jdmEJchillen

watzup guys. i got a wierd problem with my vtec. lets see. i have a chipped p28 with vtec engagement at 5200. now wen i try to engage vtec , it acts like a redline, meaning it doesnt want to pass wen vtec is suppose to engage. There is no check engine light. no oil leak. i even checked da solenoid n you can hear the clicking noise. need help quick, tryin to get ready for a circuit event.. thanks..

jdmtunerchick

Has it done it sence you had your computer chipped or did it just start now? And who did you have it tuned by?

meandino

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmtunerchick &raquo;</TD></TR><TR><TD CLASS="quote">Has it done it sence you had your computer chipped or did it just start now? And who did you have it tuned by?</TD></TR></TABLE>

I woud take the ECU back. Have them fix the problem.

jdmEJchillen

naw the problem just started. ive had da ecu for a long time. i doubt its da ecu. i had da ecu wit my built cpt setup n nothin was wrong. anywayz i tried out my hb's ecu, only thing is his vtec engages at 5700. n it still does da same thing. i even tried a virgin gsr. same thing. weneva vtec is suppose to engage, it acts like a redline.

ho bag

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmEJchillen &raquo;</TD></TR><TR><TD CLASS="quote">naw the problem just started. ive had da ecu for a long time. i doubt its da ecu. i had da ecu wit my built cpt setup n nothin was wrong. anywayz i tried out my hb's ecu, only thing is his vtec engages at 5700. n it still does da same thing. i even tried a virgin gsr. same thing. weneva vtec is suppose to engage, it acts like a redline. </TD></TR></TABLE>

What that means is that the ecu doesn't see that the car is meeting all the requirements to engage vtec.

Mine does this too and its because the ecu doesn't see the vtec pressure witch turn my crossover point into a rev limiter.

jdmEJchillen

4realz datz weird. i dont have no check engine light. nothin. so wat should i do den?

meandino

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmEJchillen &raquo;</TD></TR><TR><TD CLASS="quote">4realz datz weird. i dont have no check engine light. nothin. so wat should i do den?</TD></TR></TABLE>

Would replacing the vtec solenoid do anything??

97Ej6mike

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meandino &raquo;</TD></TR><TR><TD CLASS="quote">

Would replacing the vtec solenoid do anything??</TD></TR></TABLE>

Absolutely nothing.

Check the wiring, double check to make sure everything is hooked up.

What motor is this by the way?

meandino

He has the P28. Maybe a D16Z6 ????

hybridmath

check the vtec solenoid screen i had similar problems with my gsr after break in after i cleaned it vtec worked perfectly

jdmEJchillen

itz a gsr. umm all da wiring is hooked up rite. ive triple checked it so many times. if it was hooked up wrong, den check code would come on. just to be sure dat da check code works, i unplug da solenoid switch, den run da motor, n check code comes on. but f i plug it, reset it. n den let da car warm up n try n engage vtec, nada. ive cleaned the screen a lot of times. everytime i check it, the oil is like new, no clogs, no dirt, no shavings, nothin.

meandino

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meandino &raquo;</TD></TR><TR><TD CLASS="quote">He has the P28. Maybe a D16Z6 ????</TD></TR></TABLE>

Samsonite, I was way off.

w0nd3r

check the dizzy too. it could be that too..

jdmEJchillen

watzup guys. thankz for the help. found out the problem. it was real simple. it was my silencer for my exhaust. there wasnt enough airflow causing increased back pressure puttin the motor into fail safe mode.. haha weird. on sunday mornin i was gettin ready to go to willow springs so i took my silencer off my exhaust. so den i was thinkin..hmm my motor will be runnin a lot smoother so i just reset the ecu n next thing u know, hittin the freeway my vtec worked..haha.. but its kinda loud so yesterday i put the silencer on n it does the same problem be4. but i aint trippin. i dont be racin on the streets or highways anymore. just too damn dangerous n risky with all those undercover cops around. ohh just givin u guys the heads up in southern cali.


UNDERCOVER CHP DRIVING BLACK EVO, WHITE INTEGRA WITH JDM FRONT END, GREEN CRX, RED S13 COUPE, WHITE STI, RED EG, WHITE EG, OLIVE GREEN EG, AND A SILVER 350Z. LOCATION IN LA COUNTY, ORANGE COUNTY AND ALL SURROUNDIN CITIES. IF U END UP RACING ONE OF THESE GUYS N DEN U EXIT, THERE'LL BE CHP OR LOCAL POLICE WAITIN FOR U. SO WATCH OUT GUYS. THIS IS NOT A JOKE. I GOT THIS INFO CUZ OF A FRIEND'S COUSIN WHO IS A U KNOW WAT.. HAHA..

97Ej6mike

A silencer should not put your motor into "limp" mode or kill VTEC. It may change the sound, but it surely would not disable VTEC.

jdmEJchillen

i know it sounds freaken weird bro. but itz true. the silencer creates so much back pressure to the extent where air flow is not flowin fast enough so prolly the ecu reads dis, therefore it goes in2 limp mode, so the motor doesnt overflow with fuel wen vtec is suppose to engage. cuz u know wen vtec engages more fuel is added. cuz u know during the cc process the exhaust fumes have to release in a perfect flow, so the process can happen all over again, if for any reason there is a disruption in the process den limp mode will happen. u prolly know dis but da reason y the exhaust fumes have to be release in a perfect flow is so dat the cc doesnt get too hot wen the process happens all over again, if its too hot n da process happens again, den the motor can detonate.