Fuel is leaking in engine area. Hard to start and runs rough most of the time. Idles high and sometimes surges when stopped at stop light. Any ideas? Thanks.

. Check the under hood fuel filter.

. Check fuel lines--use flare wrenches, to ensure they're tight.

. Check injectors.

Take a look at this link:

https://www.askmehelpdesk.com/cars-t...ml#post1415281

Would the fuel leakage cause the engine to run rough and surge?

Don't know if frame mounted fuel filter has ever been changed and how do I purge the filters?

Yes.

On some PSDs, you open the purge valve beneath the under hood fuel filter.