Idle Problem (up & Down) - R32 Gtst Rb20det

[Hawker180]

Hey,

Im having problems with my car at idle, It idles up and down:

eg. 1000rpm,(2 second grap) 1300rpm, (2 second gap) 1000rpm, (2 second gap) 1200rpm etc.. Some times it stops & idles fine (for a good 15 seconds then up and down again)

Its set to 1000rpm on the PFC.

Mods: HKS turbo, Z32 Air flow metre, 460cc RX7 injectors, Power FC.

Any help would be great,

Luke

[maxwolfie]

Same prob here

Micotech LTX8

[predator]

sounds like it needs a better idle tune to me.. why not see a workshop to get them to retune it?

[Hawker180]

sounds like it needs a better idle tune to me.. why not see a workshop to get them to retune it?

<{POST_SNAPBACK}>

The Tuner is 4 hours drive away...

I'll ring them up and see what the go is

[jvs007]

dude, unrelated question.... do u have a rwkw figure ??

i got a 2530 on my r32 and interested in other cars with similar mods.

[rob82]

Same prob here

Micotech LTX8

<{POST_SNAPBACK}>

Ahh, try buying a computer with a idle contol function.

[paulr33]

what does your airflow meter value look like if you goto etc, switch sensor/check? what your rpm idle set to and rpm idle for load

does it change with aircon on or off?

[krzysiu]

Normally the idle goes up at down is when you got something like your A/C / Heating on, even your lights or you slightly move the steering wheel.

[r33_racer]

Is your turbo high mounted?? Problem with mine is the afm is too close to the turbo and the blades chop up the air around the sensor if its too close on deceleration and the idles starts playing up...you need a minimum of at least 1 90 bend roughly between turbo inlet and afm..put some distance between the two. If you dont have a high mount then im not sure what the problem could be..maybe ur idle control valve needs cleaning or maybe theres a electrical fault...wires or plug??? Might be worth looking at.

[Taran]

What air filters are you guys using?

[Hawker180]

Is your turbo high mounted??  Problem with mine is the afm is too close to the turbo and the blades chop up the air around the sensor if its too close on deceleration and the idles starts playing up...you need a minimum of at least 1 90 bend roughly between turbo inlet and afm..put some distance between the two.  If you dont have a high mount then im not sure what the problem could be..maybe ur idle control valve needs cleaning or maybe theres a electrical fault...wires or plug???  Might be worth looking at.

<{POST_SNAPBACK}>

My turbo is low mount (factory location), & is the same distance to stock. but there are no bends in it, it sits farly straight though, only a slight bend it!

I have another idle controll sensor, i think ill try that.

- Thanks

Luke

[Hawker180]

What air filters are you guys using?

<{POST_SNAPBACK}>

HKS Pod (4 inch inlet)

[Taran]

Dry type filter right?

[GIGOLO]

Not sure about an RB20, but in my RB25 I had a similar problem and after cleaning the AAC velve behind the intake plenum the problem went away.