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I have a 2005 Jaguar VDP 4.2. Very hard start. Removed fuel pressure sensor and huge amount of air came out with fuel. Please help.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 255 Answers

SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

  • 7 Answers

SOURCE: This car is unsolve able ???????

Hi, This Might have nothing to do with your problem, but you have nothing to loose by the sounds of it, the breather pipe from the bottom of the sump (behind the starter motor) to the top of the rocker box, mine was clogged up with slug like greese causing sencer problems and giving false information to the computer. (running rought) you got nothink to loose, try it.

Chris

Posted on Aug 29, 2008

  • 1 Answer

SOURCE: location Fuel Tank Pressure Sensor on a 2005 chevy express van

lOOK UNDER THE REAR OF THE VEHICLE ABOVE THE SPARE TIRE ON A CROSSMEMBER BETWEEN THE FRAME RAILS.

Posted on Apr 24, 2009

  • 274 Answers

SOURCE: My 1998 ford mustang v6 3.8l .. is hard to start

So what you saying is it's hard to start cold right? Something in computer system not allowing excess fuel to injectors when cold. Probably sensor Get auto electrician to sort it out otherwise you end up replacing things that there is nothing wrong with They got the right gear

Posted on Jan 27, 2010

creg_912
  • 196 Answers

SOURCE: 2003 xtype jaguar suddenly turned off i check fuel pressure none so it says engine fault gear box help help please

check your inertia switch on the passenger side kick panel.It is a red switch that control fuel pump pressure.Check and see if its engaged etc.You should here the pump once you turn the key to phase two.This is a start..it the switch is not the issue, check the fuel pump fuse.

Posted on Apr 22, 2014

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1 Answer

Hi, I have a 2005 Jaguar VDP 4.2L. Very hard start. Have changed upper intake, Mass Air Sensor, Crank sensor, Fuel filter, some coils 3 & 5. Fuel pump is working. 180k miles


chek fuel pressure test then do a compression test on all cylinders should be at least 150- 175 psi the early engines suffered from prematually worn out nicosil coated cylinder bores but your engine is poss way after that but 1st thing comes to mind is low compression, good luck

Dec 20, 2016 | Jaguar Cars & Trucks

1 Answer

Had a p305 on my 2005 buick rendezvous engine light is on changed the coil pack. it still hard to start unless i mashed the gas. it stalls at the light


Starting Mode
With the ignition switch in the ON position, before engaging the starter, the PCM energizes the fuel pump relay for 2 seconds allowing the fuel pump to build up pressure. The PCM first tests speed density, then switches to the mass air flow (MAF) sensor. The PCM also uses the engine coolant temperature (ECT), the throttle position (TP), and the manifold absolute pressure (MAP) sensors to determine the proper air/fuel ratio for starting. The PCM controls the amount of fuel delivered in the starting mode by changing the pulse width of the injectors. This is done by pulsing the injectors for very short times.
Clear Flood Mode
If the engine floods, clear the engine by pressing the accelerator pedal down to the floor and then crank the engine. When the throttle position (TP) sensor is at wide open throttle (WOT), the PCM reduces the injector pulse width in order to increase the air to fuel ratio. The PCM holds this injector rate as long as the throttle stays wide open and the engine speed is below a predetermined RPM. If the throttle is not held wide open, the PCM returns to the starting mode .
You could have a dirty or bad mass air flow sensor .
You could have

Mar 25, 2016 | Buick Rendezvous Cars & Trucks

2 Answers

What type of brake fluid can I add to a 2005 jaguar xj8 VDP? Can I use Valvoline Synthetic DOT 3&4?


Ask a parts auto place or jaguar dealer parts or service dept as they will also have what you need.

Nov 30, 2015 | 2005 Jaguar Vanden Plas

1 Answer

1994 Chevy Silverado 1500. RPMs ramp up on start up and then fall back down to normal. Runs real rich, gassy exhaust, and poor fuel economy. Changed fuel filter, cap and rotor, air filter, plugs and wires...


I can almost guarantee the engine coolant temperature sensor is faulty or very dirty. You will find it on the top of the intake manifold, just beside the thermostat or upper rad hose housing. It is a 2 wire sensor, brass. It can be removed with a 3/4" or 19mm deep socket. It is the primary input to the engine computer before the O2 sensors take control (after engine warms up). Don't attempt to remove when hot or under pressure, refill and bleed after. You will notice a huge difference to fuel economy.

Jan 26, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

Hi, I have a 2005 xjr and it pinks at about 4000 rpm when accelerating hard, I always use high grade fuel, just had new plugs, air filter, fuel filter. but it still does it. it runs smoothly poodling...


The pinking is due to either lean burn, high temperatures or overly advanced timing. If the mass air sensor is dirty then it may underestimate the volume of air entering the engine and therefore call on shorter injection cycles meaning less fuel = lean mix A faulty or slightly under-performing exhaust gas recirculation system would reduce the amount of inert exhaust gas from entering the combustion process and this will cause a high temperature lean burn situation. An under-performing crank sensor may yield erroneous timing signals to the ECU giving rise to an excessively advanced ignition causing the pinking. There may be error codes logged by the ECU which would help in the diagnosis.

Sep 12, 2010 | 2005 Jaguar Xjr

4 Answers

I have a v6 5-speed 4x4. truck will start and idle fine for about 2minutes and then die. it starts right back up. someone suggested the fuel pressure regulator is bad.


To me,it sounds more like a coolant sensor,or a idle air control valve.But unless further testing is done,it is hard to tell,check the fuel pressure,to see if it is good,at all times.Check to see if it is firing when it goes to shut off.If you are convenced it is in the fuel,try a additive called Lucas fuel treament,it is a good cleaner for injectors,and fuel pressure regulators,also,use the additive called,Heet,to dry any moister from the fuel.Water in the fuel will cause this also.

Feb 26, 2010 | 1992 Toyota Pickup

1 Answer

2000 Jaguar VDP with ~50K miles on, won't start


This may be a fuel problem. You will need to gain access to the fuel pump relay or fuel pump to confirm that voltage is available to the pump when the key is in the run position. A simplier way to verify fuel is to hook a fuel pressure gauge to the shrader valve on the fuel rail if one is available.

Nov 29, 2009 | 2000 Jaguar Vanden Plas

1 Answer

1994 XJ6 hard start problem


Check Air Flow meter/Sensor

Jul 08, 2009 | 1988 Jaguar XJ6

1 Answer

Engine light on 3 codes in system


The lean running codes are related to the p-1000 code...

Running lean on bank 1 and bank 2 means your oxygen sensors sense too much oxygen in your exhaust flow. This means either your engine is getting unmetered air (air that the engine does not know is coming in, therefore does not send fuel to compensate for...) (air that your mass air flow sensor does not see). You could have either a bad mass air flow (MAF) sensor (in the intake piping after the filter; this sensor tells your engine how much air it's taking in, so it can send the right amount of fuel through the injectors to properly burn with the air available with as little emissions as possible), or you could also have a cracked/broken intake piping after this sensor which lets air in the intake that the sensor does not measure... A large vacuum leak could also let unmetered air in the engine.

Or... Another possibility here would be low fuel pressure (bad fuel pump, bad fuel pressure regulator, fuel leak), as not enough fuel for the air would also cause the same lean condition.

It could be that some oxygen sensors are bad...

These conditions are hard to pinpoint exactly unless you have a scanner that can read sensor data (MAF Flow, fuel pressure, oxygen sensor values)...

The first thing I'd do would be to check for cracks or damage in the intake piping... If there is none, then it might be a low fuel pressure issue, or sensor problems...

May 08, 2009 | 2003 Jaguar X-Type

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