Your comments about the IAC and them sending you a new motor got me to wondering because I have been dealing with IAC issues with my FI TECH unit since I put the VAN back on the road this spring. I'd finally discovered that the TPS sensor was inactive because the idle screw had not been set at the factory. That also explained why the accelerator pedal was so heavy and hard to depress. Once I got the throttle plates off being totally closed, the IAC finally started to respond. However that led to other issues, mainly that I would put in changes and send them to the ECU and it would accept them but nothing seemed to happen. Turns out that under the PRO Tuning Program there is a subroutine called "Learning". If I enter that, there are toggles for the TPS and IAC and Fuel that can be switched on to cause those sub-programs to "Learn". Essentially changing the default setting in each from "0" to "1" actuates the learning process. The change is sent to the ECU and it records the change and accepts it. What is happening now is that my IAC is dropping down to idle a lot faster than it used to and I can shut the unit off without diesel or run on. The only thing about them that I have noted is that the learning process only continues while the engine is running, If I park the unit and shut it down, all the learning switches automatically revert back to "0" or off. The only solution so far is to revisit those switches during warm up and pop them back to the learn position.
The other positive note to relate is that my 700R4 is a 4spd but fourth has not been getting any shift time due to most of my driving being traffic light stop and go. Managed to get some running room this AM/PM and T-mission slid into 4th slick as you please. RPM's drop, like having to slow down for snails, and you feel the downshift and the tach needle pops up ever so slightly. Tells me that I did manage to get the TV cable tensioned just right. That was one of last year's ongoing sagas.
Point here is that IAC TPS have to be able to tell the ECU what they are doing. That means that somewhere in the tuning set ups there ought to be some type of dedicated subroutine that takes the input from the Throttle Position sensor and the Idle Acc Control and sends them back to the ECU. it will likely possess some kind of default settings that will allow the car to start but after that you have to adjust or modify them by changing the on screen values or using a lap top to scan the maps and modify them by changing their values in order to get the motor to respond as ti should.
A local supplier offers refurbished lap tops for under 3 bills and one is on the agenda for me. Using the hand held and plugging in values at random is all well and good but i want to see the maps and discover for myself what my changes have done collectively; not just have to deal with them piecemeal.
Nick
The other positive note to relate is that my 700R4 is a 4spd but fourth has not been getting any shift time due to most of my driving being traffic light stop and go. Managed to get some running room this AM/PM and T-mission slid into 4th slick as you please. RPM's drop, like having to slow down for snails, and you feel the downshift and the tach needle pops up ever so slightly. Tells me that I did manage to get the TV cable tensioned just right. That was one of last year's ongoing sagas.
Point here is that IAC TPS have to be able to tell the ECU what they are doing. That means that somewhere in the tuning set ups there ought to be some type of dedicated subroutine that takes the input from the Throttle Position sensor and the Idle Acc Control and sends them back to the ECU. it will likely possess some kind of default settings that will allow the car to start but after that you have to adjust or modify them by changing the on screen values or using a lap top to scan the maps and modify them by changing their values in order to get the motor to respond as ti should.
A local supplier offers refurbished lap tops for under 3 bills and one is on the agenda for me. Using the hand held and plugging in values at random is all well and good but i want to see the maps and discover for myself what my changes have done collectively; not just have to deal with them piecemeal.
Nick
