the check engine light is on and wont go off the code is comeing up as a tempeture problem the light comes on as soon as i start my car any ideas of what it could be?

 

ECT (engine coolant temp) sends the coolant temp signal to the ecu.... if it is no good or the wiring is messed up then it wont activate vtec... i know when mine was bad it though it was -44 degrees. so it ran super rich.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepyH22 &raquo;</TD></TR><TR><TD CLASS="quote">ECT (engine coolant temp) sends the coolant temp signal to the ecu.... if it is no good or the wiring is messed up then it wont activate vtec... i know when mine was bad it though it was -44 degrees. so it ran super rich.</TD></TR></TABLE>

True dat.

The ECT needs to be functioning properly (your engine has to be warmed up) for VTEC to engage.

Change out the sensor, it's towards the front of the block, under the dizzy (tho above the transmission) on a B series...then again you really haven't told us anything about your car....so I can't help you any further than that...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16bswap &raquo;</TD></TR><TR><TD CLASS="quote">the check engine light is on &lt;snip&gt; the code is comeing up as a tempeture problem</TD></TR></TABLE>

... theres a problem with the temperature sensor. Spend a couple seconds thinking next time....

 

we changed the tempeture sensor and it stayed on and it has been backfiring that could mean its running rich right? there is no oxygen sensors on it could that be a problem?

 

what ECU and map are you running??

 

obd1 and im not sure on the map

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16bswap &raquo;</TD></TR><TR><TD CLASS="quote">there is no oxygen sensors on it could that be a problem?</TD></TR></TABLE>

thats a dumb question...yeah thats a problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16bswap &raquo;</TD></TR><TR><TD CLASS="quote">obd1 and im not sure on the map</TD></TR></TABLE>

is it a p28 or what??? chipped?? we need some more info... and you will need a 02 sensor before anything starts to work right.

 

dont mean to thread jack but i dont want to make another useless post. My best bud picked up an EG hatch with a usdm gsr swap. Vtec is at about 6000-6200 its pretty high so it falls out of vtec, at 75 on the highway its in the high 3k's so im thinking its most likely an LS tranny. What could cause vtec to kick in so late? oil pressure is fine, no cels, coolant temp is fine. I told him the ecu tells it when to activate so it might have been chipped/modified. What you guys think?

 

its all run by ecu man ^^^^

 

yeah thats what i told him it tells the solenoid with voltage to lock the pins on the rockers.

 

ya... just go get it tuned and you can adjust that. my b16 cracks at the factory 5800 pretty hard... nice kick point IMO

 

yeah its just got a skunk 2 i/m, itr cams, dc header, thermal research & d exhaust. Not sure if its chipped/tuned the vtec is just pretty high 6000-6200. Im going to open up the case this weekend see if its socketed or not. Its got a B&M pressure regulator and guage which is kinda weird cuz there isnt a need to change fuel pressure at idle it sits at 45psi~ i think stock is 43.5 psi? Might have had a nitrous kit on it in the past who knows. Trying to convince him to throw a 50/75 wet shot on it. Should put him at 205+wp with a 50 and with a 75 shot like 235whp+ or so depending on how the motor responds

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16bswap &raquo;</TD></TR><TR><TD CLASS="quote">the check engine light is on and wont go off the code is comeing up as a tempeture problem the light comes on as soon as i start my car any ideas of what it could be?

</TD></TR></TABLE>

You might have your VTEC solenoid plug and your CTS plug switched. Try switching them around. Unplug the battery to clear the ECU code. Turn it on and see if the light is still on. It's a very common mixup. The plugs are the same and in a nearby location.

Green plug goes to VTEC. Gray/black/dark plug goes to CTS.