Ranger Mods

Hi All,
Px1 XLT 3.2 Auto, 2013

Revs surge under slight load when cold (60kph/4th gear).
I want to use Forscan to identify if this is a fueling issue or a boost issue or a transmission (likely torque converter or pressure to it) issue. All sensors cleaned and appear functioning on generic OBDii reader.

I assume the fuel pressure commanded vs present tools will identify if the pump or fuel pressure valve is off.
Boost? How to I know if fluctuating boost is being commanded or is a result of a very minor (no code throwing) leak?
Transmission? How do I identify if the TC is coming out of lockup “unauthorised” vs being commanded to? Or if it is coming out of lock up, why? (Low pressure? And if so how is this identified?).

If the transmission has a “stronger” replacement TC, does this affect its operation and does the TCM need to be told to accept different pressures or something?

Lastly, how does the position of the butterfly valve in the intake get read, and how can I test its functioning (real position vs commanded position)?

Newbie here, just got the SAEB OBDii cable (looks nice if you’re wondering) and Forscan, extended, on the laptop.

Cheers,
Dave

This turned out to be so mysterious that the recon transmission was investigated but the fault never identified by the specialist. They supplied a completely different recon unit and the issue is now resolved. I wish I new what it was! Multiple torque converters and valve bodies didn’t fix it…

Thanks Stewart. Share my disappointment that more could not be of assistance, rather than just take-and-go. At a minimum let others know problem resolution, even if it was not identified, and to promote your great products.