Jerking at crusing speed/cold weather

[asamjeruk]

hi all,

i appreciate all advices and tips.
my waja 1.6 Auto feels jerky when at cruising speed. (70-120kmh). it feels
worse when the weather is cold, such as at night after rain.

i've changed to new ori waja spark plugs and air filter, cleaned throttle body, done ECU tuning. PDT2000 read my settings, and all my settings are good.

so, what is the problem?

will complete ATF flush solve the problem? my ATF still pinkish and was
changed how about 12000km before this.

spark plug cables? a few mechanics said they never encounter spark plug
cable problem in waja.

could it be fuel pump? but i can rev my RPM till 6000rpm. so, the pressure
is still good. could it be fuel pump relay?

i'm running out of ideas already.

thanks and appreciate all advices.

 

[asamjeruk]

Any advise? Please help. Thks!

 

[Fluffy]

have u checked the distributor?

 

[asamjeruk]

hi.

thks for the advice. i guess u mean the ignition coils, coz waja not using the traditional distributor. anyway, i get what u mean.

just swapped the coils with another waja. things improved. less frequent, and less jerky. so, it must be this coil thingie.

let me monitor a while more.

thks again.

 

[Fluffy]

oh.okay okay.good to know that ur cars alright.:_: