The Doc
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| posted on 23/5/10 at 11:36 AM |
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XFow Misfiring
Hi,
Ford Xflow. Runs fine until hot (about 10 mins of driving) Then 'lumpy'. Doesn't appear to be overheating. Not especially smokey
New points (checked setting)
New coil
New condensor
Timing is good
Cleaned out the carb/jets
Any suggestions?
TA
Mike
Q: Who wants to live until they're 80?
A: Someone who's 79
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thunderace
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| posted on 23/5/10 at 11:47 AM |
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try new leads?
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DRC INDY 7
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| posted on 23/5/10 at 12:09 PM |
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try a set of spark plugs if not new ones
https://www.facebook.com/groups/462610273778799/
Puddle Dodgers Club
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nitram38
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| posted on 23/5/10 at 12:26 PM |
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What coil are you using?
Make sure that you have not used one that requires a ballast resistor after starting the car, otherwise 12v will cook the coil.
You can usually check to see how hot it gets
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adithorp
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| posted on 23/5/10 at 02:48 PM |
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From the description check your valve clearences.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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britishtrident
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| posted on 23/5/10 at 03:15 PM |
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Fuel tank vent ?
[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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rusty nuts
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| posted on 23/5/10 at 06:08 PM |
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Check the basics first starting with the valve clearances. Does it miss when at idle or when driving? Found that lagging the exhaust manifold helped
with my cross flow engined car, also reduces the underbonnet temperature
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fatbaldbloke
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| posted on 23/5/10 at 07:55 PM |
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First thing, invest a couple of quid and change the rotor arm. It's a common fault on the crossflow for the rotor arm to develop microcracks
that open with temperature and leak the spark to earth.
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The Doc
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| posted on 23/5/10 at 07:58 PM |
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Tried all the above other than the valve clearences.
Happens at high revs and on acceleration and generally not at all until hot. In fact it runs really very well for about 10 mins
I have to say that coil does get hot. Could it simply be too close to the engine?
BTW, have double checked; it's definitely a 12V coil
Mike
Q: Who wants to live until they're 80?
A: Someone who's 79
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nitram38
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| posted on 23/5/10 at 09:42 PM |
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If you are checking the valve clearances, make sure the rocker arms aren't pitted on the face that meets the valve, otherwise when you insert
the feeler gauge you will not get the correct adjustment.
It they are pitted, flaten them off and do the adjustment again
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Nash
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| posted on 23/5/10 at 10:50 PM |
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Mike,
What carb are you running? I had a problem with the car going onto 3 pots. It was carb problems. Mine runs a twin choke webber.
........Neil
It's What You Do Next That Counts.
Build It, Buy It, Drive It:
Southern Kit Car Club
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