HELP!!! Car revs/idles around 8,000 rpm at start up!!!
 

I just finished my b16a2 swap into my 96 honda civic ex. When i got to start my car, the rpms redline immediately as if i was in full throttle (WOT). I cut it off immediatly to prevent any harm to my engine. Anyone have any ideas what the problem could be? Loose intake manifold? Bad primary 02 sensor? etc. THANKS!!!!

Do you have a throttlebody on the intake manifold?

that is really really bad for it... check ure throttle cable for being too short or stuck, could be something simple like that

Re: (allricedout)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allricedout &raquo;</TD></TR><TR><TD CLASS="quote">that is really really bad for it... check ure throttle cable for being too short or stuck, could be something simple like that</TD></TR></TABLE>

yea thats what i was thinking too...

Check the throttle body to see if there is anything keeping the throttle plate open. Happen to me once. I was like WTF! Turn out there was a rock that is hold the throttle plate open.

Re: (turb20_vtec)
 

HUGE vacuum leak. https://honda-tech.com/forums/images/smilies/emthup.gif

Re: HELP!!! Car revs/idles around 8,000 rpm at start up!!! (CSHornet60)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CSHornet60 &raquo;</TD></TR><TR><TD CLASS="quote">I just finished my b16a2 swap into my 96 honda civic ex. When i got to start my car, the rpms redline immediately as if i was in full throttle (WOT). I cut it off immediatly to prevent any harm to my engine. Anyone have any ideas what the problem could be? Loose intake manifold? Bad primary 02 sensor? etc. THANKS!!!!</TD></TR></TABLE>lol thats so funhny man .thats some scary shit if that happens especially when u just first start it!!! https://honda-tech.com/forums/images...s/emsmilep.gif when u start look, have someone look at the butterfly in the tb and checkif its stuck open or some shit

Re: HELP!!! Car revs/idles around 8,000 rpm at start up!!! (raphael)
 

I took off the throttle cable and it still happens! SUCKS!!! I do have my throttle body on. I will check and see if my plate is stuck open. Also... where would i check for vacuum leaks?

oh... and YEA it was some scary S***!!! I thought i blew my engine but i did a compression test, same results as before start up https://honda-tech.com/forums/images...es/emsmile.gif

Re: (turb20_vtec)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turb20_vtec &raquo;</TD></TR><TR><TD CLASS="quote">Check the throttle body to see if there is anything keeping the throttle plate open. Happen to me once. I was like WTF! Turn out there was a rock that is hold the throttle plate open. </TD></TR></TABLE>

Man luckily it was stuck good and didnt get sucked in...

Re: HELP!!! Car revs/idles around 8,000 rpm at start up!!! (raphael)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raphael &raquo;</TD></TR><TR><TD CLASS="quote">lol thats so funhny man .thats some scary shit if that happens especially when u just first start it!!! https://honda-tech.com/forums/images...s/emsmilep.gif when u start look, have someone look at the butterfly in the tb and checkif its stuck open or some shit</TD></TR></TABLE> to check for vacuum leaks, get a can of carb cleaner while car is running and spray it around the intake area if it revs higher than theres a vacuum leak. and just follow the mist to find the leak. but in ur case ur car is revving way to high rite in the beginning. try starting it again and take 1 or 2 of the spark plug wires off so that it idles lower https://honda-tech.com/forums/images/smilies/emthup.gif