Paradoxia0
|
| posted on 16/3/08 at 03:01 PM |
|
|
Zetec running badly
Hi All
Again, working on the other halfs Mundano and to my mind it is missfiring...
It ticks over ok, and drives OKish, but there is definitely something not right with it. It judders and lurches under acceleration, sometimes only a
little, othertimes badly (light if you plant your right foot it feels like it will stall so have to lift off again).
Anyone have any ideas what it may be as I am at a loss!
One suggestion I have had is get it plugged into a fault finder, but I really cannot afford to pay maindealer prices 
Thanks
Mark
|
|
|
|
|
Schrodinger
|
| posted on 16/3/08 at 03:22 PM |
|
|
It could be the coil ISTR that they do brake down.
I would take it to an independant garage if you have one local and ask them to do the diagnostics the Mondeo will be OBDII compliant and I would guess
that most Indies have the diagnostic kit to check it.
Keith
Aviemore
|
|
|
bob
|
| posted on 16/3/08 at 03:38 PM |
|
|
HT leads
I had the same problem on my escort after an engine service last year, after a bit of fiddling i found one of the plug leads was failing. Managed to
catch it running lumpy with the bonnet up, when i pressed down on the leads into the head one of them made a significant difference and i found it
just wasnt snapping onto the plug properly. Changed the one lead and all was ok, i think i might have damaged the lead myself when removing to change
the plugs as they are sometimes a bugger to get out.
|
|
|
saigonij
|
| posted on 16/3/08 at 03:42 PM |
|
|
could be a dodgy throttle potentiometer. that would give the symptoms you describe
|
|
|
stevebubs
|
| posted on 16/3/08 at 04:05 PM |
|
|
I would check the following (in this order)
Leads/plugs
Coil
MAF
|
|
|
coozer
|
| posted on 16/3/08 at 04:40 PM |
|
|
EGR valve blocked, crankcase breather valve blocked?
1972 V8 Jago
1980 Z750
|
|
|
muzchap
|
| posted on 16/3/08 at 04:42 PM |
|
|
Agree with Steve - definitely in that order.
Most parts can be sourced cheap from breakers yards... HT Leads are expensive and are not commonly sold singularly - so nip down to the breakers and
grab some cheap. Even if they aren't the cause, you can sell them again... 
------------------------------------
If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
------------------------------------
|
|
|
Monkeybasher
|
| posted on 16/3/08 at 04:55 PM |
|
|
Just had a knackered coil on a 2.0l focus giving a weak spark on 1 and weak to no spark on 4.
I removed each lead from the plug one at a time while the car was running.
You could clearly hear it arcing on 2 and 3 and a little on 1 but next to nothing on 4. Removing the lead from 4 hardly effected the running of the
car.
This is the quickest way to narrow it down to a cylinder, when removing a lead that has little effect on the running of the car you know which
cylinder the fault lies with, or cylinders.
Steve
|
|
|
rusty nuts
|
| posted on 16/3/08 at 06:20 PM |
|
|
If you try pulling off the HT leads as above make sure you use a pair of insulated pliers preferably plug lead pliers. 40,000+ volts gives a bit of a
shock!
|
|
|
britishtrident
|
| posted on 16/3/08 at 06:30 PM |
|
|
Plugs + Plug leads
Coil unit
Fuel pump/filter
Fords use a massive plug gap which can cause a lot of ht problems this is not helped by the extended plug change intervals now specified, if the plugs
are flailing it is usually best to fit plug leads as well to fit plug leads as well.
I find setting the gaps to a lower figure than the Ford recommended leads to fewer problems later down the line.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
Paradoxia0
|
| posted on 16/3/08 at 06:47 PM |
|
|
Thanks for all of the advice guys
I tried the pulling the plug leads off trick and strangely there was no change at all when I removed the lead from cylinder 3...
I have already fitted new plugs last weekend (or was it the weekend before?) which didn't help so the leads look like a very good place to try
next!
Thansk
Mark
|
|
|
Paradoxia0
|
| posted on 20/3/08 at 10:44 PM |
|
|
Hi All
Thanks again for the advice, it did turn out to be the HT leads. The car runs sooooo much better now!
All I have left now is the to fix the rattling exhaust and why the (new) temp sender isn't working, but they are minor (i.e. I don't have
to buy her a new car  )
Mark
|
|
|
bob
|
| posted on 21/3/08 at 10:58 AM |
|
|
Its a nice feeling when you can sort a problem for not so many £££'s 
|
|
|
Monkeybasher
|
| posted on 21/3/08 at 07:12 PM |
|
|
Pleased for you,
If your like me you always think the worst and it rarely is that bad.
Steve
|
|
|
.jpg)
