over revved, vtec turning off and on - Honda-Tech

zex_cool · 05-13-2008, 11:46 AM

this happened to my friends stock 99 gsr last saturday night. we were on the freeway and he missed 4th gear and accidentally went into 2nd form 3rd. i was behind him when he did this and there was a LOT of black smoke for a few seconds.
he pulled over right away and everything seemed to working normal, idling fine, no ticking sound or anything like that.
today he calls me and says that his vtec keeps turning off and on. he said everything sounds normal when driving but only in vtec does it start acting up.

any ideas ?

vtecb18c · 05-13-2008, 12:11 PM

sounds like bent valves...slightly bent not enough to make noise. a friend of mine went from 2nd to 1st instead of 3rd on his type r and bent valves...you would have to put your head on the valve cover to even hear it

zex_cool · 05-13-2008, 09:41 PM

Quote:

Originally Posted by vtecb18c

sounds like bent valves...slightly bent not enough to make noise. a friend of mine went from 2nd to 1st instead of 3rd on his type r and bent valves...you would have to put your head on the valve cover to even hear it

thanks. ill have him bring it by some time this week.

anyone have any other suggestions ?

MikeSarr_GSR · 05-13-2008, 10:48 PM

the head needs to be pulled and everything inspected. this is common when drivers get excited and zing a motor. any number of things can happen, it sounds like to me that the motor is losing compression. take it to a tech that can show you what happened in reality, replace the bad parts and learn how not to go into 2nd from 3rd at 8500 rpm!

05-13-2008, 11:46 AM	#1
zex_cool Join Date: Mar 2006 Location: Witness, Protection Program Posts: 959	over revved, vtec turning off and on this happened to my friends stock 99 gsr last saturday night. we were on the freeway and he missed 4th gear and accidentally went into 2nd form 3rd. i was behind him when he did this and there was a LOT of black smoke for a few seconds. he pulled over right away and everything seemed to working normal, idling fine, no ticking sound or anything like that. today he calls me and says that his vtec keeps turning off and on. he said everything sounds normal when driving but only in vtec does it start acting up. any ideas ?

05-13-2008, 12:11 PM	#2
vtecb18c Senior Member Join Date: Mar 2008 Location: Wanaque, nj Posts: 2,139	Re: over revved, vtec turning off and on (zex_cool) sounds like bent valves...slightly bent not enough to make noise. a friend of mine went from 2nd to 1st instead of 3rd on his type r and bent valves...you would have to put your head on the valve cover to even hear it __________________ 92 DX NA GSR 218WHP tuned w/Crome WTB H22 block(stuffed not bare) YESSIRR I'M BACK!! IM DROPPIN THE HAMMER HARRY" I ♥ my Honda

05-13-2008, 10:48 PM	#4
MikeSarr_GSR Join Date: Feb 2002 Location: Behind The Camera,, FL, USA Posts: 2,684	Re: over revved, vtec turning off and on (zex_cool) the head needs to be pulled and everything inspected. this is common when drivers get excited and zing a motor. any number of things can happen, it sounds like to me that the motor is losing compression. take it to a tech that can show you what happened in reality, replace the bad parts and learn how not to go into 2nd from 3rd at 8500 rpm!

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