| [ Total Views: 773 | Total Replies: 13 | Thread Id: 67042 ] |
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 1916baja
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| posted on January 16th, 2008 at 07:19 PM |
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Missing under load
I have a 1916 with a mild cam, standard heads, solid rocker shafts, heavy valve springs and twin 40 idf webbers. I am finding recently it is missing
and back firing at mid to high revs when it is under load especially after idleing for a bit, sometimes to the point where it is not drivable. Also i
don't know if it's related but i am finding my Passenger side J pipe is getting much hotter than the other? Not even hot enough to burn the wd 40 i
am spraying on the webber manifolds to check for air leaks. Any thoughts?
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VWCOOL
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| posted on January 16th, 2008 at 08:20 PM |
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Have you checked all the basics - points gap, timing? Missing is usually ignition, often a condensor or old plugs that 'throw in the towel' when
asked to work harder than idle the engine
Pay your debts, CxxT
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 Bizarre
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| posted on January 16th, 2008 at 08:34 PM |
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What colour are the plugs??
Have you checked all jets for blockages??
What condition is the coil. When they get old they can do what you describe
Futue te ipsum!!!
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1916baja
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| posted on January 16th, 2008 at 09:21 PM |
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Coil and blockages are the only things i haven't checked. I thought the carbies may have been out of balance because of the J pipe thing, a leak in
the balance pipe?? but i checked that and it's all good. I actually didn't have any hose clamps on part of the balance pipe but i fixed it and it's
still the same. After the new spark plugs it ran great for about a 2 hrs. I'll check what colour but they have never given me problems before, i have
been driving the car for about 6 months. Would you think if it were blockages it would have cleared out by now? it's ok on the highway. Is there any
way to test the coil? or just put another one in and hope for the best?
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Bizarre
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| posted on January 17th, 2008 at 09:42 AM |
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You can look at the colour of the spark
It needs to be "BRIGHT" - white/blue
If it is orange/yellow it is shot.
For $40 i would put a new one in anyway and rule it out.
Same problem happened to me a couple of years ago.
Greg Ward found the problem .... coil breaking down under load.
Futue te ipsum!!!
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donn
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| posted on January 17th, 2008 at 12:24 PM |
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how hot should a coil get? should it be very hot to touch?
I dream of a day when a chicken can cross a road without being asked for it's motive!
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greedy53
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| posted on January 17th, 2008 at 04:37 PM |
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haqve you set the tappets could be a bit tight as for carbs just turn in the mixture screw count the turns than set both to the best one and change
plugs and points and condensor
i had a coil go on me once it was really bloddy hot than it started to miss and do the things that you r having if you can get a loner try that to
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1916baja
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| posted on January 18th, 2008 at 07:35 PM |
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Checked coil and the spark seems ok. It's a nice white/blue. But i did notice when i was ckecking the spark, at revs the spark was missing every now
and then. Could it still be a coil problem even though the colour of the spark is ok?
Condenser is new, rotor button is new, points are new, spark plugs are new, Tappets were reset before christmas, They sound ok. no different than
before.
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Bizarre
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| posted on January 19th, 2008 at 07:02 AM |
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cant you beg / borrow / steal one??
Futue te ipsum!!!
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1916baja
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| posted on January 19th, 2008 at 10:03 AM |
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Yeah i can get one, But i couldn't yesterday because my parteners car was broken too! we had no way of getting anywhere so i had to fix one of them
and i knew what was wrong with the hyundai. I should look under the house, i probably have one.
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rufbug
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| posted on January 19th, 2008 at 06:20 PM |
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i had all these probs on my 2276cc
i ended cleaning out the carbs and getting the jetting right and buying a u beaut compufire dis x ignition, now running like a charm.
what jetting do you have in the idf's, there could be a prob there too
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1916baja
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| posted on January 21st, 2008 at 08:49 AM |
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The jetting was all done by vw & volvo centre and it has been ok till now. i'm hopefully gonna try a new coil today.
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Craig Torrens
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| posted on January 21st, 2008 at 08:56 AM |
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coil, coil, coil !!
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1916baja
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| posted on January 22nd, 2008 at 07:31 PM |
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Checked coil and it's not the problem. I think the problem might be no1 cylinder. when i pull the lead off it doesn't run rough like it should. I
dont have another lead to test it. i will get one tomorrow and try it.
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