i got a small problem with my car... Its 1.5 block with 1.6 vtec head.. my problem is vtec doesnt seem to activate,

(yes i did remove the jet in the block)

Lets say i punch it 1st gear it will go fast but once it goes past 6K it just takes longer to redline.. i have a small light connected to the vtec solenoid which gives out (+) so when it kicks in the light lights up

1st of all its a stock p28 ecu and my light comes on around 4800 rpm which i think is impossible? but i want to make sure vtec is acutally working??

any suggestions please let me know


Btw when i was done with the swap i fired the car up and i had a check engine light code(22)

i checked everything and everything was fine, i checked oil level and it was low i added about 1.5 quart and the check engine turned off ?

 

anyone? No more cel, and oil is leveled

 

The stock engagement point for a P28 ECU is 4800 RPM. So yeah, it's working fine.

If you're concerned about it, connect your VTEC light to the NEGATIVE terminal of the VTEC solenoid. That'll tell you that a connection was completed through the VTEC solenoid and that it activated. The light to the positive wire (A4?) just tells you the ECU sent the signal. The solenoid might be bad though. Connect it to the negative/ground, if it doesn't come on, then jump the VTEC solenoid to the battery to see if it's operational.

 

wheres the ground wire for the solenoid? i thought the vtec solenoid only had positive wire?

Maybe your talking about the ground wire from the oil pressure switch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbosol18 &raquo;</TD></TR><TR><TD CLASS="quote">wheres the ground wire for the solenoid? i thought the vtec solenoid only had positive wire?

Maybe your talking about the ground wire from the oil pressure switch </TD></TR></TABLE>

owned by the noob... haha negative termninal on the vtec solenoid.... plus the pressure switch wont tell you if the vtec solenoid is functioning that i know of.

couple questions, how long have you had the setup before you noticed a difference or is it something that was there right away? what transmission are you using? what gears, or is it all of them, are you in when it seems off?

 

well the motor was a complete 1.5 motor and i just replaced it with a vtec 1.6 head

i believe vtec is cracking now because on the highway at wot i hear the exhaust opening up a little bit louder.

i got a question, does a p28 ecu really hit vtec at 4800rpm? Also i noticed the vtec light i have, if i rev the car up past 4800 the light will turn on...I thought the car had to be rolling in order to hit vtec?