Then anwser me this.
What is this clicking noise, here are the FACTS.

Noise info...

-Noise happens abour 3-4 times a second.
-Noise is only at a certain throttle position.
-Noise sounds like a tapping of fingernails on a table, lightly, and quickly.

When it will and will not make the noise...

-Will make the noise while driving, from about 20%-60% throttle.
-Will make the noise while driving, if putting the car in neutral, and revving.
-Will NOT make the noise while revving in neutral at a complete stop.

Other info...

-Distributer makes a grinding noise at ilde, goes away after engine fully warms.
-Engine rebuilt about 4000 miles ago, noise started happening about 1000 miles after rebuild
-All driveshafts, and CV joints look fine.
- I always use 93+ octane gas, and Mobil 1 full syn. oil.

Heres what was done in the rebuild
-ITR pistons
-full head job, port/polish, valve springs, retainers, valves, seats, ect
-new dist.
-Skunk2 manifold
-AEM fuel rail
-280cc injectors
-ITR FPR
-ACT clutch
-I/H/E
-all new belts, pulleys, seals.
-I have recently added 6403 cams, did not change the noise, valves could use to be adjusted, but they are not that bad, the noise is definatly not comming from the valve clearances.

ALL help is greatly encouraged, I would even pay you if you took a ride in the car and could tell me what the noise is

 

Just a wild guess...injector going bad under fuel load?

 

this is a shot in the dark
valves?

 

if it was the valves wouldnt it make the noise while revving in neutral?

 

Perhaps a screw is not bolted strong enough? When the engine has a certan frequenzy the screw is giving this noise.

Sometimes the things are pretty simple.

 

Maybe a loss motion device under one of the rocker arms is sticking down ? maybe on the exhaust cam since that is the cam that operates the distributor.
does it go away when the VTECH is engaged? good luck.

 

Maybe a loss motion device under one of the rocker arms is sticking down . that might be it when they did all the head work that might have happen it when you below 55psi oil pressure. this happened to my friend and iam am a master tech ase *****.

 

Another guess...Since the distributor is making noise when cold, maybe you should look there first. If the distributor has a bearing going bad and it freezes up while you are driving the car, it can tear the hell out of your valve train.

 

did you check the wheel bearings since it only makes the noise when you are moving?

I agree with starting at the distributor, I had one do the same thing... it ended up seazing up on me. Not fun when the car shuts off at 60mph!!

 

Does he know the answer and want's to see if you can figure it out?

I know he doesn't, but it kindof sounds that way...

My first thought was valves. But that doesn't seem to be the case unless they are too tight. Also, he mentioned that it goes away after idle. After it is warm. Have you checked your head for loose parts flaping around in there, then get sumereged in oil are engine heats up? This is highly unlikey, but worth a shot.

 

maybe it's you lug nuts or wheel covers

 

Well I would have guess fuel pump but that wasn't listed as a mod. I would just think that an inline fuel pump would be quite loud and make something close to that noise when it's working.

 

It only makes the noise after driving the car for a good 15 minautes, after getting warmed up, and will not make it revving up in neutral at a stop, but it will make the noise while moving in neutral while revving up. It seems to be very sensitive to throttle position my best guess being between 20% and 60% throttle. It will not make the noise at WOT.





[Modified by 97blackteg, 5:15 PM 12/22/2001]

 

HEY, wait a minute. Is the clutch pedal in or out when car is making this noise? Maybe it is the throw out bearing? It's hard to figure out without being there. It must be a loud noise to hear it above everything else.

 

need valve adjustment

 

impossible, it is a consistant noise, wont get louder or faster, stays the same at all RPM, and will not make the noise in neutral at a stop.

 

pcv valve line is clogged?

 

the more i listen to it the more I think its the distributer.

 

Possibley tip in detonation... have you thought of this yet?

It'll do it only at certain RPMs, it'll only do it under a load, it can be temp variable, and it sounds EXACTLY like what you described. Maybe like small pebbles in the bottom of a can being rolled around sometimes?

It can be cause by any number of things. If your dist. is going bad, then it won't send enough spark, and that'll cause it. I say, try retarding your timing, run some race gas or 93 octane with octane booster (the good kind now), and see what happens.

 

In your first post you said "new dist." I assume that means new distributOr. Do you still have the old one to try? Broken Lude could be right about the detonation. If the distributor bearing is bad, it can move the spark around as the rotor does not spin in a perfect circle. Was your new dist. really new? Pull it and check the bearing for wobble and smooth spinning.

 

I was going to vote for the PCV valve as well.

Not so much a clogged system, rather excessive crank case pressure. Blow by will be relatively non existent in neutral but much greater under load.

Scott

 

WOW !? Not that this is the place for it but if your a master mech. ? Who read the questions to you for the test? because you certainly don't iterate well... i guess hooked on phonics doesn't work....

 

<U></U> LMAO he said wheel covers !! i heard him

 

Well from what you described it sounds like the the problem i had. and being the transmission bellhousing is below your distributor i can see how it may seem like the problem however. if it were the dist. it would make the noise at a constant rate all the time but, since it only goes away when you push the clutch in i would focus on the throw out bearing or the inner bearing... with all of those goodies on it you may just be having to much fun to have realized the car taking such a beating

good luck

 

ya, maybe, Ill try to retard the timing, maybe it will help, I always run 93+, ill go get some octane booster, well see real fast if that is the problem, also I found what EXACTLY sounds like the noise

Ok most of you all play GT3, when you go to the tune the transmission on it, and adjust the final drive, that sounds EXACTLY like my clicking noise, not as fast, but if you click it slow thats the noise. Hope this helps.