Petrol tank removal.

A7RXY · October 26, 2009, 06:40:49 PM

Thanks for your time David, but I\'m trying to find someone that knows carbs, and does not need a computer to tell him what to do.
At present there is no real change to the car with all the new bits added including the carb rebuild, when the engine is under load there is no real power.

Ian65 · October 26, 2009, 07:01:41 PM

Quote from: shaunwil;650406Still don\'t think its fueling. Still think you want to check the ignitors.Shaun

it could have lost an ignitor and be running trailing only which is breaking up at revs but I still reckon its the accellerator pump and the secondaries.

We should have a sweep to guess the problem!

To be fair, it could be anything and trying to diagnose the problem without the car is very difficult.

I\'ve bee there myself with a rotary that wouldn\'t run properly.... frustrating ain\'t the word!

shaunwil · October 26, 2009, 07:10:33 PM

Does sound like what mine did when the igniter died. Bogged down horribly and refused to rev pat 5.5k. Knew it wasn\'t the petrol pump, was on gas :Giggle

Shaun

A7RXY · October 26, 2009, 07:12:38 PM

All the plugs are sparking.............Just been talking to a guy who seems to know what he is talking about but as you would imagine can not take a look at it untill sometime in December....................................frustrating it sure is............

A7RXY · October 26, 2009, 07:16:05 PM

Shaun when you say igniter do you mean the coils, as both of those are ok.

David Nock (RIP) · October 26, 2009, 07:19:23 PM

The symptoms you describe Dibs seem to drop across all of the Carburetor functions at the same time; by that I mean Idle is affected (hunting), mid band power is affected (can\'t get on the trailer), and high speed revs are affected (can\'t get over 5500 revs). Since these functions are carried out by different mechanisms within the carb I\'m really doubting that the problem will be in there.
A failed ignitor is a new idea certainly worth following but if we are on a sweep then Bags I vacuum pipes to dizzy vac retard and inlet gasket/manifold system...unless I can\'t have both of these together.

David Nock (RIP) · October 26, 2009, 07:30:53 PM

Quote from: A7RXY;650408Thanks for your time David, but I\'m trying to find someone that knows carbs, and does not need a computer to tell him what to do.
At present there is no real change to the car with all the new bits added including the carb rebuild, when the engine is under load there is no real power.

You\'re too far from Haywood in Berkshire I take it?
Idea...Why not put a general post up on the club..\'Want a 1st gen specialist near Essex\'. A good few engine rebuilding specialists are on here and the old timers should be able to help if you can get the car to them. Then there\'s some on the other site but they\'re perhaps further away still.

A7RXY · October 26, 2009, 07:36:33 PM

I have now been through the w/s manual and found the igniters, if they are not to expensive I will order new ones.........

Ian65 · October 26, 2009, 07:52:46 PM

Quote from: A7RXY;650438Shaun when you say igniter do you mean the coils, as both of those are ok.

I see you\'ve found them now in the manual.
They are simple plug in modules screwed to each side of the dizzy.

I seem to remember that they were quite pricey last time I bought some ( about 15 yrs ago)

There are plenty of people breaking running cars due to body rot at the moment. It may be worth getting a price fro some 2nd hand ones off a known runner if new prove too costly.

It\'s about a 2 minute job to swap them.

myatt1972 · October 26, 2009, 08:08:32 PM

Quote from: A7RXY;650295Right this morning I tried Ians idear, running from a can striaght to the pump, no change, so no longer going to remove the tank.
I was running it this morning from both the tank and can and it was reving up to 6000 and then dying sometimes could catch it and keep it running other times it would conk out. Took the air filter off and two pots of the carb closest to the wing were full of fuel, and the other two were misting, thats when I felt I was getting in to deep so came on here....................help.......

Ps when it was running when warm on tick over it seemed to be running ok, but as soon as I hit the gas pedal it wanted to die.

When you say the secondaries are full of fuel do you mean its got pools of fuel in there because the only way that could happen is if the secondaries were staying shut, hence the symptoms. Standard secondaries are vacuum operated and if you rev the car while looking down the carb you should see them open, use a mirror in case you get a backfire. I have converted my secondaries to manual operation, very easy with a bit of wire around the linkage.
If you want to try igniters ive got some you can have and I also have a complete carb if you wanted swap over to test.

A7RXY · October 26, 2009, 08:08:32 PM

Thanks Ian, do you have photos at hand or did you take those for me, if so respect...............

Ian65 · October 26, 2009, 08:13:44 PM

just nipped out into the garage!

A7RXY · October 26, 2009, 08:20:35 PM

Quote from: myatt1972;650465When you say the secondaries are full of fuel do you mean its got pools of fuel in there because the only way that could happen is if the secondaries were staying shut, hence the symptoms. Standard secondaries are vacuum operated and if you rev the car while looking down the carb you should see them open, use a mirror in case you get a backfire. I have converted my secondaries to manual operation, very easy with a bit of wire around the linkage.
If you want to try igniters ive got some you can have and I also have a complete carb if you wanted swap over to test.

Are the secondaries the ones nearest to the wing if so they did have pools of petrol in them, they were dry when I took the air cleaner off, but after running the car and turning the igintion off I noticed they were say half full and there appeared to be petrol trickling in.
As for the igniters I will chk the price tomorrow, just a thought I have sparks at all the plugs, if one of the igniters was down would this still happen.....

Ian65 · October 26, 2009, 08:23:35 PM

Quote from: myatt1972;650465When you say the secondaries are full of fuel do you mean its got pools of fuel in there because the only way that could happen is if the secondaries were staying shut, hence the symptoms. Standard secondaries are vacuum operated and if you rev the car while looking down the carb you should see them open, use a mirror in case you get a backfire. I have converted my secondaries to manual operation, very easy with a bit of wire around the linkage.
If you want to try igniters ive got some you can have and I also have a complete carb if you wanted swap over to test.

That\'s a good point.
If you can do a temporary manual operation for your secondaries ( wire or zip tie the linkage as Keith says, so that the secondaries open with the primaries), you will then be certain that they are opening.
The engine may flat spot slightly but should rev up to the redline, no problem. ( unless theres another problem of course)

There are plenty of threads on how to do this on the net.

I\'d definitely try this before spending any more money on it.

myatt1972 · October 26, 2009, 08:33:39 PM

Secondaries are nearist to the wing and if you have fuel trickling in without the engine running something is wrong. If you have good strong sparks at the plugs I would think the igniters are ok.
Keith..