vteck1ck

I have a b18b1 with a b16 head and it idles at 2500 rpm. I have the motor in a 94 civic dx. The mods on the motor is a skunk2 intake manifold stock TB and a aftermarket fuel regulator. The timing is on point so wat can be the problem?

civickiller

a gasket is leaking. for example, my lsvtec was idling around the same rpm. i shot some break clean around the engine to see a idle change and i found it, was the intake mani gasket for me.

so shoot some break clean around the whole motor and see if theres a change in idle.

vteck1ck

Good idea! Bump for more help!

vteck1ck

Bump

habib

Did you check to see if the throttle cable is pulling the throttle open a little.

vteck1ck

Yea I even took the cable off.

civickiller

so the brake clean idea didnt work?

try block the 2 holes in the tb and see if that helps

thecruzs2007@yahoo.com

you sure you dont have your map sensor and tps plugs mixed up??

Jimster480

Do you have any CEL's? do you have a vacuum leak? becuase alot of the time there are openings on aftermarket manifolds that you have to plug something into or block off. Otherwise it will idle high.

vteck1ck

Brake clean didn't work. All vaccum lines are good. The MAP and TB sensors are hooked up correct, and the last time I checked I had a CEL for the O2 sensor. Could a blown head gasket be the reason?

kaiba

There are 2 types of throttle body. Make sure you use the correct gasket.

JosephColy

had a similar problem on my D15B swap, the intake manifold gasket will cause it to act like a vaccuum leak/blown head gasket. the brake clean test works well. try it all around where the ITM meets the head.

vteck1ck

I have CEL code 21 and 6. I'm going to check the TB gasket just in case. The TB and ITM gaskets are also new.

JosephColy

when the car is running at idle, spray the brake clean all around the gasket. not all the way around in one shot, but pick small areas and take time in between sprays. if you spray a spot and the car sounds like it's going to cut off or "bog down" then you've found your problem.

vteck1ck

I done that and nothing happened, I also covered the 2 holes in the TB and it brought the idle down to 2 grand.

vteck1ck

Bump

EFPhilly

It will actually raise the idle not bog because the increase in octane...i.e. brake cleaner can catch on fire the easiest way to do it I think is to use a propane torch unlit.

As far as the idle problem goes...Im tired of seeing this ****...
https://honda-tech.com/forums/honda-prelude-4/end-all-idle-surge-bounce-etc-problems-thread-1979500/

SEARCH BEFORE YOU POST!

vteck1ck

EFPhilly thanks for the idea but if you was that tired you wouldn't have put in your 2 cents!

EFPhilly

cuz Im sending you to a link that was the end to all idle/surging on H-T. Def good place to start...if you still have the problem just say so.

vteck1ck

Still having the problem and everything I tried failed.

Jimster480

what have you tried?

grumblemarc

iTrader: (4)

Did you fix the CELs you reported?

EFPhilly

dont be afraif of the keyboard. What have you tried

vteck1ck

I checked the gaskets, vaccum lines and I blocked the bottom hole on the TB and also tried the brake clean. The CELs are cleared as well.