Right I have found the problem with my 2.1 x type. When the bogging starts the car is fuel cut due to engine load or deceleration. When at WOT or more then half throttle I have had new map and even unplugged it but no help there and the TPS is all in speck. So I want to know how dose the xtype fuel cut is it at the pump or injectors as I have wired the pump into a switch into a switched ignition off the inertia switch power out. Now I haven't tested the car but will this stop the car from fuel cutting or is it injectors it cuts at?

 

Fuel cutoff is done at the injectors by the ECU.

 

If it cuts the fuel it has a reason. Fix the cause properly. Don't mess around - you'll just buy grief.

Please spend a bit longer when you post to make your posts clear English instead of hard to grasp stuff.

 

Yes I am trying to find out why. I have replaced plugs all coils crank sensor both cam sensors. Vvt sensors fuel pump. Knock sensor TPS map and maf lambas upstream and down stream. Checked cats there fine. Replaced the fuel pressure regulator and all injectors.
Is there anything else you could think of? As I say if I just hold clutch in at 60 shut ignition off the restart instantly she runs fine for 2 miles.

I am truly sorry about my spelling. I am dyslexic but that's not an excuse. I relay on auto correct. And the way I word things is I am normally on bike forums. But again thank you and I'm sorry about my spelling I do try my best?

 

[QUOTE Please spend a bit longer when you post to make your posts clear English instead of hard to grasp stuff.[/QUOTE]

I hope that's taught you to wind your neck in, instead of being so quick to jump down peoples throats. The poor guy is doing his best, last time I checked it was a Jaguar forum not a finishing school.
So don't live up to the Yorkshire reputation of being 'thick in t'arm, and thick in t'ead.
By 'eck now I'm guilty of writing hard to grasp stuff!

 

Yes I know it's a forum and did not mean to offend anyone I'm just sick of the car and shouldn't take it out on this. I am sorry. And I'm not from Yorkshire I'm north east of Scotland Aberdeen.

 

You have no need to apologise for anything, you haven't offended anyone.
I found Jagv8's comments offensive so I was criticising him for being a bit harsh on you. You just ask away and hopefully one of us will have an answer to your problem.
Can you get hold of a code reader that shows live data, then you can drive and see what happens to the injector signal when the engine cuts, also monitor the fuel pressure, either of these will give you an idea of what is stopping the fuel flow. Also you can monitor other sensors to see if one is failing and causing the shut off.

 

Before getting into a lot of analysis and electronics I have a simple question.

When was the last time the fuel filter was changed? It could be shutting off flow and once pressure is reduced (restarting) it allows some flow.

 

Pardon me but I had trouble understanding his post due to the poor English. Please help him fix his (car) problem.

 

Hi I have replaced fuel filter when problem arised and no help. Also fitted a new fuel pump just the pump still no help then used a Nissan skyline gtr walbro 255lph pump still not a change. I have replaced all sensors. The fuel trims never went above +10 or - 10 the only thing is when I put my foot down when the car is not fully at operating tempruture it switches from closed loop to open loop (which is normal so the car can produce as much power to accelerate) then when I just return throttle to hold say 70mph it switches back to closed loop for economy. But when I have the problem I will say driving for about 10 minutes at operating temperature. Put my foot down car just goes into open loop fuel cut due to engine load or deceleration. I have checked the TPS and it is all with in speck and it shows 100% when my foot is hard to the floor struggling to go over 1500 rpm in any gear. Now this is the problem there are no codes what so ever I have used my laptop a 2000 pound hand held scanner. All garages I've talked to and jaguar independent specialists don't have a clew where to start. the fuel system on the 2.1 has a semi-return fuel system as the 2.5 and 3.0 have a return less with a fuel sensor on the rail the 2.1 does not so the pump runs all the time on the 2.1 as the 2.5 and 3.0 have a fuel pump module to control voltage. So the 2.1 returns to tank after fuel filter with a fuel pressure regulator in the pump housing. I will no doing some live runs with 2 fuel pressure gauges installed one on the rail into the car and one at the just before fuel filter on Monday.
Just for some of you guys to know so throw anything at my as I'm able to do anything as I know what I'm doing and confident. I did after all squeeze 423bhp out of a N16 Nissan Almera 1.8 running a custom turbo set up and fully built engine with a fully custom ecm. It is my track car. (That car was Easter to build than the xtype is to fit)