Bad Idle/hesitation/dimming Lights!

[rambocarebear]

Hey all,

Hoping anyone can shed some light and wisdom on my current issue.

Background history is that i did clean

I've got an R33 RB25DE n/a AUTO (dont laugh, im on my P's) which is idling really badly.

It happens when the engine is warm.

The car idles between 200-1500RPM.

I also noticed that when I am at a set of traffic lights and the car is struggling I have to put it into neutral to prevent it from cutting out the RPM then bounces bewteen 200-1500RPM.

Whenever I brake to a halt the car will occasionally cut out while im driving.

Also, when I am driving at cruising speed (60-100km/h) and I release the throttle the RPM will drop really low (1000-1200RPM) causing the car to slow down as it is acting as an engine brake.

Finally, I noticed that when the idle is bouncing up and down the headlights a dimming !!!! so that really mixes things up..

anyway, I've uploaded a few videos to help better explain my description.

In neutral

In drive with brake applied

Rolling in drive without throttle applied

Thanks in advance lads!

[Moodles2]

Might be the airflow meter, if cleaning doesn't help try a known working one and see if it still happens.

Other thing I can think of is the oxygen sensor, it will be (or should be) cycling at low loads.. perhaps it's doing something wierd, try unplugging it.

[rambocarebear]

Thanks for the advice!

I checked the error code and go code:55 which means that the computer hasn't reported any issues lol

I will check the AFM and report back.

[Moodles2]

Look into cleaning the AAC as well

[rambocarebear]

Fixed.

Had a look at the AFM connections and the soldered joints that connect to the plug broke away (probably due to vibration and age of vehicle)

I carefully resoldered them back and now the car has run back to normal for the last 300km.