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IanS last won the day on July 12

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About IanS

  • Birthday 04/05/1952

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    Ian Sumner

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Wheely good builder!

Wheely good builder! (4/5)



  1. CO2 should be a lot higher as the engine is burning hydrocarbon fuel ( petrol ) to CO2 and water. I think that you mean CO ( carbon monoxide ) which for carbed cars is either 3.5% or 4.5% depending on age. So even a fail here. Any Zero will probably new enough to not take advantage of visual smoke test only exemption for amature build vehicals. Is the temperature sender reading correctly as if the ECU thinks that the engine is cold it could be deliberatly over fueling.
  2. Vacuum guage is only a help with driving economically. At constant speed (obaing the speed limits) the throttle will be mostly closed restricting airflow to limit power this creats a vacuum in the inlet manifold. Pedal to the metal (I presume that give it some beans is the same) and the throttle is opened so there is no restriction in the airflow and more power as more air and petrol goes through the engine and there is no vacuum is the inlet manifold so your reading is normal. The DGV 32/36 has both a power valve and an accelerator pump that work in combination to overcome the lag in petrol flow that naturally happens in a carb when the throttle is suddenly opened. You can check the accelerator pump operation by removing the air filter and looking into the inlet of the carb when the accelerator is pressed, you should see a squirt of petrol into the choke of the carb.
  3. My dipstick also has that sensor. As far as I can tell it is a small heater and a bimetalic switch. The oil keeps it cool, no oil and the switch opens and a light goes on in the dash. I never wired it into my home made loom but still use the dipstick which goes almost vertically into the sump near the starter.
  4. IanS

    Fuel line

    At least with a metal line you are not going to have problems with E5 E10 E20 ..... E100 petrol eating it.
  5. 13.6 is good, higher risks overchargeing reduceing battery life.
  6. One thing to understand is that most alternators do not give a constant voltage out. At initial startup when cold they have a higher voltage to get the starting charge back into the battery. Depending on pully sizes it might not be roataing fast enough to charge at tickover when hot. Back in the days when cars were fitted with dynamos it was normal for no charge at tickover. Dynamos have a longer shaft than alternators due to the presence of the comutator. This means that for a given electrical output you can spin an alternator faster by fitting a smaller pully.
  7. IanS

    Pinto questions

    From what you say I understand that you are not the builder. Before you took the car off the road how did it run? My car has a nearly standard 2l pinto and can easily exceed uk speed limits, so something is wrong. I doubt that rolling road is the first option. New plugs got you through MOT so first thoughts are fueling and dirt/rust in the carb. Mot only tests engine under no load. Try new petrol to see if it improves things. Replace fuel filter if fitted. Then it is strip down and clean carb and check that float chamber level is correct and clear any deposits in the carb. Good luck
  8. IanS

    fuel lines and wiring

    The way I look at it is that electrics and fuel come together naturally at the fuel tank in the fuel level sender and fuel outlet (and return if fitted) as well as the intank electric fuel pump on most modern cars. Also they come together at the injectors on fuel injected engines. So I cannot see why they cannot cross at other locations provided that they are properly supported.
  9. You could try a bleed resistor from the tach input to earth. I would try 1K 0.25W.
  10. A very nice place, I envy you. But keep up expanding.
  11. Location:Near Salisbury Wiltshire Cornwall is expanding, it is undercover annexation, soon Cornwall will take over the whole of UK.
  12. I have sent a message. Ian
  13. IanS

    Earth improvement

    Starter connects back through its mounting bolts. I saw the words powder coat and first thought is that the bolts are not connecting in any real way. Run a tap down the threaded holes to remove powder coat in the threads.
  14. Realy does sound like pos earth alternator. not that I know of any, in the 1960s some cars were positive earth for early germanium transistor radios but I think that they were all dynamo. When you read alternator volts what polarity do you get? do you get the same volts on ACvolts as DCvolts? It is a new alternator so most probably duff.
  15. Does this change when the engine/gearbox is cold? You do not say if there are any new noises. 2 first thoughts, First engine to gearbox mounting (bell housing) bolts loose either at the engine end or the gearbox end, look for gaps. second the clutch is not releasing, could be partially melted clutch cable.
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