ok i recently converted my turbo'd gsr back to a straihgt ls motor....and finally got it running back on p75 ecu w/ o2 to boot! Only problem im having is every now and then ill kick a CEL...no change in driving or idle....just has a cel....now if i turn the car off...the cel magically dissappears....as if i pulled the ecu fuse and reset it....try and pull the code and i get nothing...

any ideas guys...even this one is stumping me

 

??? pull the code when the cel comes on...dont shut the car off...its not necessary to shut it off to pull the code

 

ya but even if i could pull the code...why is it reseting it...

 

mine does that on some codes as well....I just drive until I see the light come on...drive back home and jump the connector

 

ok ill give it a whirl when it comes back on....going for a cruize to see if i can make it throw a cel.

 

The code is already stored. You simply must pull it. The FAQ thread has a link.

The CEL does not stay on because the condition(s) causing it is not constant.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">The code is already stored. You simply must pull it. The FAQ thread has a link.

The CEL does not stay on because the condition(s) causing it is not constant.</TD></TR></TABLE>
your totaling missing my point...normally on any other car ive ever worked on...you can turn it off and back on and the code is till held until you reset the ecu or pull the battery...

soon as i ign off...the code is cleared...when i go to check it jumpin the service pin...all i get is a ecu response code....no trouble codes...comprede

 

Have you checked the ECU fuse? I don't know if the car would run if it were blown, but that could explain the memory loss.

 

hmmm i think its good...pulling it stops the fuel pump from priming...so considering it still runs...id assume its good...but ill double check tommorrow...couldnt get it to kick a code tonight...and its always so random...some days it does and sometimes it doesnt...

 

maybe you have a short somewhere in the ecu or in the power going to it and when you turn off the car it resets..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zachlange &raquo;</TD></TR><TR><TD CLASS="quote">maybe you have a short somewhere in the ecu or in the power going to it and when you turn off the car it resets..</TD></TR></TABLE>
that could be very well the problem...after de-turboing it a lot of changes were made...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drumking15 &raquo;</TD></TR><TR><TD CLASS="quote">
your totaling missing my point...normally on any other car ive ever worked on...you can turn it off and back on and the code is till held until you reset the ecu or pull the battery...

soon as i ign off...the code is cleared...when i go to check it jumpin the service pin...all i get is a ecu response code....no trouble codes...comprede </TD></TR></TABLE>

That is completely normal......... My integra would throw a code and as soon as I cut the car off the cel went away and would'nt come back on untill I drove it again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -Todd- &raquo;</TD></TR><TR><TD CLASS="quote">That is completely normal......... My integra would throw a code and as soon as I cut the car off the cel went away and would'nt come back on untill I drove it again. </TD></TR></TABLE>

it is never normal to have a cel come on for any reason, or for it to reset itself. it may be a common problem, but is not normal. there is a problem for sure, the seriousness of it just might not be very high.

 

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

it is never normal to have a cel come on for any reason, or for it to reset itself. it may be a common problem, but is not normal. there is a problem for sure, the seriousness of it just might not be very high.</TD></TR></TABLE>


I never said it was normal for a cel to come on, cel = check engine light. I said it is normal for a cel to come on and after you turn the car off for it to go away. It has been my experience that it depends on the cel and what is causing the problem. Sometimes the cel will remain on even after you restart the car, sometimes it wont. There is a problem, check the code while the car is running.

 

thanks again for the insight guys...if i didnt have 8" of snow out id be out driving...this problem has stumped me for a couple weeks now...ive never had a problem dealing w/ codes...fixing the problem and clearing things up...

 

okey dokee. sorry for the confusion.