put it back. then remove the top three 10mm bolts and check the vtec pressure switch for movement if it move up and down then the valve is normal.

if the vtec it is still not work then you need to check the resistance of the vtec soleniod to see it got the proper value ( 14-30 ohms). if it does not then you have a bad vtec soleniod.
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Old Apr 19, 2004 | 12:15 PM
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Default Re: code 21 VTEC spool solenoid valve ? (2lua)

will this cause it to not rev past 3500
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