How does fuel injection work on a Jeep Cherokee?
With the engine off, connect an accurate 0-689 kPa (0-100 psi) fuel gauge to the pressure test port fitting on the fuel rail. Start the vehicle and let engine idle.
What should the fuel gauge be on a Jeep Cherokee?
System fuel should be 214 kPa (31 psi) with the vacuum line connected to the regulator and 269 kPa (39 psi) with the vacuum line disconnected. CAUTION: Some fuel may be discharged when connecting fuel gauge to fuel rail.
When to replace fuel pump in Jeep Cherokee?
If fuel pressure drops approximately 138 kPa (20 psi), replace the fuel pressure regulator. If fuel pressure has dropped considerably more than 138 kPa (20 psi) fuel pressure is bleeding off past the outlet check valve in pump and the fuel pump must be replaced.
How does a fuel rail and injector cover kit work?
It reduces fuel rail and injector heat soak, reduces the chance of vapor lock, and keeps fuel cool. The easy to install kit includes one manifold heat shield, one fuel rail heat cover, six fuel injector covers, and 12 fuel injector O-rings.
With the engine off, connect an accurate 0-689 kPa (0-100 psi) fuel gauge to the pressure test port fitting on the fuel rail. Start the vehicle and let engine idle.
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.
If fuel pressure drops approximately 138 kPa (20 psi), replace the fuel pressure regulator. If fuel pressure has dropped considerably more than 138 kPa (20 psi) fuel pressure is bleeding off past the outlet check valve in pump and the fuel pump must be replaced.
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’s the fuel pressure on a Jeep Cherokee?
I purchased a fuel pressure gauge and am reading a constant 45 PSI when it is running. I noticed when I shut the Jeep off, the fuel pressure was quickly dropping off on the gauge. From my understanding the fuel pressure should NOT drop when shutting off the vehicle.
Can a bad fuel injector cause a jeep to go bad?
That being said, bad fuel injectors are one of the more common issues that happen to any vehicle (Jeep Cherokee included). There’s always more than one, and one going bad is enough to make a noticeable impact on the drivability of the vehicle. There are two main ways that your injectors can go bad.