Before changing the injectors try listening to the six existing injectors whether they r clicking away, the one that isn't clicking might be the culprit but don't light up a cigar yet..if all injectors clicking away maybe one of the pintle valve/needle might be stuck open.hi sb3,
i was having the same jerking while idling in gear D problem... and i tried switching and replacing a few ignition coil (trying 1 by 1) but still doesnt solve the problem, that's why i thought of getting a spare set injector from the chop shop and try replacing the injectors see whether that's the problem. That uncle dunno which is the injector and wanted me to point to him. That's why...
Have been busy with work tat's why just left those minor problems of the car unattended. But recently found tat the problems might be getting serious...
From what i hear so far...I think:hi dream.tent,
initially, the jerking is like wat u've described... these few days, the jerking become noticeable even when the gear is in N.
i actually planning to try cleaning the AFM using carb cleaner as found in other threads in this forum. but i also suspect there's something to do w the valve/pump thingy (sorry, dunno wat's the name), it's connecting the air filter box to the engine. i suspected tis bcos there's hissing sound at tis valve/pump thing, as if there's air leak, at tis valve. my readings tells me tat tis thing actually acts like a pump to create vacuum condition to the engine. correct me if i'm wrong. it's not confirmed yet though. i have to test it out first.
could the knock sensor faulty cause similar problems like tis?
This kind of problem , usually does not trigger an error code especially for our fatties(cefiros) , if any it would most likely read the knock sensor which i doubt is the cause. However, my best bet for your problem would b the maf as suggested by xtec, forget about cleaning the maf, do a switching test .That is, swap a working maf and see whether it fix the problem or not. Do not forget to reset ecu thereafter... let us know the outcome..update,
went to ecu scan and found no error code
:hmmmm:, what to do next? i'll start with cleaning AFM and iacv-aac and injectors...
gotta try it one-by-one with lotsa patience