horrendous misfire

cmannablep6 · 22nd November 2014, 20:30

My Zt has a horrendous misfire sometimes dosent make any difference if you press throttle . Other times only runs under full throttle . Swapped coil packs leads plugs and had good clean of all terminal blocks . Any ideas? appreciate any feed back. After time the misfire clears and everything runs fine for a while .Started off just when hot but now does it from cold Cheers .

LotusLC · 22nd November 2014, 21:00

Post this in the Technical part , it will get better coverage

Welcome by the way ....

Dragrad · 22nd November 2014, 21:05

Thread moved to appropriate forum. Re-direct left in old.

SD1too · 23rd November 2014, 11:00

Quote:

Originally Posted by cmannablep6

My Zt has a horrendous misfire sometimes dosent make any difference if you press throttle .. Any ideas?

This may be a fuel supply problem Clive; a common problem with the filter. We call it FFS: fuel filter syndrome. What happens is that the two halves of the fuel filter cannister work loose and fuel pressure drops. Eventually the engine doesn't start at all.

To check for this you'll need to lift the rear seat cushion and remove the access plate on the passenger side. The filter is a large plastic cylinder about the size of a tin of dog food. Whatever you do, do not take it apart. Simply grasp the base and the lid to see if it can be tightened. If it can, you can buy a specially designed clip (called the fabled orange clip (FOC)) which prevents a recurrance.

Searching the forum for these terms will yield more information and useful photographs.

Simon

minimutly · 23rd November 2014, 20:36

While your at it have a look in the bottom of the tank for water, if it's there you'll see it easy enough.
Huw

rich17865 · 23rd November 2014, 22:18

Is your car a turbo?

22nd November 2014, 20:30	#1
cmannablep6 Newbie mgzt+turbo Join Date: Nov 2014 Location: Derby Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	horrendous misfire My Zt has a horrendous misfire sometimes dosent make any difference if you press throttle . Other times only runs under full throttle . Swapped coil packs leads plugs and had good clean of all terminal blocks . Any ideas? appreciate any feed back. After time the misfire clears and everything runs fine for a while .Started off just when hot but now does it from cold Cheers .

22nd November 2014, 21:00	#2
LotusLC This is my second home MG ZT CDTi Auto / ZT-T Trophy Blue Join Date: Nov 2013 Location: York Posts: 3,981 Thanks: 3,329 Thanked 1,644 Times in 1,238 Posts	Post this in the Technical part , it will get better coverage Welcome by the way .... __________________ Lotus Carlton - Number 852 (My old car) https://i.imgur.com/Cwa3376m.jpg Last edited by LotusLC; 22nd November 2014 at 21:06..

22nd November 2014, 21:05	#3
Dragrad This is my second home *None DROWNED** Join Date: Aug 2007 Location: Cardigan Posts: 33,339 Thanks: 1,257 Thanked 1,664 Times in 1,081 Posts	Thread moved to appropriate forum. Re-direct left in old. __________________ Andrew Ich Dien Problem solving is... lateral thinking SEARCH FIRST ...ASK LATER...

23rd November 2014, 20:36	#5
minimutly Posted a thing or two mg zt Join Date: Mar 2014 Location: cardigan Posts: 1,087 Thanks: 28 Thanked 187 Times in 158 Posts	While your at it have a look in the bottom of the tank for water, if it's there you'll see it easy enough. Huw

23rd November 2014, 22:18	#6
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	Is your car a turbo?