- Jan 24, 2019
- Reaction score
- Members Ride
- VR commodore ute
This might not help but if you have one floating around try it. Look at changing the vehicle speed sensor. They do have problems time to time. Speedo works fine and everything but the output from the sensor to the ecu not only gives the speedo a signal but the trans control side of the pcm looks at the vss so it knows how fast you are moving so it knows which gear it can shift in. If the signal becomes erratic the trans says I don't know what speed I'm doing so I'll just go into default and only give you 3 gears and won't kick down. I think the reference voltage wire is paired with tps I think don't hold me to it tho. It may not be the problem but I chased that trans problem and throw no codes but some how I changed the vss and no problem after that but my problem was a hot day and very rear but if you want to look into it just search the web and see if it helps. Hope you sort it. Car is looking good btw.The other faulty TPS normally resulted in limp mode. One Delphi TPS that played up within a few weeks, worked mostly but give it a bootful and it would throw a light and not shift up. Then shut it down and it was ok until the next test at WOT. It was also not kicking down up hills. TBH I have hashed over this many times and I might even have a thread about it. I'm just going to wait until the harness is repaired and the new TPS is on and go from there.
I've been stung a few times now with all types of Delphi sensors and I am trying to avoid them, as Delphi is no longer any good.