N2oExpresS2k

The ecu cannot make the sound of a valve train that's out of adjustment go away. Nothing the ecu can do with regard to ignition timing or injector timing will silence valve tick. A valve train out of adjustment is always going to make noise. It doesn't go away. It's highly unlikely that a piston is making that tapping noise either. He would have all sorts of other issues if that were the case.

jyeung528

yeah, it could be, but you post no information to back that up...
it could be a midget tapping out SOS from inside the fender too.

try to post some info to back up you're ideas to help the OP out.

jyeung528

ticking noise coming from ... the front top of my engine.

Its seems to only show up ... in the lower rpm range.

It is not completely constant though and I dont notice it in higher rpms.


there...

it could be loose valves.

N2oExpresS2k

lol

jyeung528

but more likely it is the TCT

3ngin33r1

TCT

krnmike

i never said ignition timing or injector timing will silence anything. The ecu can do many more things beyond just that. the OP said the sound goes away later on. the ecu can do alot more than you think.

if you say the ecu can't do anything about it. then how does the noise go away?

anyways, we've already had people with 4th piston problem.
my friend actually had a 4th piston problem too which he though was the TCT.
there are videos on youtube with piston problems that sound just like TCT.
there's also a thread on TCT, and some people ended up having 4th piston problems.

N2oExpresS2k

The ecu CAN'T silence valve tick. Sure it can do a lot, that's just something it can not do. Why would the sound come and go? Maybe because the oil pressure in his motor isn't consistent and his valve train starts ticking or his timing chain starts slapping when his oil pressure goes down.

As for the 4th cylinder issues. That only comes up from people who abuse their cars, much fewer percentage of the population than those that have the TCT problem, and like I said, if that were the case, he would be dealing with a lot more issues than just tick. I.e. unusually high oil consumption, loss of power, etc.

3ngin33r1

Yes, it can.

Here's how...

Pull the kick plate.
Disconnect the ECU plugs
Remove the ECU retaining bolts
Remove the ECU
Replace the kick plate

No more valve tick.

vtec9

TCT will repeat much more rapidly than a valve or piston. It sounds similar to a baseball card in the spokes of a bike wheel. They sound different enough that the two should never be mistaken. It could also be an injector(s) though, which often is mistaken for a noisy valve.