Acceleration stops!

one-eyed riley · 7th July 2014, 09:18

Hi gents
Had to replace the in-tank fuel pump on my CDTi but since then I get an occasional (every 1 - 2 weeks) situation where the car will not accelerate when the pedal is pushed, just stays at the same speed. This will go on for up to 10 seconds then clears. Then it is OK, all as normal. Only happens since the in-tank pump failed.
I don't think this is a failure of the in-tank pump as it happens with plenty of fuel in. Would it be an underbonnet pump problem? Any ideas welcome.
Thanks.

Avulon · 7th July 2014, 12:27

does a quick jiggle of the pedal make it go again?

Rick-sta · 7th July 2014, 12:53

When was the last time the fuel filter was renewed? A new fuel filter may help?

one-eyed riley · 7th July 2014, 21:48

Quote:

Originally Posted by Rick-sta

When was the last time the fuel filter was renewed? A new fuel filter may help?

Thanks, haven't tried that with the pedal. What would that indicate?

one-eyed riley · 7th July 2014, 21:50

Quote:

Originally Posted by Rick-sta

When was the last time the fuel filter was renewed? A new fuel filter may help?

I can try that. I changed it probably a couple of years ago so it will have done probably 10000 miles since. Thanks

one-eyed riley · 7th July 2014, 21:52

Quote:

Originally Posted by Avulon

does a quick jiggle of the pedal make it go again?

Thanks, haven't tried that with the pedal. What would that indicate?

Avulon · 7th July 2014, 23:05

Outside chance that the throttle potentiometer is faulty, If a quick jiggle of the pedal makes it respond again.

rich17865 · 8th July 2014, 06:53

Pull the plug from the fuel filter housing in the engine bay, liberally spray contact cleaner into both halves and plug it in again. Unplug and plug it a few times too.

See if that helps.

one-eyed riley · 8th July 2014, 18:41

Quote:

Originally Posted by rich17865

Pull the plug from the fuel filter housing in the engine bay, liberally spray contact cleaner into both halves and plug it in again. Unplug and plug it a few times too.

See if that helps.

Hi Rich, will give it a go, thanks. Would T4 help otherwise?

rich17865 · 8th July 2014, 20:57

Quote:

Originally Posted by one-eyed riley

Hi Rich, will give it a go, thanks. Would T4 help otherwise?

If that doesn't work, a T4 should give you a better idea than guesswork alone

7th July 2014, 09:18	#1
one-eyed riley Regular poster MG ZT-T CDTi 135 Join Date: Oct 2008 Location: Sandbach, Ches Posts: 50 Thanks: 6 Thanked 0 Times in 0 Posts	Acceleration stops! Hi gents Had to replace the in-tank fuel pump on my CDTi but since then I get an occasional (every 1 - 2 weeks) situation where the car will not accelerate when the pedal is pushed, just stays at the same speed. This will go on for up to 10 seconds then clears. Then it is OK, all as normal. Only happens since the in-tank pump failed. I don't think this is a failure of the in-tank pump as it happens with plenty of fuel in. Would it be an underbonnet pump problem? Any ideas welcome. Thanks.

7th July 2014, 12:27	#2
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	does a quick jiggle of the pedal make it go again? __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

7th July 2014, 12:53	#3
Rick-sta This is my second home MG ZT 2.0 CDTI+ in Typhoon, MG TF 135 in Typhoon & Rover 75 Connoisseur CDTI SE in Pearl Black Join Date: Oct 2012 Location: Norfolk Posts: 7,532 Thanks: 2,718 Thanked 2,827 Times in 1,462 Posts	When was the last time the fuel filter was renewed? A new fuel filter may help? __________________ How to retrofit Cruise Control on a diesel with no OEM wiring in place: Link How to retrofit heated electric memory seats with no OEM wiring in place: Link How to operate FBH and ATC via text Link How to restore cloudy projector headlights Link

7th July 2014, 23:05	#7
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	Outside chance that the throttle potentiometer is faulty, If a quick jiggle of the pedal makes it respond again. __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

8th July 2014, 06:53	#8
rich17865 This is my second home Transit Connect Join Date: Feb 2011 Location: Crewe Posts: 9,532 Thanks: 868 Thanked 1,619 Times in 1,095 Posts	Pull the plug from the fuel filter housing in the engine bay, liberally spray contact cleaner into both halves and plug it in again. Unplug and plug it a few times too. See if that helps.