| Electronics > Projects, Designs, and Technical Stuff |
| Improvised oscilloscope probe for Automotive ignition analysis. |
| << < (9/16) > >> |
| Edison:
--- Quote from: Jim-0000 on January 08, 2019, 12:18:39 pm ---So, we will have to find the problem some day soon, I figure. --- End quote --- Is the fault really in the electricity? Our racing car was a faulty fuel pump - idling OK, irregular running under load, random performance drop - replacing the fuel filter = improvements, replacement of pump = fault has been rectified :phew: |
| Jim-0000:
--- Quote from: Edison on January 08, 2019, 02:19:07 pm --- --- Quote from: Jim-0000 on January 08, 2019, 12:18:39 pm ---So, we will have to find the problem some day soon, I figure. --- End quote --- Is the fault really in the electricity? ...................................... --- End quote --- I am not at all sure and will not be until and if we put an oscilloscope on the engine plug leads etc. However, we think it is the electrical system. The observed behavior that supports this is: 1. The miss - fire is worst at idle and mid range steady RPM 2. When revved up hard, it disappears, or almost does so. My assumption is if the problem was lack of fuel, the above would be opposite. The two mechanics assure me that there is plenty of fuel pressure. I have asked that question enough times to exhaust their patience. Thanks for the tip though. There is a fuel pressure gauge somewhere on the car I think? I will look next time we are working on the car. Will not be doing so for a week or so. It is here next door to me, but all covered up with tarps etc. |
| Edison:
Checking the ignition is the first! Minus control - battery / chassis - chassis / engine Is the injection system fully electronic? Do you have? speed sensor, engine vibration sensor, air weight, lambda ..... Is the carburettor or ecotronic system? Hall probe in distributor, burned distributor cap, reading in chambers (diaphragms, hoses, pressure sensors) jets, float, leaky chambers ........ :-// there's a lot of it |
| Edison:
little out of far away :palm: I would have stopped :-DD |
| tautech:
--- Quote from: Jim-0000 on January 08, 2019, 10:15:05 pm --- --- Quote from: Edison on January 08, 2019, 02:19:07 pm --- --- Quote from: Jim-0000 on January 08, 2019, 12:18:39 pm ---So, we will have to find the problem some day soon, I figure. --- End quote --- Is the fault really in the electricity? ...................................... --- End quote --- I am not at all sure and will not be until and if we put an oscilloscope on the engine plug leads etc. However, we think it is the electrical system. The observed behavior that supports this is: 1. The miss - fire is worst at idle and mid range steady RPM 2. When revved up hard, it disappears, or almost does so. My assumption is if the problem was lack of fuel, the above would be opposite. The two mechanics assure me that there is plenty of fuel pressure. I have asked that question enough times to exhaust their patience. Thanks for the tip though. There is a fuel pressure gauge somewhere on the car I think? I will look next time we are working on the car. Will not be doing so for a week or so. It is here next door to me, but all covered up with tarps etc. --- End quote --- Check all the A/R system.....hoses, fittings, points plate free, flyweights and springs OK and sometimes old dizzy shafts need rebushing so that points gaps and dwell angles remain consistent throughout the rev range. |
| Navigation |
| Message Index |
| Next page |
| Previous page |