Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine executive and warm and later spray lighter gas /propane or brake cleaner re each joint in turn. If the engine rev s happening you ve found your leak.
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every repercussion in insufficient fuel brute delivered to the engine. Might next be worth cleaning out the idle swiftness govern motor / valve as these acquire clogged stirring similar to carbon and some brake cleaner washed through helps pardon things off.
Hello the TPS does have an effect upon switching the car into idle mode therefore I'd recommend to make clear the throttle dish is 100% closed and not slightly stranded in the manner of carbon. and later adapt the TPS for that reason that the IDL pin is continuous to the E2 pin later the throttle is closed, and open circuit with the throttle is just cracked. Don't cause problems practically any voltages, the IDL right to use is the in point of fact important one.