IACV numpty question

[AntR]

So where is the IACv on a 1.8K with jenvey throttle bodies and emerald? Do I have one? All I can find is some kind of sensor attached to a plate underneath the throttle bodies to the left of the throttle cable.

 

Help much appreciated thanks.

[Mankee]

You won't have an IACV with Jenveys as the idle control will be done in the mapping. I think the old VHPD/KV6 bodies did have some sort of idle contrl valve though.

 

Have you got a picture of the sensor attached to a plate? This could be an inlet air temperature sensor, which is quite likely green.

[AntR]

Thanks. Thats one potential problem out of the way. The sensor is black, but given its position which is the plate where the airbox attaches to, it could be a temp sensor I guess.

 

Reason for asking is I've been having erratic idling and hot restart problems. Had a trackday today and after a session, leaving the car for 20-30mins and then restarting, the idle would gradualy drop to 500rpm and then stall. However, after a session, parking up and leaving it to idle, it was stable at 1100 rpm which is fairly normal.

[Bradders]

If you haven't fixed this already, check the lambda sensor. Sounds like the same problem I had a while back. Disconnect it and then see if it idles smoothly. If it does, that's your problem.

[oilyhands]

I doubt it is running in closed loop on the Emerald at idle so the lambda sensor will have no effect.

 

I you may have a problem with the throttle position sensor or air temp sensor, it probably just needs a small adjustment to the fuelling and / or throttle stop.

 

Oily

[AntR]

Thanks Dave. I have tweaked the idle and fueling a bit, which seems to have helped. The problem might be related to a newer tps that I fitted recently (I did the calibration, so it should be ok). If it's still a problem, I might change the tps back.