scutter
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| posted on 25/6/08 at 07:18 PM |
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Zetec running on 3 cylinders
As per title,
Newly started Megasquirt installation, is running on cylinders1,2,&3. 4 is cold, the exhaust hasn't blued up during running.
I've swapped injectors and plugs about with no joy, removed the plug and lead and ran the Edis in limp home mode got a spark from the plug,
when looking inside the cylinder the top of the piston is wet.
I've yet to source a compression tester, but the problem is starting to annoy .
Suspect coil pack and megasquirt i feel have been ruled out as they would show up as a pair of faults, or i'm talking out of my hoop again.
ATB Dan.
The less I worked, the more i liked it.
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bob
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| posted on 25/6/08 at 07:27 PM |
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Have you checked the plug leads dan, i had the same on No 4 when i got my megajolt up and running and it turned out to be a failing HT lead.
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piddy
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| posted on 25/6/08 at 07:30 PM |
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Ive had the same with faulty plugs.
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mr henderson
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| posted on 25/6/08 at 07:37 PM |
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Standard practice is to swap the leads and see if the problem stay on the same cylinder, if it does then swap the plugs, jst keep swapping stuff as
far as possible until the problem moves with the swap.
Nuisance to have to start on the injectors, hopefully it will be solved before that
John
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Taylor R1
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| posted on 25/6/08 at 08:10 PM |
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My daughters fiesta Zetec S had the same problem. Not firing on No 4 cylinder.
Turned out to be coil pack fault. Fired ok on 1,2,3 but not 4.
Replaced coil pack & has run OK since.
Hope this helps
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Mole
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| posted on 25/6/08 at 09:22 PM |
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Another vote for HT leads. Coil pack would mean only two cylinders on the Zetec-E
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turbodisplay
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| posted on 25/6/08 at 10:13 PM |
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Coil pack
Another vote for coil pack. coil output on 4 is shorted to ground.
Swap 4 and the corresponding coil output, see if 4 gets hot. Or check the resistance betwwen ht output and ground (earth) If less than 1Mohm (1000000
ohms) then coil pack is faulty.
Darren
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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big_wasa
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| posted on 25/6/08 at 10:30 PM |
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The last one I did was the leads but have had a couple of faulty coils.
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scutter
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| posted on 26/6/08 at 05:14 AM |
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Looks like a set of leads, we've tried 2 other coils, mind one was change when we were trying to start it, the other one was from the
fleebay!
Pity the orginal plug and lead worked in limp home mode, would this be any different when the plug is in the head?
ATB Dan.
The less I worked, the more i liked it.
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bigrich
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| posted on 26/6/08 at 06:48 AM |
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plugs fire very easily when in open air but have a much more difficut job doing so when under the effects of cylinder pressures and combustion
.JPG)
A pint for the gent and a white wine/fruit based drink for the lady. Those are the rules
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coozer
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| posted on 26/6/08 at 08:46 AM |
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Plugs for me. Mine was running lumpy with number 3 off and a new set as a starting point cured it.
Don't buy cheap leads either, puka Ford ones are needed for a good reliable engine.
1972 V8 Jago
1980 Z750
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scutter
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| posted on 26/6/08 at 12:33 PM |
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10 points and a blue smartie to all those that said plugs, a new set and she's a runner.
Time to get everything else together so i can do some on-road tuning.
Cheers Dan.
The less I worked, the more i liked it.
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