loss of power td4

Hi guys, need some pointers. Have a 53 TD4auto, she starts and runs perfectly then without warning the mil light comes on and the throttle drops to tickover after 5 seconds ish she revs up and away she goes as normal, the light goes off and she is fine. It could go a mile or 30miles before it happens. The under wheel arch pump and filter have been renewed and she goes well until this intermittent fault happens then fine 5 secs later, anybody any ideas? Second can anyone confirm, is the in line fuel pump under the arch the only one or is there a pump in the tank as well, seems strange to have 2 pumps up to the hp inj pump but the more i read some say 1 tank 1 inline and some say up to 53 tank after 53 inline, help me please,lol. Thanks

If you have the pump just in front of the rear wheel arch then Im pretty sure you havent got a pump in your tank.

Take a look at the plug on the end of the fuel rail - these can green up - fairly common. Caused me lots of problems when I first got my Freelander.

good luck

thanks for that, never thought of that, will take a look first thing, cheers

Ok , While trying to help a chap for a td5 coolant sensor location, I typed in a goggle search(location of coolant sensor for td5 land rover) it became aware that the coolant sensor helps the td4, td5 on cold start up by not allowing a over fueling until engine warms up. With the sensor failing as not working it can cause a power loss, lack of power by telling the ecu i'm still a cold motor. sensor should be telling the ecu I AM WARM I NEED MORE FUEL TO RUN. so check it out?

Got a 2003 TD4 Auto & by a wierd coincidence have had exactly the same problem for about a year now !!, like you say the engine just goes to idle for no apparent reason, most times after a few seconds the throttle starts to respond again but sometimes the check engine light stays on & I had to cycle the ignition off/on. The other day while the analyser was plugged in for a different fault it happened & the fault recorded was "P0220 pedal demand sensor B", yesterday I "borrowed" the throttle pedal/potentiometer from my manual TD4, went for a 50 mile test drive & it seems to be fixed, will be driving about 400 miles this weekend so will confirm if it's fixed when I get back. The good news is the replacement for mine is £27 + vat, this is hard to believe because it comes with the throttle pedal & sensor complete.

Thanks for that matacalbo, that one would never have even entered my head, plugged in the odb on live and lo and behold it occurred after 5miles or so but the mil literally went off in a split second so it didnt register a code, would be greatly appreciated if you could let me know how your 400mile trek goes and where did you get the pedal unit from so cheap? Thanks Alan

Just got back, 380 miles & some pretty tricky green lanes & not so much as a flicker of the mil light & no cutting to idle, I'm well chuffed it's fixed as we're off the Pyrenees on Saturday, it would have made it an "interesting" trip to say the least.
Getting the replacment from Famous Four at Louth, should be picking it up tomorrow, I'll let you know if the quoted price is correct. You will need to give them your vin number of course.

Well £27 for the throttle sensor was correct (plus Georges 20%of course), its bloody amazing really cos it includes the bracket, the pedal & the 2 sensors (potentiometers).

Had similar fault today. Lost all power after approx 6 miles, finally died, 4o min wait for RAC man who tried the key and off!! Followed me to work approx 4 more miles, still gutless however, his diagnostics gave no indicators and the MIL lamp never came on. Local LR independant diagnostics suggest high pressue fuel sensor, cables and connector block seem clean and ok. Came home ok!! Intermittent on sensor???
Socket size for the blighter anyone? Thanks

Right well I may have gone off half cocked, the problem wasn't the throttle pedal but the aftermarket cruise control I had fitted (which connects into the throttle pedal circuit ). When I changed the throttle pedal I left the cruise control disconnected cos it was easier to connect the new pedal that way, never suspected it was the cruise control causing the problem. Reconnected it before setting off for the Pyrenees & yesterday the problem reappeared with a vengence twice, right in the middle of Chartres, engine cut to idle & no throttle response, locals were going berzerk but luckily the hand signal for wanquer (French spelling) is the same here !!. Immediately disconnected the cruise again & the problem disappeared. I can't remember what make the cruise control is but I think the problem might be with the installation itself. It's possible that your problem is with the throttle pedal, like I say the cruise circuit is in series with the throttle sensor & have been told that it isn't uncommon for the throttle sensor to fail.