My friend sprayed nitrous in his GSR Integra, but then the vaccum hose came off the fuel pressure regulator and the car started to have a jumping idle. We put the hose back on and now it stopped jumping, but it's reving at 3000 rpm. Sometimes, it still does the jumping idle 1000 to 3000 rpm. Any clues to what this problem could be? He already tried cleaning the idle air control valve and the problem still persists. Thanks! The GSR still runs strong and the VTEC still pulls hard. We just can't figure out why it idles high and jumps sometimes.

 

did you jump a rib on the timing belt? threw off the timing?

 

That's what we thought, but the timing is on perfect at TDC. Just can't figure out what is going on.

 

Changed out the IACV and still problem continues. Tested my old IACV on my friend's GSR and it idles fine. Any clues? Thanks!

 

i was gonna say to change it out but i see u tried already.. ummmmmmmm idk lol good luck

 

Take and light a ciggarette. Run it around the intake manifold and everything intake on your engine. Hopefully the smoke will get sucked into the motor and you"ll find your vacuum leak. You probably popped the intake manifold gasket out. Thats what i did to mine

 

better hope u have no fuel leaks

 

yea... don't do that. lol
use carb/TB cleaner to locate a vacuum leak. do that by spraying parts of your vacuum lines while the engine is running and seeing if the idle changes.


OP: It could be the FITV. When the engine is warmed up, put your finger over the ports in the throttle body that go to the FITV. You should not have vacuum in any of those ports.



(I'm in the Integra section because of a search and figured I would try to help since I saw this. lol)

 

He'll be fine. They proved on mythbusters that a cig can't xatxh it on fire like in the movies, it just gets put out. But if you don't wanna use a cig, get a spray bottle full of water and spray it along ur manifold. If you have a good leak the water will suck up and ur motor will bog. Also try to cover the top hole inside ur throttle body with ur finger and see if that takes the idle back to normal. If it does cover it up with some electrical tape

 

LOL
You do know that you aren't suppose to suck water into the engine, right?



Or he could actually fix the problem instead of rigging it and risking possibly sucking electrical tape into his engine...

 

First off [edited - don't resort to name calling] the water won't do anyrthing to the motor. He is just searching for a vacuum leak, its not like he is running it in his fuel tank. And I'm just offering ways to fix his problem. Granted its not the right way (electrical tape) but it will work. If he has fixed his iacv and fitv, and there is no leak on the IM then that hole is the only thing I've EVER found to fix the problem.

I've had this same problem on my gsr. Clean fitv, NEW iacv, NEW sensors and TB, replaced BOTH Intake mani and TB gasket. I basically replaced the whole intake side of my head and the electrical tape made it pur purrfect.

To the OP, just try the smoke idea, if u don't find it try covering the hole with a finger. If it fixes it, find the right way to fix it or plug the hole. I'm sure its what it is and I even learned to plug that hole from Honda-tech.com

 

does it do it when you disarm the nitrous? i had a problem just like this wwhen i had nitrous.. the nitrous button was messed up and was spraying nitrous all the time.. disarmed it and it would stop.. i had to get a new micro switch..

 

Yeah, i took out the nitrous and no more spraying for me! Well, I found that my #1 cylinder was flooded with oil when taking out the spark plug. I stuffed napkins in there to remove it and now it doesn't rev up, but it revs high, like around 3500 and stays there. Any more opinions? Thanks you all the above posts!

 

Opinions???? Uhhhh, haha, how about, figure out why the cylinder was filled with oil? Lol.


*Cringes at the thought of another "nawz blowed up my moter" thread...*

 

Don't resort to calling names. Only makes you look childish. I have no intention of calling you names, so why you gotta try to turn this into a pissing contest?

I'm not saying spraying water on the intake manifold will give him problems.

However, you said "If you have a good leak the water will suck up and ur motor will bog.." If it actually "suck[ed] up" like you said it would, he would have some serious problems.

 

Leaking nitrous solenoids will cause a motor to rev up. Close the valve on the bottle and see if this abnormality continues.

 

fawk nitrious

 

If only a small amount of water is sucked into the engine, it will just turn to steam and get blown out the exhaust. Only when the volume of water exceeds the combustion chamber volume do you start bending rods and valves, etc.

 

Thank you for the clarification/explanation.

 

My bad


Hope you get it fixed OP

 

Map sensor and TPS? Unplug both and see if problem changes at all. One at a time.