VVT problem on 20 V Blacktop

[Veloc]

Dear sifus and forumers,

This problem has been a bug to me for some time now. All the symptoms point to a malfunction in the VVT system, but the problem is I don't know where. PULLEY or SOLENOID???

The symptoms are really poor low end torque, poor FC, unstable idling (sometimes will die off).

It is not the ECU as I have checked it. It does send out the signal to activate VVT. I am more inclined to believe it's the solenoid, but the mech said it is most probably the pulley. The problem is there is not ticking sound in my engine. If it is pulley, it usually has the famous "tick of death". I do not want to jump straight and remove my pulley because it's not a cheap labour. But the thing is, does the VVT solenoid ever get spoiled? Any such cases? I only heard of pulley problem so far.

I know, I will get it checked some time soon. I just want to hear experienced opinion here and rant. This caused me sleepless nights.

 

[bera]

the solenoid also can get spoiled...i change mine when it leaked oil...as the vvt is activated by oil pressure...any leak will cause the oil press to fluctuate or worst no pressure at all...easier to tell if you got an oil press meter...

usually the solenoid o ring have harden and start to crack then leak oil...so try change o ring first...it only cost couple of bucks and 15 min to do it DIY...i did that once...but mine leak at the socket...so no choice have to change to another one...

based on your describe symptom...i dont think its the pulley or the solenoid...because even with busted pulley and selenoid it wont cause the engine to die off...no power maybe yes...but to die off...i doubt vvt system is the cause...

also it doesnt hurt to check for error code...maybe there is something else...

good luck...

 

[D7zul]

usually, that kind of symptoms is ECU fault..

check error codes..

VVT doesn't function until it reaches 3k rpm

 

[me2kimi]

Bro Veloc, you can do a solenoid functional test.
1- take off solenoid wire from the solenoid
2- start your engine
3- pull 2 wire from battery straight to the solenoid
4- if the solenoid ok, it will advance the pulley and you will notice the engine behavior change. It will sound like 'timing lari'.

Be careful while you handle the wiring.

 

[Veloc]

the solenoid also can get spoiled...i change mine when it leaked oil...as the vvt is activated by oil pressure...any leak will cause the oil press to fluctuate or worst no pressure at all...easier to tell if you got an oil press meter...

usually the solenoid o ring have harden and start to crack then leak oil...so try change o ring first...it only cost couple of bucks and 15 min to do it DIY...i did that once...but mine leak at the socket...so no choice have to change to another one...

based on your describe symptom...i dont think its the pulley or the solenoid...because even with busted pulley and selenoid it wont cause the engine to die off...no power maybe yes...but to die off...i doubt vvt system is the cause...

also it doesnt hurt to check for error code...maybe there is something else...

good luck...

usually, that kind of symptoms is ECU fault..

check error codes..

VVT doesn't function until it reaches 3k rpm

Bro Veloc, you can do a solenoid functional test.
1- take off solenoid wire from the solenoid
2- start your engine
3- pull 2 wire from battery straight to the solenoid
4- if the solenoid ok, it will advance the pulley and you will notice the engine behavior change. It will sound like 'timing lari'.

Be careful while you handle the wiring.

Thanks guys... But like i said, i checked ecu already. It does send the activation signal. So i suspect its pulley or solenoid. But my pulley no ticking sound and my solenoid no oil leak... that's why im confused. I will test both. Solenoid first as it is less costly. Just wanted to ask u guys here... is it possible that the pulley fail without giving out ticking sound, and is it possible the solenoid fail wihout leaking oil....

Sent from my android using Tapatalk.

 

[D7zul]

oh.. clean ur ISCV too..

 

[levin818]

... poor low end torque, poor FC, unstable idling (sometimes will die off)...

ISCV clogg
4-throttle clogg
ECU
O2 sensor fail

 

[Veloc]

oh.. clean ur ISCV too..

ISCV clogg
4-throttle clogg
ECU
O2 sensor fail

Guys... what is ISCV?

Btw, my tb was clogged previously. Just serviced and rebalanced all.

ECU and sensors all fine previously checked. But my mech check only. Okay thanka for pointing out. I will bring it to a dedicated auto electrical technician to check more thoroughly.



Sent from my android using Tapatalk.

---------- Post added at 09:23 PM ---------- 6 hour anti-bump limit - Previous post was at 08:09 PM ----------

Okay thanks i just googled ISCV.

Sent from my android using Tapatalk.

 

[KenDiriwan]

 

[D7zul]

Hehe.. U won't see d ISCV from this angle unless u already opened it

U can only see d 2 pipes n a 3 pin connector (if I'm not mistaken)

 

[feralee]

the solenoid also can get spoiled...i change mine when it leaked oil...as the vvt is activated by oil pressure...any leak will cause the oil press to fluctuate or worst no pressure at all...easier to tell if you got an oil press meter...

usually the solenoid o ring have harden and start to crack then leak oil...so try change o ring first...it only cost couple of bucks and 15 min to do it DIY...i did that once...but mine leak at the socket...so no choice have to change to another one...

based on your describe symptom...i dont think its the pulley or the solenoid...because even with busted pulley and selenoid it wont cause the engine to die off...no power maybe yes...but to die off...i doubt vvt system is the cause...

also it doesnt hurt to check for error code...maybe there is something else...

good luck...

U buy VVT solenoid new or from chop shop

How much?

 

[D7zul]

U buy VVT solenoid new or from chop shop

How much?

i juz bought a new vvt solenoid rm220

---------- Post added at 09:29 PM ---------- 6 hour anti-bump limit - Previous post was at 09:01 PM ----------

veloc, ur pulley no sound meaning its in good shape.. juz like my (not so) new pulley

 

[bera]

U buy VVT solenoid new or from chop shop

How much?

i bought used (chop shop)...if i remember correctly its around rm 120...long time ago...forget already...if can afford buy new...price like d7zul bought...

 

[Veloc]

Now the sound getting louder and obvious. Like diesel sound. I got a used pulley today. Going to try to install over the next few days. Hope that solve it. by the way, my idling mysteriously got better. Smooth and no more problem. It's just the ticking noise now and the emptiness of power from 2000 - about 6500 rpm that bugs me. Seriously lack of torque its very severe.

As for my solenoid, i got it checked already no problem. So i guess its the pulley... Hope it will be solved.

 

[KenDiriwan]

Don't worry diesel-like sound would just be a noise issue, will not affect in-term of performance and wear/tear wise.

Recently i bought two solenoid opened from halfcut for RM150 both. Imo u just have to know the correct halfcut runner that doesn't poke a hole on your wallet and honest enough for not a spoilt item.