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#781100 - 28th Mar 2013 10:22am Car Firing on 3 Cylinders
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
My 2001 focus is only firing on 3 cylinders. Cylinder 1 is at fault. I've replaced the coil pack, all leads and plugs but problem still persists. Could it be a blocked injector or something more serious?
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#781103 - 28th Mar 2013 10:47am Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Willo_ Offline
Forum Master

Registered: 5th Jul 2012
Posts: 2518
Loc: Merseyside
Originally Posted By: ShaunTheSheep
My 2001 focus is only firing on 3 cylinders. Cylinder 1 is at fault. I've replaced the coil pack, all leads and plugs but problem still persists. Could it be a blocked injector or something more serious?
Turn ignition off, press and hold the mileage trip reset button, and turn ignition on so red lights show, keep trip button pressed in, untill the word test shows up on milaeage display, let go of button, the dials do a full sweep press again all bulbs on display light up and just keep pressing untill DTC shows up and let go it will then show a dtc code write it down, then press button again and see if it shows any more.

Full instructions.

Some of the different Functions

Functions

1 Gage Test
2 Dial Test
3 Bulb Test
4 Diagnostic Check
5 Diagnostic Check
6 Clock Type (shows ?date 44? if UK)
7 Diagnostic Check
8 Speed MPH
9 Speed KPH
10 Revs
11 Fuel
12 Engine Type
13 Temp of Engine
14 Battery Voltage
15 Diagnostic Check
16 LCD Display



Diagnostic Check (18-30)

Pretty easy really!

1) With the ignition switched off press and hold the trip computer reset button.

2) Switch the ignition on.

3) Release the reset button

4) The above will be displayed with each press of the button.

5) To exit this mode switch the key off. When you switch it back on again the dash will return to normal.

You can look up dtc codes here Clicky here and here.


Edited by BurgerChips (28th Mar 2013 10:49am)
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#781105 - 28th Mar 2013 11:06am Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
Done exactly what you said, then this flashed.. dtc - none.
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#781110 - 28th Mar 2013 11:26am Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Vanmanone Offline

Forum Guardian

Registered: 5th May 2010
Posts: 3436
Loc: The Rectory Eastham
Are you getting a spark trying various plugs .. I would of gone with coil packs for sure

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#781114 - 28th Mar 2013 11:31am Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
All plugs and leads are firing. New coil, new leads and new plugs. ?? :-/
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#781116 - 28th Mar 2013 11:37am Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
Would it be worth getting some redex, flush my injectors?
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#781129 - 28th Mar 2013 1:08pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Willo_ Offline
Forum Master

Registered: 5th Jul 2012
Posts: 2518
Loc: Merseyside
Originally Posted By: ShaunTheSheep
Would it be worth getting some redex, flush my injectors?
This is how I cleaned my injectors, and I noticed a big difference.
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#781194 - 28th Mar 2013 5:06pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
_Ste_ Offline


Wiki Master

Registered: 7th Aug 2005
Posts: 16023
Loc: New Brighton
take injector leads off and on 1 by 1 and you should hear the engine change note slightly, if it doesn't change on a certain injector, thats your faulty one.

Do it with engine running.
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#781203 - 28th Mar 2013 5:28pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
StuyMac Offline

Wiki Master

Registered: 24th Nov 2003
Posts: 12002
Loc: Wirralshire
Ste - thats only useful for finding where the problem is, I think he mentioned it was No1...?

If thats the case, try moving an injector between pots and see if the fault moves with the injector.
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#781211 - 28th Mar 2013 5:41pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
I took the plug out of 1 but made it worse. So don't think its injecter. So if its not injecter and plugs, what next?
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#781232 - 28th Mar 2013 6:33pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Willo_ Offline
Forum Master

Registered: 5th Jul 2012
Posts: 2518
Loc: Merseyside
What engine is it ?

If the coil pack did go, some times when the coil packs fail they can damage the output circuit within the ECU itself.

Also check the inlet manifold gasket for air leaks using carb cleaner or similar.


Edited by BurgerChips (28th Mar 2013 6:36pm)
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#781239 - 28th Mar 2013 6:39pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
its a 2.0 petrol, forgot to mention is also converted to lpg
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#781242 - 28th Mar 2013 6:45pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Willo_ Offline
Forum Master

Registered: 5th Jul 2012
Posts: 2518
Loc: Merseyside
Get some carb cleaner, and with engine running spray it around inlet manifold and clean the mass airflow sensor on air intake, but you can never really clean these properly, but as a temp measure clean with electrical contact cleaner.

I have funny feeling it will be air leak somewhere (if you have ruled out plugs leads and coil pack) and carb cleaner should find it.


Edited by BurgerChips (28th Mar 2013 6:45pm)
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#781269 - 28th Mar 2013 8:07pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
Vanmanone Offline

Forum Guardian

Registered: 5th May 2010
Posts: 3436
Loc: The Rectory Eastham
Originally Posted By: ShaunTheSheep
its a 2.0 petrol, forgot to mention is also converted to lpg

Now then .. does it run ok on gas try switchin from one to the other .. we may be able to rule out the injector

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#781276 - 28th Mar 2013 8:11pm Re: Car Firing on 3 Cylinders [Re: ShaunTheSheep]
ShaunTheSheep Offline
Addict

Registered: 9th Jul 2012
Posts: 216
Loc: Wallasey
Exactly the same on both..
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shaunthesheep

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