redline idle!

[SilentSeraph]

According to my dad, he was getting onto the freeway and once he shifted to 5th, the engine just went to redline (6.7k I believe). He stopped the car and turned it off. When he started the car again it revved straight to redline. I saw it first hand later on. We initially thought it was the throttle cable since it was very loose, but when we tightened it, it still had a high rpm idle.

Now I did research, and I found people had surging or high rpm idle problems going to around 3k, but I couldn't find a story of anyones motor idling past 4k or redline. Could it still be the IACV or FITV, or something causing a vacuum leak?

The car is a 92 LS Integra, with a B18B1 swap. I'm going to tinker around more and hopefully fix the problem. Thanks everyone.

[Death-the-Kid]

how are the spark plugs and is the check engine light flashing?

[Esteban8657]

U guys tightened the throttle cable with high idle????
Have u guys considered loosening it?

[SilentSeraph]

Originally Posted by Death-the-Kid

how are the spark plugs and is the check engine light flashing?

The sparks plugs were changed less then a year ago. I'll give you answer on the check engine light later as my dad went out and took the keys with him.

Originally Posted by Esteban8657

U guys tightened the throttle cable with high idle????
Have u guys considered loosening it?

The cable was already very loose when it had a high idle, so we tightened it.

[Death-the-Kid]

Originally Posted by SilentSeraph

The sparks plugs were changed less then a year ago. I'll give you answer on the check engine light later as my dad went out and took the keys with him.




The cable was already very loose when it had a high idle, so we tightened it.

you did not answer my question. how are the spark plugs. not when were they changed :-P

[SilentSeraph]

Originally Posted by Death-the-Kid

you did not answer my question. how are the spark plugs. not when were they changed :-P

Ha sorry. I assumed that since the spark plugs were changed recently they'd still be good. I'll check them out in a bit.

[codenamezero]

the throttle cable is suppose to be loose (have some slack)... i hope you guys didn't tighten all the way down... because that means you are basically having it opened full throttle...

[Death-the-Kid]

Originally Posted by SilentSeraph

Ha sorry. I assumed that since the spark plugs were changed recently they'd still be good. I'll check them out in a bit.

take a pic with your cell an post it

[Da8xsi]

Originally Posted by SilentSeraph

The sparks plugs were changed less then a year ago. I'll give you answer on the check engine light later as my dad went out and took the keys with him.




The cable was already very loose when it had a high idle, so we tightened it.

its possible that your throttle body is stuck open.. Does it rev up really fast to red line? or is it gradual? there is a spring that wraps around the throttle cable housing connected to the throttle body. Try to check that. if it seems fine, there is a screw located beneath the throttle cable tensioner, check to see if its keeping your throttle body open. Its possible that if the cable was really loose after this issue that tightening it may keep it in the open position. Try to take the throttle cable off the Throttle body, take the intake off and press the flap inside closed.

[95lscoupe]

Make sure there arent any open holes between the air filter and head. I took off my evap stuff and had a rubber plug closing the port on the IM. It fell out once and the car did the exact thing your describing.

[SilentSeraph]

Originally Posted by Death-the-Kid

take a pic with your cell an post it

The sparks plugs were fine. I know that for sure.

Originally Posted by Da8xsi

its possible that your throttle body is stuck open.. Does it rev up really fast to red line? or is it gradual? there is a spring that wraps around the throttle cable housing connected to the throttle body. Try to check that. if it seems fine, there is a screw located beneath the throttle cable tensioner, check to see if its keeping your throttle body open. Its possible that if the cable was really loose after this issue that tightening it may keep it in the open position. Try to take the throttle cable off the Throttle body, take the intake off and press the flap inside closed.

Yes, the throttle was stuck open. There was a piece of plastic stuck in there. I don't how it got in there, but once we removed it all was fine. We then adjusted the throttle cable to get the specified idle.

Thank you everyone for your help!

[leteg98]

It sounds like a vacuum issue to me. I once left a vacuum port unplugged on a car I was working on and it immediately revved up towards redline at start up.

Have you replaced any vacuum hose or worked on a system that pulls vacuum lately?

Never mind I just saw your last post... reading pwns me haha.

[95lscoupe]

Just so you know, you dont adjust the idle with the throttle cable. You adjust it with the adjustment screw on the throttle body.

[Da8xsi]

Originally Posted by SilentSeraph

The sparks plugs were fine. I know that for sure.



Yes, the throttle was stuck open. There was a piece of plastic stuck in there. I don't how it got in there, but once we removed it all was fine. We then adjusted the throttle cable to get the specified idle.

Thank you everyone for your help!

No problem man. Glad it wasn't somthing more serious. If I were you i would try to track down where that piece came from and if possible fix the issue. It would of been big problems if it had made it into the cylinder head.