Wta: 4age 20v Svt Air Flow Sensor

[weitak_83]

how to check is d air flow sensor faulty & cause jerk?

 

[chinozie]

swap your AFM with others...

 

[Adeen]

yup...try swap with ur frens...
same goes with ur ecu...if u think it's caused by ecu, try changing with another svt ecu...see whether ok or not...

my svt dulu oso burnt ecu....but it was very bad after the ecu burnt...
like car not working well...miss firing everywhere..

 

[SE.G]

hi fellow toyotarians...
have some questions here, will the afm affecting the idling too coz sometimes when i open aircond the engine will die (not all the time laa), if no aircond the engine ok, or is it because of spark plug? heee newbie dunno everything but the performance for 20 valve is unquestionable....thks

 

[otismummum]

SE.G,
Are you using SVT. I face similiar problem b4. Idle seems to be low. Bro, to tell you the truth , I ask several sifus about this problem they also can't solve it. Goodluck!

 

[anuar_fadzli]

if proton i know la bro se.g, throttle body problem

 

[chinozie]

try to adjust this thing...FICD something...
there's a alen key screw near the "cut-out" hose...adjust it...

please also make sure your TB is in good condition...

for toyota what is it called aaa ???


a bad compressor also make ur idling bad (during air-cond on)...
please do check all the air-cond fuse too...

 

[SE.G]

yes im using silvertop, erm ficd? i heard lst time there is toyota sifus doing this service but i will double check with my mech, thks for the advice i will mention to him bout this ficd..., one more thing there is someone in the forum i forgot his name already saying that he have some gadget to helps stablise the engine if we face the problem,what do you guys think, that gadget also have toyota printed on its body but forget already who that guy is liao ehehe, anyway thks guys

 

[n0th1n]

hahhahah.....
i have AFM for sale.

 

[sache]

Vacuum Sensor or Throttle Sensor maybe. But before change the item make sure check throttle body.
I have this kind of problem after installed SVT, now it's OK after done step above.

 

[weitak_83]

i hv changed d AFM few months before this.
immediately after changed, d sudden jerking problems softer; 90% solved.
however d problems come back after few weeks after changed but d condition is better than d condition before changed.

SLIGHT IMPROVEMENT ONLY...

 

[weitak_83]

try to adjust this thing...FICD something...
there's a alen key screw near the "cut-out" hose...adjust it...

please also make sure your TB is in good condition...

for toyota what is it called aaa ???


a bad compressor also make ur idling bad (during air-cond on)...
please do check all the air-cond fuse too...

how to make sure d TB is in good conditon?

 

[weitak_83]

Vacuum Sensor or Throttle Sensor maybe. But before change the item make sure check throttle body.
I have this kind of problem after installed SVT, now it's OK after done step above.

how to check d sensors are ok o not? diagnose?

 

[weitak_83]

hahhahah.....
i have AFM for sale.

good condition?

best price?

1 month cash back warranty? :)

 

[TRDae92]

The AFM actually is not that easily broke, unless the brush will broken and it scratch the carbon contact. I check mine and is all ok, but if u guys did open the top black plastic cover, better seal it back, because it will bring to air leak. AFM flap will not reading perfectly.

Another if the idle low (my svt idle is 750-770 rpm) when no on the air con, still not good enough. I also suspect the ITB or the throttle cover there is leaking air, so the vacumm from the AFM flap will not able to get full suction. Another suspect is the spark plug. Better use back heat range 6 spark plug.