mad4x4
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| posted on 30/12/11 at 03:55 PM |
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v8 always lumpy and missing
History :
Out one day and it started back firing and overheating - Suspected points
Goto home - wouldn't start
Changed points to electrical
new cap
new leads
new rotor
Now starts but runs on about 6 of the 8 cylinders. - Checked Leads
Check leads checked spark, checked plug gap, Checked leads .... etc etc
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Any one near Montrose that knows about v8's in a Big landrover 101, Basically a range rover v8 (carbed)
now willing to pay!
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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Wadders
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| posted on 30/12/11 at 04:18 PM |
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Maybe it's not ignition related, might be worth doing a compression check on all cylinders.
Al.
Originally posted by mad4x4
History :
Out one day and it started back firing and overheating - Suspected points
Goto home - wouldn't start
Changed points to electrical
new cap
new leads
new rotor
Now starts but runs on about 6 of the 8 cylinders. - Checked Leads
Check leads checked spark, checked plug gap, Checked leads .... etc etc
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Tried rotating dizzy.
Checked leads
Cheack plugs
checked spark
got pissed off had beer
Any one near Montrose that knows about v8's in a Big landrover 101, Basically a range rover v8 (carbed)
now willing to pay!
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neilp1
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| posted on 30/12/11 at 04:25 PM |
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I had a Rangie classic several years ago and mine was the same up until it eventualy wounldn't run. It would start then cut out. I changed
everything dizzy cap, rotor arm, ECU, air flow meter, plugs, leads coil. The list was endless.
It turned out to be a blocked flame trap which cost 5 quid odd and sorted it out.
Neil
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wilkingj
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| posted on 30/12/11 at 05:37 PM |
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3.5 or 3.9+ Litres, (and confirm its a Rover V8)
Check the compression on all 8 pots. Could be a blown head gasket. (common on the 3.9's and above)
weak sparks on the RV8 is always a problem, I changed mine to a Mallory electronic Dizzy.
Is it using water? Especially if a 3.9 or above.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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scudderfish
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| posted on 30/12/11 at 05:48 PM |
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Are you absolutely, positively sure you've definitely got all the spark leads connected to the right plugs? If you've got two swapped
it'll run like a dog on 6.
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v8kid
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| posted on 30/12/11 at 07:35 PM |
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Rotor arm on mine did this
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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mark chandler
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| posted on 30/12/11 at 07:57 PM |
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Rotor arm here as well, I had one that just stopped. You need a decent quality one !
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coyoteboy
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| posted on 31/12/11 at 10:54 AM |
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Faulty plug? I had an intermittent and progressively worse misfire on a 4 cyl which was worse when hot and worse on tip-in. It was a resistor plug
with a dodgy internal connection. Measure the resistance through the plugs from one end to the other (not to the ground/body) - it should be around
3-5Kohms (resistor) or less (non-resistor) if it's OK. This one was 9K and was breaking down on spark, later became 27K and was giving an almost
constant misfire other than at cruise.
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rusty nuts
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| posted on 31/12/11 at 12:11 PM |
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Worn cam shaft will cause all sorts of running problems on the Rover lump especially if exhaust lobes are worn. Try running the engine with one rocker
cover off at a time and check all valves are opening. Compressions can still be good although lower if an inlet lobe is worn,
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kipper
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| posted on 31/12/11 at 12:39 PM |
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I had a rover v8 many years ago and it ran rough all the time untill I stopped at a filling station for juice and the fitter who worked there was
serving the fuel (it was that long ago).
I moaned about the car as he was filling it up, he said wait there a mo, came out with an oil can and squirted some oil into the the SU dash pots!!!!
The car was transformed.
Can't say thats your trouble but worth a try
Happy new year.....Denis.
Where did that go?
<<<<
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NigeEss
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| posted on 31/12/11 at 01:39 PM |
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Have you changed plugs or just checked them ?
They often perform very differently when under load, as mentioned above resistor
plugs can fail. My ZX9r developed a misfire but all pugs fired fine when checked but
a new set cured the problem.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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mad4x4
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| posted on 31/12/11 at 02:19 PM |
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Landrover 101 - Rover v8 3.5 l on Carbs Original Military re-con. (pale blue)
Dizzy contents changes to "electronic kit" (powerspark)
Coil Changed
Leads Changed
Rotar Changed
Cap Changed
Link Bar on back of Carbs replaced
Not using water
Havn#t compression checked it - don't have gear to do that
Haven't changed plugs just re-set them all
Has never ran right since the day it started backing and missing. Before all the ignition bits were changed.
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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coozer
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| posted on 31/12/11 at 02:33 PM |
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Get a EDIS and 2 coil packs!
1972 V8 Jago
1980 Z750
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coyoteboy
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| posted on 1/1/12 at 05:39 PM |
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I'd urge you to at least check the plugs. i considered a complete replacement of all coils and leads on the aforementioned car as I felt the
plugs wouldn't be at fault. A £10 set of copper plugs later and the car was transformed from a misfiring nightmare back to its normal self.
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deltron63
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| posted on 1/1/12 at 06:01 PM |
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quote:
Originally posted by scudderfish
Are you absolutely, positively sure you've definitely got all the spark leads connected to the right plugs? If you've got two swapped
it'll run like a dog on 6.
+1
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deltron63
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| posted on 1/1/12 at 06:08 PM |
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quote:
Originally posted by coozer
Get a EDIS and 2 coil packs!
Like this
 
Description
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bertie_bas205
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| posted on 1/1/12 at 11:46 PM |
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Change the plugs first.
Start with the simple things first...
If yer not sure ask someone that does....
Which carbs have ye fitted to it??
If its Strombergs, throw them in the bin and fit SU's...
I would recommend fitting a genuine cap, theres alot of crap copies out there...
I had the same symptoms in my V8 trialler, changed the carbs and fitted Lumination..
Bertie.
P.s, I take it you've checked/changed the fuel filter??
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NigeEss
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| posted on 2/1/12 at 09:52 AM |
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quote:
Originally posted by mad4x4
Landrover 101 - Rover v8 3.5 l on Carbs Original Military re-con. (pale blue)
Dizzy contents changes to "electronic kit" (powerspark)
Coil Changed
Leads Changed
Rotar Changed
Cap Changed
Link Bar on back of Carbs replaced
Not using water
Havn#t compression checked it - don't have gear to do that
Haven't changed plugs just re-set them all
Has never ran right since the day it started backing and missing. Before all the ignition bits were changed.
With all other ignition bits working at best it your plugs are the weakest link, any deficencies with be exagerated.
Just because they look to fire properly when they're dangling on the leads doesn't mean they work as well in situ.
Just change them and if nothing else it eliminates another variable.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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