Koolbananass

Hi

I did some research but keep coming up empty.
The 4x4 in question is a 94 4.5l petrol lpg convertion resent head gasket repair (friend of the family)

Issue I am having is a missing diagnostics port. Checked engine bay left hand and right hand side fenders. Underneath dash drivers and passenger side. Had Toyota tech looking as well no luck. Will post pictures later

Reason for looking check engine light on since head gasket repair.

My sister got a new small 4 cylinder car so I have it now to try and sort issues.

Higher fuel usage 80 litres lpg 250 km max
Radom loss of power on petrol no issues at all on lpg exept economy

In the last week
Checked plugs appear good
Changed fuel filter
Cleaned maf sensor & throtle body (found a lot of oil in the in air intake)

Issue still persisting Next steps
Change fuel pump (already got it just need to get the time)
injector change/service

Unless I find the diagnostics port first

There is also a few loss plugs passenger side fender and under passenger side dash one long plug?


Any other ideas