norfolkluego
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| posted on 2/5/10 at 06:12 PM |
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Coil pack query
Had a problem sprinting at Hethel today (apart from the wet and the cold and the wind), on our final run the car was running rough on cylinder 1 (well
the one closest to the coilpack anyway), carb was really spitting back through the trumpet. Remembered reading on here somewhere about the first thing
to go for is plugs and leads, whipped the entire coil pack plus leads off and replaced them with a spare set we had with us, hey presto, problem seems
to be gone. Is the problem likely to be in the coil pack itself or the lead and if one lead has packed up are they all likely to be on their way
out?
[Edited on 2/5/10 by norfolkluego]
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tomprescott
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| posted on 2/5/10 at 06:14 PM |
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More likely to be the lead than the coilpack
A bird in the hand....
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FrankP
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| posted on 2/5/10 at 06:18 PM |
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Hi,
The zetec coil pack fires 2 cylinders at a time. cylinder 1 is the one neares the cam belt at the front of the car.
If its only on 1 cylinder it maybe the leads - I have read elsewhere that zetecs eat cheap leads.
You could try and put a timing light on the leads to see if they are getting apulse.
Cheers
Frank
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dhutch
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| posted on 2/5/10 at 06:33 PM |
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Yeah, as said, the ford coilpack/edis system runs wasted spark.
- With cylinder 1 & 4 and 2 & 3 firing at the same time and sharing the same coil, there are only coild within the coil pack.
- This means that, unless its a internal wiring failure or similar if one cyl is down and the other not its a lead issue not a coilpack most
likely.
- It also means for routine purposes you it doesnt matter which way round 1 & 4 and 2 & 3 are plugged in.
I think ford also revised there suggested plug gap to prolong the life plug leads. Im sure thres more this elsewhere.
Daniel
[Edited on 2/5/2010 by dhutch]
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LBMEFM
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| posted on 3/5/10 at 06:19 AM |
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Given the weather you said you had could it be just moisture - try giving it a good soak in WD40
[Edited on 3/5/10 by LBMEFM]
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britishtrident
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| posted on 3/5/10 at 01:58 PM |
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ISTR Ford changed the specified plug gap because the excessively high HT voltage caused was breaking down the insulation of the coil pack and leads,
once the spark starts to jump the plug lead and coil pack are history.
I would go even further than Ford reduce the spark plug gap to 0.75 to 0.85mm --- this worked a treat on Rovers that were blowing coil packs.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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