1jz vvti idling problem

[jameschia2722]

hi, is ther anyone come accross this idling problem on their 1jz vvti gte?

I have reconnect well the m-rel signal to iscv, and it perform well at 1st.
After the next day, my idling raise up to 800rpm, and when A/C on, it raise up to 1300rpm.
I have plug off the main Batt. and leave it for 10minutes. It still same after i plug on Batt again...

Anyone know what problem?

[neal]

what is the normal idle rpm at normal temp? Its normal to idle up when AC is ON but cant remember what the AC idle up rpm should be.

[jameschia2722]

As I know, normally rpm rev ard 600rpm-700rpm without A/C on. Sigh.. Anyone can help me to troubleshoot?

[pandaah]

have you tried just adjusting the base idle?... maybe do a diagnostic check with the engine light flash or clean the ISCV and make sure theres no gunk anywhere inside it cos that makes them act funny

[Officer Doofy]

I too have a very similer issue, although mine idles anywhere fromm 800 to 1100rpm and different times on trips. Have tried ecu resets which fix it for a small amount of time before returning. Have removed and cleaned the iscv, cleaned the afm and sprayed the throttle plate with no luck, so cant help with your problem but am subscribing hoping a toymods brain has an answer

[Cuts]

My 100 was playing up when cold starting (and still takes a couple of seconds to build up to cold idle)
But removing and cleaning the ISCV mostly fixed it.

Since you have done that, and cleaned TB, and reset the ecu im out of ideas. Perhaps the ISCV are getting stuck open and not functioning correctly anymore, see if you can borrow a known good one and try it.

[wilbo666]

Are you 100% sure of the remaining wiring? If I recall it's a JZX100 engine in an JZA80...

Are you sure BATT on the engine ECU is wired up?

Cheers
Wilbo