MK1 fueling issues?

Engine Oily Bits, Ignition, Fuelling, Cooling, Exhaust, etc.
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Alec
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Re: MK1 fueling issues?

#11 Post by Alec » Sat Feb 03, 2018 9:18 am

Hello SAh,

the plugs are wet, so it is not a fuelling issue. As Cliff says the likely cause is timing for whatever reason.

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TedTaylor
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Re: MK1 fueling issues?

#12 Post by TedTaylor » Sat Feb 03, 2018 11:46 am

Dave B wrote:
Thu Feb 01, 2018 1:46 pm
Clifford Pope wrote:
Thu Feb 01, 2018 9:21 am
All modern ones are useless, you just need to carry several spares.

Or just fit & forget electrnic ignition. I can only speak as I find. :|
And I found mine went t*ts up at a most awkward moment - towing the caravan to a Triumph event. The only breakdown that meant a recovery that Woodie has had.

Many others have had a similar problem so many advise carrying a spare points set up just in case - I hadn't, relying upon the good quality one a previous owner had fitted. :?

While the better quality (i.e. more expensive) electronic gizmos can be good they are not a 'cure all' especially if the distributor has seen better days and this is causing the problem. It was not the problem in my case - just failed electronics.

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sahtuning2000
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Re: MK1 fueling issues?

#13 Post by sahtuning2000 » Sat Feb 03, 2018 12:11 pm

The plugs are getting wet,he has looked,so that's a start,he has mentioned banging and popping which does sound like timing issues,but I would of thought he would of been OK with a new dizzy which would eliminate any points/condenser issues,but it still won,t start,i wonder if it had an issue with the original setup and the new dizzy isn,t installed correctly?

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Re: MK1 fueling issues?

#14 Post by sahtuning2000 » Sat Feb 03, 2018 12:28 pm

Just spoke to him and he said he checked the diaphrams and refitted the air filters but it still won,t start,he now has a very bad fear that the timing chain has either jumped or broken....
He thinks he can hear to rubbing on the cover when he turns it over by hand,so what is the situation there?i,am not sure he is correct,the rotor is turning and the valves are opening/closing,he said he can see an open valve when he removes number 1 plug,any thoughts before he starts to dismattle the engine for no reason!!!!

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Re: MK1 fueling issues?

#15 Post by Alec » Sat Feb 03, 2018 12:46 pm

Hello SAH,

that assumption in your post 13 seems likely.

The timing chain is still intact if the valves are opening and the drive to the distributor is also OK. Difficult to assess the rubbing though? There is a tensioner inside the timing cover but I wouldn't have thought you will hera the chain rubbing on that.

Back to basics, number one cylinder on compression (Valves 11 and 12 rocking) and set the crankshaft to 5 to 10 degrees before TDC, be pointing to the number one cylinder post on the distributor cap and the trigger on the distributor rotor shaft should be opposite the sensor (Or if still points the points about to or just open.). If those are incorrect thenm that is the problem. The common mistake is to fit the distributor 180 degrees out, i.e instead of number one firing with the engine as described earlier, it is firing number six

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Clifford Pope
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Re: MK1 fueling issues?

#16 Post by Clifford Pope » Sat Feb 03, 2018 12:52 pm

Take the plugs out, stick your finger into number one plug hole, and turn the crank slowly by hand as the timing marks approach the pointer. You can feel the compression so you know you have got the right half of the cycle. Then stick a bit of long stiff wire down the hole so it pivots on the edge of the threads, and as you move the piston up and down the free end of the wire will give an accurate indication of actual TDC.

Then check that the rotor arm is pointing to the HT lead that goes to No. 1 plug. Check the sequence of the other 5.
If you have points this is where you can move the crank to the 8 degree BTDC position and check that the points are just opening. If you have electronic ignition then with the ignition on you can judge that firing moment by listening carefully for the spark noise, or putting the cap back on and watching the plug on the loose no. one lead resting on the block.

If all that is all correct, then you know that the timing chain hasn't jumped and that the distributor is on correctly and the spark is occuring at the right moment.

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Re: MK1 fueling issues?

#17 Post by johnnydog » Tue Feb 06, 2018 10:53 am

Dave,
Earlier in his thread you said it would start and run for 2 - 3 minutes and then splutter and stop. But I take it now it won't start at all? That indicates to me that one of the components (or adjustments) that you have made is the cause of it now not starting. I think you need to start changing components or the adjustments back one by one, either using the original on the car ( at least it would start with them), or new, and once it fires again, then it may give you a clearer indication of the area you need to be checking more thoroughly.
You say the plugs are wet - a Triumph will struggle to start with wet plugs even if everything else is ok. They need to be virtually dry when you do your tests.
Some electronic ignition kit specify that the plug gap is widened considerably, but if you have gone back to points then it needs to be back at 25 thou. Although won't prevent it from starting, it will give a stronger spark to help it to.
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Re: MK1 fueling issues?

#18 Post by johnnydog » Wed Feb 21, 2018 9:28 pm

Have you or your Dad got any further with the Mk1 Dave?
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1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
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1973 Mk2 2.5 PI in Sienna Brown
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