Phantom Posted June 16, 2011 Share Posted June 16, 2011 Got a D2 Td5, when you start her up she's 'lumpy'and won't rev in any way what ever you do with the throttle ( Hot and cold ). After a wait, 20 seconds, sometimes a minute you can hear the engine note change and she rev's and drives fine. Today I popped a fuel pump in her, new fuel pump relay, new filter, new MAF sensor( also tried the old one unplugged ) and pulled out the ECU and injection harness ( no oil in either ). Plugged into Hawkeye and no faults. You can leave her for an hour or start her immeadiatly after stopping the engine and every time she won't rev, until the engine note changes and then all OK What to do next? Thanks in advance Lee Quote Link to comment Share on other sites More sharing options...
Modchop Posted June 16, 2011 Share Posted June 16, 2011 Have you checked that the turbo wastegate is 'free' and not sticking closed? Also I've heard of similar symptoms when crankshaft position sensor is duff. HTH Quote Link to comment Share on other sites More sharing options...
phil37 Posted June 20, 2011 Share Posted June 20, 2011 Got a D2 Td5, when you start her up she's 'lumpy'and won't rev in any way what ever you do with the throttle ( Hot and cold ). After a wait, 20 seconds, sometimes a minute you can hear the engine note change and she rev's and drives fine. Today I popped a fuel pump in her, new fuel pump relay, new filter, new MAF sensor( also tried the old one unplugged ) and pulled out the ECU and injection harness ( no oil in either ). Plugged into Hawkeye and no faults. You can leave her for an hour or start her immeadiatly after stopping the engine and every time she won't rev, until the engine note changes and then all OK What to do next? Thanks in advance Lee Hi lee when this problem appears have you noticed if the glow plug light comes on? phil Quote Link to comment Share on other sites More sharing options...
Pete james Posted January 25, 2021 Share Posted January 25, 2021 Hi phantom did you ever get to the bottom of this? Mines just started doing exactly the same😆 Quote Link to comment Share on other sites More sharing options...
Simon_CSK Posted January 25, 2021 Share Posted January 25, 2021 I had a similar problem however the car went into limp mode. When I got to the bottom of my problem I required a new throttle pedal. Really need to plug it into a computer to see what is going wrong. Quote Link to comment Share on other sites More sharing options...
Escape Posted January 26, 2021 Share Posted January 26, 2021 If diagnostics indicate a problem with the throttle pedal, make sure to check the wiring before replacing the pedal. I've had a customer with a TD5 that would go into limp mode seemingly at random, especially in wet weather. Turned out the wiring loom was chafed and when moisture got in that would interfere with the signal from the pedal potentiometer. Cheap fix with shrinkwrap and tape. Filip Quote Link to comment Share on other sites More sharing options...
BogMonster Posted January 28, 2021 Share Posted January 28, 2021 The pedal has (depending on age) either two or three 'driver demand' potentiometers. The ECU checks these against each other (largely a safety net that means you don't get a failure which gives you 100% throttle... an electronic spring on the injector pump if you like) so if there is a mismatch then it won't rev. You need a diagnostic to get a live readout of the pedal track outputs and check for driver demand faults. It is most likely to be the pedal but not always. Make sure you get the right sort of pedal (part number off the pedal assy) if you are ordering one. Quote Link to comment Share on other sites More sharing options...
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