What causes a Jaguar X type to run lean?
Checking fuel pressure will give you an idea about the fuel filter or imminent failure of the fuel pump. Clogged fuel tank venting could also cause a reduced fuel pressure. A couple of fouled injectors could also be causing it to run lean. In 1984 I ran into a whole slew of Oldsmobiles that consistantly fouled injectors when using Texaco gas.
Why does my Jaguar XJS have poor fuel economy?
In summary, the fuel filter sold for the model was not manufactured to suit Honeywell’s specifics resulting in incorrect placement of the O-ring on the fuel line. Automatically, inadequate sealing will lead to leaking of oil out of the engine. Apart from being a fire hazard leaking fuel is a major cause of poor fuel economy.
Why is my Jaguar XJS prone to rust?
In this second section we will discuss these general issues and how they can be addressed. Because of the nature of the XJS body, it is prone to rust and rot on and inside various components. These areas susceptible to rust make it easier for components to corrode and fade away.
What to do about water leak in Jaguar XJS?
Mild contamination can be rubbed down and painted over with a fresh coat of paint. More serious rust or rote will require that sections be cut off and effectively replaced. Water leaks and oil leaks are popular with these vehicles. Water leaks for example are as a result of blockage within the air conditioning drain.
Checking fuel pressure will give you an idea about the fuel filter or imminent failure of the fuel pump. Clogged fuel tank venting could also cause a reduced fuel pressure. A couple of fouled injectors could also be causing it to run lean. In 1984 I ran into a whole slew of Oldsmobiles that consistantly fouled injectors when using Texaco gas.
Is there a vacuum leak on a Jaguar X-type?
I have checked all vacuum lines, sprayed carb cleaner around MAP sensor, Intake manifold gaskets, between throttle body and manifold and around all vacuum points. All are tight. I’ve cleaned the MAF sensor and throttle body. Ive read that fuel filter might need changed, but 95% of posts for Too lean on both banks point to vacuum leak.
Why does my Jaguar X-type give faulty cat code?
Nobody thinks about leaks AFTER the combustion, but it is still a leak BEFORE the sensor, and therefore it affects the readings and will also give faulty cat codes. So check your exhaust up to the cats for any leaks before you tear down the intake and good luck.
What causes a Oldsmobile to run too lean?
Clogged fuel tank venting could also cause a reduced fuel pressure. A couple of fouled injectors could also be causing it to run lean. In 1984 I ran into a whole slew of Oldsmobiles that consistantly fouled injectors when using Texaco gas.
What are the engine codes on a Jaguar X type?
Engine codes showed too leak bank 1 and 2. Shots of throttle cleaner identified the area to the rear of the intake. I found a bolt missing on ERG valve.
I have checked all vacuum lines, sprayed carb cleaner around MAP sensor, Intake manifold gaskets, between throttle body and manifold and around all vacuum points. All are tight. I’ve cleaned the MAF sensor and throttle body. Ive read that fuel filter might need changed, but 95% of posts for Too lean on both banks point to vacuum leak.
Where are the actuators on a Jaguar X-type?
There are two actuators (black & round) on the left side of the intake manifold that control the blending of short runner/long runner. The have round green gaskets under them that are known to leak and cause stumbling/rough idle, mixture problems, hissing, unmetered intake leakage.
What are the faults of a 2005 Jaguar X-type?
I have a 2005 Jaguar X-type. I had the same faults P0171 and P0174 and changed out the O-Ring, Air filter, Fuel filter, cleaned the MAF sensor and still no change. I then decided to change out the brake booster hose and sure enough, it had a nice size whole in the check valve (middle part).
Where to find post catalyst fuel trim system too lean Bank 1?
Connect the code scanner to the OBD port under the dash. Turn the key to “On” with the engine off. Depress the “Read” button and the codes display. Cross-reference any additional codes with the accompanying code sheet. Direct your attention to these codes first.
Can a Jaguar 2.5 be changed to a 3.0?
On the 2.5 the one closet to the rear can be changed in place by tilting it toward the front of the vehicle to remove and reinstall it. The 3.0 often requires removing the intake to replace it’s gaskets for those actuators. I bought the gaskets for my 2.5 but have not yet needed to replace them. They are not expensive. 5 people found this helpful.
Engine codes showed too leak bank 1 and 2. Shots of throttle cleaner identified the area to the rear of the intake. I found a bolt missing on ERG valve.
On the 2.5 the one closet to the rear can be changed in place by tilting it toward the front of the vehicle to remove and reinstall it. The 3.0 often requires removing the intake to replace it’s gaskets for those actuators. I bought the gaskets for my 2.5 but have not yet needed to replace them. They are not expensive. 5 people found this helpful.