Thanks

 

Well, I'm almost there but I cannot seem to get the OBDlink to communicate with the GEMS app. I got it to communicate with the device app but not the app I need to reset the adaptive values. I get a message that says "Cannot connect to GEMS app."

Any help is appreciated.

Thanks

Brian

 

Finally- got the OBDlink to communicate with the vehicle ECU using the GEMS app. Just took a few attempts.

I tried it out on my working D1. My questions are
1). what do the values mean below and

2). if I toggle to reset adaptives what do they reset to?

Prom ID 9637
TPS close throttle 0.605

​​​Fuel flow rate 0.04
Air flow Rate -1.9
Short term idle 0
Long term idle 35

Immobilizer synch. ?????
Adaptive values Reset (reset to what values)

Thanks for the help.

Brian

 

If you have either of those enabled when you click connect it will perform those functions

immobilizer synch is used to pair it to an alarm on a disco or the bcu on a p38

reset adaptive values does what it says


prom id is what version of the chip its running. The dealer would swap these out with tsbs and service campaigns. Usually theres a green sticker on the ecu or near the grill, but you can just use the scan tool to know for sure

more info on proms is in the last few pages here. 9637 is the most up to date for your truck

http://p38arover.com/rover/p38a/Engi...MS_Systems.pdf

 

I was able to communicate to the vehicle's ECU and reset the adaptives. The engine turned over and was idling around 1000 rpms for 60 seconds and then started to fluctuate. I shut it down and reset the adaptives again. Started her up and before the idle went too low I put the truck in reverse and the idle immediately went to about 650rpms and finally sounded normal and stable. I backed out of my driveway and drove around the block- engine sputtering at first but eventually it settled down enough to give me confidence to take her for a real drive. At first the vehicle wasn't able to hold a steady idle between 20-40mph- then it settled down. Once I got to 50mph the truck sputtered again until I backed off. After a few minutes at 50mph I could get her to 60-65mph with no effort. It felt great- and the best part was that it didn't stall at stop lights once I got back into city traffic- the idle was steady at 650rpms.

My only hiccup is when I shut the truck down and try and start it back up. It revs high and then the rpms go low. If I put the vehicle in reverse or drive prior to the rpms going low it settles at 650 rpms. If I keep the vehicle in park it sometimes wants to stall out unless I open up the throttle.

I'm not sure if this start idle issue will go away with drive time now that the adaptives are reset or if I need to try and reset the base idle as mentioned in the workshop manual or something else.

This is the first real progress I've made with the idle issue in two weeks thanks to Robertf and his advice.

Thanks

Brian