88turbo

i need help with this....it idles like its missing however i just changed the plugs wires and the 02 sensor, ive heard vacuum leak, coolant seepage, i dunno what it is but it only happens below 1500 rpm's. everything after 1500 is ok?
any sugesstions?
thanks in advance
jeff

J-Rat

iTrader: (2)

There is a tech article that details the finer points of TII idle. If nobody posts it before I get home, I will post the link for ya.

Jarrett

rotarynut

QUICKEST WAY TO FIND IF THERE IS A VACUUM LEAK IS TO HOSE THE ENGINE DOWN WITH WATER. IT HELPS ME ALL THE TIME.

J-Rat

iTrader: (2)

Not exactly the method I would use, but hey, whatever works.

Jarrett

cryptowave

throttle tight?

J-Rat

iTrader: (2)

http://www.teamfc3s.org/info/articles/idle.html

drago86

hows hosing water on it help? does it drop the idle or soemthing?

Fingers

don't hose it down. if the leak is big enough, you could cause hydrolock. equivalent of trying to crush a stone. Water is uncompressable.

Try misting water with a spray bottle. I have to do this myself whenever i have time.
-Ross

drago86

ok, still what are the signs i found one?

AreExSeven

Water will drop the idle. Carb cleaner and the like will raise the idle. Either way works, but be careful with the flamable stuff.

marcus219

You cant hydrolock a rotary....never heard of the water trick..steam cleaning engine internals by taking a vaccuum hose and sticking in a jug of water??

Amur_

True dat.

Quote:

never heard of the water trick..steam cleaning engine internals by taking a vaccuum hose and sticking in a jug of water??

That is The Water Trick (da-dum!) but doing that won't find a vacuum leak. :snicker:

marcus219

I meant to say, never heard of the water trick?? in question form..

:snicker back:

marcus219

And carb cleaner is a man's best friend when looking for vac. leaks..

88turbo

well thanks for all the advice...i tried carb cleaner....didnt notice any change in idle

88turbo

i thought maybe ignition so i changed plugs wires and even a 02 sens....but found no result....how would you know the coolant is leaking internally? i see no milky substance in the oil.....someone just mentioned to me about it.....but i dont think thats it becuase it only "misses" under 1500 rpm
confused<-!

Amur_

I just noticed that no one said TPS yet.


http://fc3s-pro.com/TECH/HOWTO/TPS/tps.html