What kind of fuel injection does a Jeep Cherokee use?
To properly diagnose your system you must check fuel pressure using a fuel pressure guage. Test procedures are intended for RENIX 4.0L engines only. 2.5L engines have THROTTLE BODY INJECTION and HO engines have a different fuel system!
What should the fuel pressure be on a Jeep Cherokee?
Fuel pressure should be approximately 214 kPa (31 psi). If fuel pressure is not approximately 55-69 kPa (8-10 psi) higher with vacuum line removed from regulator, inspect pressure regulator vacuum line for leaks, kinks or blockage.
What kind of fuel injection does a 4.0L engine use?
Test procedures are intended for RENIX 4.0L engines only. 2.5L engines have THROTTLE BODY INJECTION and HO engines have a different fuel system! The MPI fuel system used in vehicles equipped with a 4.OL engine employs a vacuum balanced pressure regulator.
What kind of engine does a Jeep Cherokee XJ have?
Some drivers faced the engine overheating and a raw gas odor. In 1991 the Cherokee XJ gained the High-Output version of the 4.0-liter engine. It came equipped with a multi-port fuel injection system to produce 190 hp. This was pretty much the only change it saw for nearly a decade, until 1999.
To properly diagnose your system you must check fuel pressure using a fuel pressure guage. Test procedures are intended for RENIX 4.0L engines only. 2.5L engines have THROTTLE BODY INJECTION and HO engines have a different fuel system!
Fuel pressure should be approximately 214 kPa (31 psi). If fuel pressure is not approximately 55-69 kPa (8-10 psi) higher with vacuum line removed from regulator, inspect pressure regulator vacuum line for leaks, kinks or blockage.
When did the Jeep 4.0 engine come out?
The first 4.0 engines in 1987 had RENIX (Renault/Bendix) engine control systems, which were quite advanced for their time, but are now handicapped because there are very few scan tools which can be “plugged in” to a RENIX system for diagnosis.
Test procedures are intended for RENIX 4.0L engines only. 2.5L engines have THROTTLE BODY INJECTION and HO engines have a different fuel system! The MPI fuel system used in vehicles equipped with a 4.OL engine employs a vacuum balanced pressure regulator.