i have a 91 hb si with a jdm b16a with a pwo ecu. some reason my v-tec is not kicking in, once i get aobut 6,000 rpm the check engine light comes on and throws the 21. i have the hasport v-tec wire harness( i also made one to try it out but it still didn't work) i check over where the pins should be in the plugs. my firend is gettin his pwo ecu in a couple of days n i'm goin to try his. what else should i look for?

 

Code 21 = Variable Valve Timing & Valve Lift Electronic Control Solenoid Valve (VTEC Solenoid Valve)

Take it apart and clean the screen out inside of it. Then reset your ECU. See if this helps.

 

what should i use to clean it out, do i remove the screen to clean it?

 

Unbolt the solenoid from the head. You'll see the screen immediately . To clean it just remove it and rub it down, or run some oil through it.

 

what else should i check for if this doesn't work?

 

If you are 100% sure your vtec wiring is correct, I suggest trying a diff. known good vtec solenoid on your engine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SEA Hag &raquo;</TD></TR><TR><TD CLASS="quote">If you are 100% sure your vtec wiring is correct, I suggest trying a diff. known good vtec solenoid on your engine. </TD></TR></TABLE>

i tried cleaning it out with the throttle body cleaner where the screen was and every thing, it still don't kick in but now the check engine lights come on at about 6,000 rpm.and yeah i'm for sure the wiring is right.

 

bump.............help please

 

run 12v directly to the solenoid, and it should produce a noticable click. Thats the easiest way to see if its opening. If you hear it clicking, then chances are its your wiring.

 

maybe you mixed up the sensors , one is vtp and the other is vts . on e is for the switch and one is for the solenoid

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja &raquo;</TD></TR><TR><TD CLASS="quote">run 12v directly to the solenoid, and it should produce a noticable click. Thats the easiest way to see if its opening. If you hear it clicking, then chances are its your wiring.</TD></TR></TABLE>
should i use the the car battery to test it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mysiqu &raquo;</TD></TR><TR><TD CLASS="quote">
should i use the the car battery to test it? </TD></TR></TABLE>

Yup.

 

21 for some reason reminds me of a knock sensor.. anyway, if you need help, let me know.. PM me.. i met you when you picked up Lt. Dan's yellow CRX, i have a B16a in my CRX Si.. and i live close by.. if you need help, i'm free like after 7 or so on weeknights.. PM me with a time and an addy..

 

any thing else should i check for?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja &raquo;</TD></TR><TR><TD CLASS="quote">run 12v directly to the solenoid, and it should produce a noticable click. Thats the easiest way to see if its opening. If you hear it clicking, then chances are its your wiring.</TD></TR></TABLE>

it does click...what else should i check for?

 

Damn help this kid he needs his vtec.....

 

go here:
http://www.acute.f9.co.uk/crx/...s.htm
download the "VTEC" supplement..
{It is in adobe acrobat which is a pain,but all the help you need is contained within}
After downloading;go to page 5-32 for a troubleshooting flowchart..


Modified by 88DXCRX at 7:38 PM 5/29/2003

 

rexman help me out today. seem to be just my ecu. does any one know what i can do to fix the ecu? i'm going to try a different ecu once i get my hands on one. sucks becasue i bought the ecu for $125.00 and the guy told me that it was working fine when he had it in his car..............


Modified by mysiqu at 8:13 PM 5/31/2003

 

ok just tired one of my firends pwo ecu he just got, with his ecu the car won't even start, it bogs out and threw code 15(Ignition Output Signal missing or defective ignition output signal) but with my ecu it starts.......wtf?(i want my v-tec)

 

bump