Series 2 Miss at high speed 2.25 petrol:

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mrchurchill109

mrchurchill109

Active Member
Posts
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Location
Northeast US
My yard is starting to look like BL in the 60s...lots of annoying Land-Rovers.

My 1964 Series IIA 109 is acting up was running perfectly and has suddenly developed a high-speed miss. Once the truck warms for 5-10 minutes, pushing the revs results in a miss/stumbling. When it first happened I thought it might have been a fuel issue, but further driving has had me discount that - it's definitely electrical.

I'm figuring it's either the coil or the coil wire, as it's definitely not rhythmic as it would be on a particular plug. Got a set of wires, cap and rotor on order and will sewap those (electronic ignition so no points/condenser).

Anyone got any frther ideas or anything I'm just missing (pun intended)?

Alan
 
What plugs and leads have you got? some leads have resistance built in and some plugs have them built in too...both together can be troublesome. Also worth checking the points gap. Does it change with the throttle - it may be over or under fueling at WOT due to a blocked main jet or air jet.
 
chris7 said:
Had an inconsistent miss when I first got my petrol 2 1/4 swb series 3 and it turned out to be a cracked exhaust valve! Regards Chris
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Bite Your Tongue! :)

Honestly, I don't think that's the case here. The skip is not consistent to one cylinder, which is what makes me suspicious of the cabling as a first question. Leads on this car are over a decade old and likely getting elderly in any case. A set of plugs prob'ly wouldn't go astray either - good call Tottot.

I have a couple of gen-you-wine Lucas Sport coils on the shelf - if the tune-up bits don't resolve it that will be next on the list.

Plugs and leads are appropriate to each other, and no points or condenser Dominic - he's got an Aldon Ignitor. i did order up a set of points and a condenser in case I need them to determine fault - i can use them on my 54 Series I (with a 2.25) as spares anyway so no loss.
 
Duff HT lead breaking down, coil breaking down, play in the rotor shaft, condenser breaking down. If changing the condenser coil and leads doesn't help I'd go for broke and fit an electric dizzy or an electric sparks kit if your dizzy is in good nick.
 
next time this happens go and feel the coil. if it's hot, smack it and see what happens. it also shouldn't get really hot.

did yopu change the coil the same time as the leccy ign.. as i thought that was recommended.. also when did you stick the leccy in?
 
trax said:
did you change the coil the same time as the leccy ign.. as i thought that was recommended.. also when did you stick the leccy in?
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The whole works is over a decade old and has done many, many thousands of miles - none of it is anywhere new barring cap and rotor and plugs replacements over time (none recently). Thanks for the suggestions re:condenser and the like but it ain' got one... :)

I'm just going to give the old sod a tune-up and see what happens. The cap, rotor and leads will be in the post today, and a 5-minute stop on the way home will get me a set of spark plugs.
 
mrchurchill109 said:
The whole works is over a decade old and has done many, many thousands of miles - none of it is anywhere new barring cap and rotor and plugs replacements over time (none recently). Thanks for the suggestions re:condenser and the like but it ain' got one... :)

I'm just going to give the old sod a tune-up and see what happens. The cap, rotor and leads will be in the post today, and a 5-minute stop on the way home will get me a set of spark plugs.
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i said ignition coil :)
 
wattfield said:
There's definitely something amiss if you can get high speed out of a 2.25.
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Speak for yourself, mate - it happily gets down the motorway at 65-70 all day. Take THAT, jeep CJ5s! :)

I have to say on that point - most people who've complained that "X engine is a dog" in Land-Rovers have never had a good one. There are exceptions, the K-series in the Freeloader and the 2.25 Diesel (ick!)) but with most Landies these engines will run happily on long after they should have been overhauled - and newish owners assume they're supposed to be oil-guzzling gutless wonders.
 
mrchurchill109 said:
Re: I said coil:

Wasn't directed to you... :) I agree, it could well be the coil and I have a spare i will try if the tune-up and leads don't do it.
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doh, it wasn't was it! mumble mumble silly me

changed my mates 2.25p to leccy ign a year or two ago.. transformed it. it must have been so badly setup.
it then started dieing when hot.. after mucking about for far too long, it turned out just to be the spark plug gaps :eek:
 
mrchurchill109 said:
Speak for yourself, mate - it happily gets down the motorway at 65-70 all day. Take THAT, jeep CJ5s! :)

I have to say on that point - most people who've complained that "X engine is a dog" in Land-Rovers have never had a good one. There are exceptions, the K-series in the Freeloader and the 2.25 Diesel (ick!)) but with most Landies these engines will run happily on long after they should have been overhauled - and newish owners assume they're supposed to be oil-guzzling gutless wonders.
Click to expand...

It was a joke, I've had a 2 1/4 myself. Still, it's no Ferrari! ;):D
 
Sometimes you just have to shotgun a problem...it's easier.

I did a full tune-up on the 109 last evening - cap (worn) rotor (ditto) wires (over a decade old) and sparkplugs (not bad at all but swapped anyway).

While I was at it I swapped the coil - figured it was worth it just to see and I could swap the old one back in later to determine its condition.

This definitely got rid of the high-speed miss. However, the performance of the truck as compared to previous is a bit...flat. Where i would put my foot down in 4th OD and get a definite acceleration now it just kinds of wallows, and if held on at that point it starts to shudder like the power is not constant.

I'm wondering if I have another problem, or if the coil I swapped in is perhaps not giving the spark I got from the other one and I'm getting less complete combustion. The wires I got from my supplier were not the highest quality - also wondering if that might be part of the issue.

It's not horrid - I drove it to work this morning - but it is definitely off its peak.

Opinions?
 
mrchurchill109 said:
Sometimes you just have to shotgun a problem...it's easier.

I did a full tune-up on the 109 last evening - cap (worn) rotor (ditto) wires (over a decade old) and sparkplugs (not bad at all but swapped anyway).

While I was at it I swapped the coil - figured it was worth it just to see and I could swap the old one back in later to determine its condition.

This definitely got rid of the high-speed miss. However, the performance of the truck as compared to previous is a bit...flat. Where i would put my foot down in 4th OD and get a definite acceleration now it just kinds of wallows, and if held on at that point it starts to shudder like the power is not constant.

I'm wondering if I have another problem, or if the coil I swapped in is perhaps not giving the spark I got from the other one and I'm getting less complete combustion. The wires I got from my supplier were not the highest quality - also wondering if that might be part of the issue.

It's not horrid - I drove it to work this morning - but it is definitely off its peak.

Opinions?
Click to expand...
Well, the old wisdom said, replace one thing at a time and test that. (Not meaning to be unhelpful)
 
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