ano - watashi - cho to ma tei - 20v MAP problem

Acoustic · Jun 7, 2005

ano

watashi

eeeeeeeeeeiiiiiiiiiiiiiii

cho to ma tei

mitekurasai

http://www.my-acoustic.com/Car/ECU/20vMAP_problem/20vMAP_problem.htm

TRD16v · Jun 7, 2005

Chin!! wahhhh suddenly u speaks jepun dem good la.. din know ur language good.. wahhhh can go japan liao no need go to china.. ahahahahahaahahahaha! :D

Regards,
Mike

Acoustic · Jun 7, 2005

for fun only lah, I don't know wan :)

4agze · Jun 7, 2005

woi, looks like serious shit problems in blacktop wei!!

need to check liao, wong sifoo i will make appointment with you soon

chinozie · Jun 7, 2005

so chin,
if i made myself a VVT light indocator...taking directly from ECU...u won't reconmended right...so the best is to take directly front the VVT from the engine bay...which is VVT on, light off right...?

4agze · Jun 7, 2005

from engine, VVT on = lights on
from ecu, VVT on = lights off

levin818 · Jun 7, 2005

Hi guys... expecially those BLT who like to bully SVT :D
Watch out one day you might experience sluggish on your belove BLT engin, and will be out-run by even a SVT A/T... hehehe...

Here are some brief of the problem...

Each time when the VVT solenoid is triggerred, the Transistor has to suferred for a surge current (which appears in milli-sec only). This surge current will create heat on the Transistor body and need to be dissipate properly. For SVT engine, VVT only trigger when RPM is beyond 4400rpm. Since we are not often running the engine up and down around this RPM level, the Transistor is able to dissipate the heat before the next trigger is coming.

But for BLT engine, the VVT is design to be trigger by TPS angle and RPM, which is more frequent than SVT. The average heat created on the BLT Transistor is much higher than SVT, and is beyond the specification of the Transistor. So it will die, after you pushing your engine too hard.

Here is some photos for your viewing pleasure...

levin818 · Jun 7, 2005

Closer look...

levin818 · Jun 7, 2005

Zoom....

levin818 · Jun 7, 2005

However, your engine will still running and you will not experience any engine stall problem. It is only that your VVT will not longer triggering liao...

The only solution is, change to adjustable cam pulley and discard the VVT...:D

n0th1n · Jun 7, 2005

again, im with chinoze.
i got a vvt light that can turn on when my vvt is on. i suppose. but i tap it from the ecu. is this not adviceable?

thanks for explaining...

Acoustic · Jun 7, 2005

levin818 said:
For SVT engine, VVT only trigger when RPM is beyond 4400rpm. Since we are not often running the engine up and down around this RPM level, the Transistor is able to dissipate the heat before the next trigger is coming.

eh wong sifu ar, but sifu master pendekar ZUL's SVT trigger by TPS vs. RPM wor. year 94.
I think all after 93.5 is like that while I also suspect since day 1 all 20v like that.

levin818 · Jun 8, 2005

yeah Chin i remember u told me that b4 but still yet to varify with '92 and '93 ECU. Perhaps Datuk EFN can help us to confirm it since he has a lamp on his dash for VVT indication.

levin818 · Jun 8, 2005

For those who wish to connect an external lamp for monitoring the VVT, u may refer to the following attachment.

The diagram on the right will add extra 12mA to the Transistor but the diagram on the left will not (recomended). Bulb is not recomended as the current consumption is high and will further shorthen the Transistor's life span.

Note: the diagram on the left will not work if the VVT solenoid is disconnected.

levin818 · Jun 8, 2005

So how to avoid the VVT Transistor from burnt?
The solution is: add a heatsink on its body which will helps to dissipate heat faster.

Try to look for following heatsink from Jalan Pasar. Or please specify heatsink for TO-126 Transistor.

When assemble the heatsink to the Transistor, makesure that the heatsink isn't touching the surrounding components, and the ECU casing!

EG9 · Jun 8, 2005

Wong,

Can you change the VVT controller transistor?

4agze · Jun 8, 2005

i see that Datuk EFN's vvt on (his lights off) when he rev kau kau, no, even on half...

4agze · Jun 8, 2005

wong sifoo, what is that heatsink? have you installed it?

TRDae92 · Jun 8, 2005

EG9 said:
Wong,

Can you change the VVT controller transistor?

Ya, can be replacement the transistor???

levin818 · Jun 8, 2005

Yes it can be replace.

And a heatsink is recomended after replacement.

ano - watashi - cho to ma tei - 20v MAP problem

1,000 RPM

1,500 RPM

1,000 RPM

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Very Young Member... :D

2,000 RPM

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1,000 RPM

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