Idle up and down hijet 993 efi



I have a hijet 1995 993cc efi. It's a romahome camper conversion.
All of the sudden it seems to have an idle issue and it's drinking fuel and stinks really rich.

I've checked the cooling system bled it and filled it all seems good there and the two pipes going to the throttle body seem to have fluid in also.

I've gone through as many vacuum lines I can find checked for any blockages all seems ok also.

It was running ok then just wouldn't idle properly all the sudden.

Any ideas what's worth checking?

Done a service yesterday all fluids are good and new plugs (old ones were black)

One other thing when I disconnect the TPS it seems to stop and just idles fine but higher rpm.

Any help would be great.