cheekychimp
Well-known member
Okay I previously started a thread on my idling users here.
Click
A lot of the issues are now solved so I am starting this thread to concentrate on the remaining issue which is: -
On cold starts despite having to be turned over a few times before it fires, it starts fine and idles really, really well but it hunts badly and stalls on hot starts if switched off for 15 minutes or less. I cannot for the life of me figure out why. I have heard that there is some sort of code in the ECU for hot starts. What does that incorporate and could it be causing any issues?
To recap this is an S90 throttle body which has no provision for a closed idle switch which is currently disconnected. I am using an FIAV block off plate and it has been suggested that this could be leaking. The throttle body may need to be grounded as I think the OEM grounding location was lost when we switched throttle bodies. Finally since the ISC is old it could be faulty. I purchased a new ISC but it seems the JDM and USDM ISCs are different so I am stuck with the old ISC at present.
Any of these issues could technically be the source of the problem but I really need to know why any of them would only cause an issue on a hot start and not on a cold start.
Anyone got any ideas?
Click
A lot of the issues are now solved so I am starting this thread to concentrate on the remaining issue which is: -
On cold starts despite having to be turned over a few times before it fires, it starts fine and idles really, really well but it hunts badly and stalls on hot starts if switched off for 15 minutes or less. I cannot for the life of me figure out why. I have heard that there is some sort of code in the ECU for hot starts. What does that incorporate and could it be causing any issues?
To recap this is an S90 throttle body which has no provision for a closed idle switch which is currently disconnected. I am using an FIAV block off plate and it has been suggested that this could be leaking. The throttle body may need to be grounded as I think the OEM grounding location was lost when we switched throttle bodies. Finally since the ISC is old it could be faulty. I purchased a new ISC but it seems the JDM and USDM ISCs are different so I am stuck with the old ISC at present.
Any of these issues could technically be the source of the problem but I really need to know why any of them would only cause an issue on a hot start and not on a cold start.
Anyone got any ideas?