Hi, I'm after I have changed all my coils, plugs and wires, everything, I'm not sure if this is problem with vacuum or what, but after engine completely warmed up, it seems I can see this problem easily at idling, if I give a real slight input to gas pedal, RPM drops suddenly to 600~500s and recover to 800 in a short moment.....
no engine check light tho.... is it because car runs too rich or what?...
or because of throttle body?.. or fuelpump ?... again?......
argh..... help........

 

Do you have a AT? or MT? also did you replace everything with oem stuff?
I would check your plugs. On might not be on all the way. Dont follow whats on the spark plug box when installing. Replace one at a time and check the DIY for pix of where the T and L plugs are.

 

yup... it's '05 6mt... and.... yup.. have replaced and checked all Trailing and Leading plugs wires and coils...

 

Maybe your throttle cable is loose? LMAO, j/k good luck i would get that fixed its def not normal.

 

Just a guess but if your car was running rich to compensate for your bad plugs it may take a little bit for it to relearn trim to come back down.

 

give it a few cycles.
i'm guessing you unplugged the battery?

 

You can reset the ecu. Unlugg your battery pump the gas peddle till you see the oil gauge go up to the center then back down. See if that works if not i'm going to say it could be your gas filter??? IDK...

 

Zum i'm hoping u know that it's fly-by-wire on the throttle! haha I'm guess that was a tad of sarcasm!