I just open up the bonnet and I saw the throttle body sensor with the wires coming out of it.But I can;t see the air bleed screw.

My wira 1.5 injection TPS voltage is 2.50V. How to adjust that to 0.5 - 0.95V?

Thanks for the great info.

I'm not familiar with cars, please help me

1. I'm driving  a 97 1.5L carburator wira, can i use this technique too?

2. Is there an ECU for this engine?

is this apply to all proton cars? i dun know how u mention the situation but i do feel my car vibrates when idling...

im driving persona btw

Yup when i was driving my wira mmc that time i always play with the idling screw...as low as possible,save fuel ma. Now driving campro car idling set at 1k rpm so suck.

mine got some problem with the air-con, and the lighting of the car... can it be solve by resetting the ecu?

coz whenever i rev my car to 1.1k rpm(around there) during the idling or when there is traffic jam, then the air-con will not have any problem and the car lighting will not goes dim.once i release the pedal then air from the air-con ll lost its coldness and i can see the light become dimmer(during the night, when all electrical stuffs is on).but when the air-con is off, the light only become slightly dimmer.

can anyone help me, if it was not the fault of ecu.

thx

no, it does not apply on all proton car
cars like Satria GTi, Putra and Perdana V6 run on stepper motor which draws air automatically..
wira series is running on gear type where u can do adjustment
as low as posibble hurt ur engine.. no wonder last time u complaint ur wira so much problem

to TS:
would'nt a FICD do a nicer job? my friend wira 1.6 also got problem with idling.. my mech juz install FICD from toyota and now his idling is superb!

ok so mine is around 900 rpm, n my car vibrate.. so how much rpm u think will make the vibrate stop

my nissan car also the same. on air cond idling sure up. turn wheel when not moving also up.

How do i set the BTDC to 12°? And how do I know if it's already 12 in the 1st place?

I have read a lot of topic on this issues but there were virtually no information on how to cure this problem; ERRATIC IDLING on Proton fuel injection cars.

I own a Wira 1.6XLI Auto and Waja 1.6 Auto.

The Wira have been giving me problems since 2004 when the original Throttle Body fails.
So I have the servo kit changed (2 times in fact); but no good at all.
Proton sell the Throttle Body unit for RM 1200+, so I get a re-cond unit at RM580; but still no good.
Same result as changing the servo kit.

I am an ex-mechanic myself, so I went on a learning spree about fuel injection cars.

Tried reset ECU by taking off battery for 30 minutes, went to workshop for diagnostic reset error code and troubleshoot; every thing is fine; but idling still erratic, especially when air-con kicks in or turning the steering while parking or making a turn.

I've eventually solved the problem... literally!

Here is what you need;

1) flat or Phillips screw driver
2) or no. 8 spanner
3) digital volt meter (must be digital)

Firstly, check the followings;

1) timing set to 12° BTDC (variable range is 8° - 18°) you can set to proper value after adjustment depending on the fuel U use
2) make sure TB Servo is working properly (hot start engine should rev above 1000RPM then drop below that after a couple of seconds)

MUST;
a) set to proper timing of 12° BTDC if not done
b) if TB Servo not working, have it changed

Without meeting a) & b) requirements, this adjustment procedure won't work.

After that, here is the easy part;

1) Start your engine or turn car key to ON position
    - measure TPS (Throttle Position Sensor) the 2 green terminals
    - variable range must be between 0.5 - 0.95 volts, U try which value is suitable for your car, mind is 0.5 - 0.6 (nice & stable)
2) Turn OFF engine, make sure car key is in OFF position
    - turn the air bleed screw all the way clockwise until it locks, not tight - just lock
3) Start the engine & let it run for a minute or so
    - engine should open the idle servo to compensate for the lack of air
    - engine should automatically rev to >1000RPM then steadily drop to 600/700RPM
4) Engine still running after 1 minute (take your time, let the engine figure out what to do)
    - turn air bleed screw 1 full turn anti-clockwise
    - engine should again rev >1000RPM then drop to 700RPM or so
5) Let it run a minute or so again
    - now ON air-con
    - engine should react immediately to the extra load
    - ON & OFF air-con a couple of times between intervals of 30 second or so
6) You may turn the air bleed anti-clockwise more, if air-con idle too low
    - range is usually 1 - 2.5 turns anti-clockwise

* You are done

My Wira now accelerates better, more immediate and less smoke due to rich idle, engine runs cooler too.
Previously it chokes & accelerate like a diesel vehicle, vibrates during idle; now no more that.

You guys enjoy. Proton car is such a fuzz.

Bro

my waja idling went crazy after engine overhaul. cannot get the idling. tried to swap with new TB,solve the jumping idling rpm, but now the rpm wont get down below 1000. stop at 1500 and lower when i turn on air-con.any idea?

check for any vacuum leaks at ur throttle body and intake manifold... check for vacuum line leaks as well...
check cam timing if its correct during timing belt installation...

ok so mine is around 900 rpm, n my car vibrate.. so how much rpm u think will make the vibrate stop

check for any vacuum leaks at ur throttle body and intake manifold... check for vacuum line leaks as well...
check cam timing if its correct during timing belt installation...

its normal to have 900rpm. if on aircond should drop to 800rpm. if ur car is new enough,normally will not feel or see the vibration. when ur car is getting older even like 2years time when u idle u can see the steering vibrating. normally this vibration is on idling only. if u are in gear it wont vibrate.

hi TS,

Is there a sure way to RESET Campro IAFM engined ECU????

Another question would be, 2 weeks ago, i had my ecu retuned by Proton SC using PDT to retard my ignition timing from step 1 to step 2 to reduce my engine pinging noise.

Will this setting be erased / reset once the ecu is reset?????

My wira 1.5 injection TPS voltage is 2.50V. How to adjust that to 0.5 - 0.95V?

Bro

my waja idling went crazy after engine overhaul. cannot get the idling. tried to swap with new TB,solve the jumping idling rpm, but now the rpm wont get down below 1000. stop at 1500 and lower when i turn on air-con.any idea?