Fuel system identification, Page 6, Continuous injection system fig.b – MAHLE RTI ESX-2 User Manual
Page 7: Continuous injection system fig.a, Port fuel injection fig. a, Port fuel injection fig. b, Carburetor fig. b, Carburetor fig. a, Throttle body fig. a, Throttle body fig. b

Page 6
CONTINUOUS INJECTION SYSTEM FIG.B
FUEL DISTRIBUTOR
FUEL DISTRIBUTOR
CONTINUOUS INJECTION SYSTEM FIG.A
VEHICLE FUEL TANK
VEHICLE FUEL TANK
FILTER
PRESSURE LINE
ADAPTER
RETURN LINE
ADAPTER
ADAPTER
LOOP
ADAPTER
RETURN LINE
ADAPTER
FUEL
REGULATOR
PRESSURE
ESX BLACK HOSE
TEE ADAPTER
LOOP ADAPTER
RETURN LINE
ADAPTER
PRESSURE LINE
FILTER
ADAPTER
ESX RED HOSE
ADAPTER
RETURN LINE
REGULATOR
FUEL
PRESSURE
ADAPTER
PRESSURE LINE
ESX RED HOSE
PORT FUEL INJECTION FIG. A
VEHICLE FUEL TANK
PORT FUEL INJECTION FIG. B
VEHICLE FUEL TANK
LOOP ADAPTER
TEE ADAPTER
ADAPTER
ESX BLACK HOSE
PRESSURE LINE
RETURN LINE
FILTER
ADAPTER
ADAPTER
LOOP
PRESSURE LINE
RETURN LINE
FILTER
ADAPTER
ADAPTER
ESX RED HOSE
ADAPTER
ADAPTER
RETURN LINE
FUEL RAIL
PRESSURE
REGULATOR
FUEL
PRESSURE LINE
ADAPTER
ADAPTER
RETURN LINE
REGULATOR
PRESSURE
FUEL
FUEL RAIL
PRESSURE LINE
ESX RED HOSE
CARBURETOR FIG. B
ESX RED HOSE
THE CARBURETOR
GOING INTO
ADAPTER
CARBURETOR FIG. A
VEHICLE FUEL TANK
COMING FROM
FUEL PUMP
SUPPLY LINE
FUEL PUMP
ADAPTER
VEHICLE FUEL TANK
LOOP ADAPTER
FUEL PUMP
COMING FROM
FUEL PUMP
ADAPTER
ESX RED HOSE
SUPPLY LINE
TEE
THE CARBURETOR
CARBURETOR
GOING INTO
CARBURETOR
THROTTLE BODY FIG. A
TEE ADAPTER
THROTTLE BODY FIG. B
FILTER
FILTER
VEHICLE FUEL TANK
VEHICLE FUEL TANK
ADAPTER
ADAPTER
RETURN LINE
PRESSURE LINE
LOOP
ADAPTER
ESX BLACK HOSE
ADAPTER
RETURN LINE
PRESSURE LINE
THROTTLE BODY UNIT
ADAPTER
ESX RED HOSE
PRESSURE LINE
ADAPTER
RETURN LINE
THROTTLE BODY UNIT
LOOP ADAPTER
ADAPTER
PRESSURE LINE
ADAPTER
ADAPTER
RETURN LINE
ESX RED HOSE
Fuel System Identification
The Fuel System type must be determined before proceeding with any cleaning or diagnostic
procedures. The following four systems are the only types that can be serviced with the RTI ESX
unit.
Port Fuel Injection (PFI)- This system uses a single electronic injector per cylinder,
mounted such that fuel spray is directed into the intake port. (See Page 7)
Throttle Body Injection (TBI) - Centrally mounted, like the carburetor system, but utilizes
one or two electronic injectors. (See Page 11)
Continuous Injection System (CIS) - Look for the fuel distributor with solid steel or flex
steel lines running from the fuel distributor to each individual injector. The fuel distributor
controls the amount of fuel sprayed into the intake port while the injector controls opening
and closing pressure. (See Page 15)
Carburetor System - Sizes and shapes vary, but these systems are easily identified by
locating the choke plate underneath the air filter housing. (See Page 19)