For long tome forum folks, thanks for the years of advice and help. Happily, I finally got my A4 running great, two days ago. The surging issue resolved itself, magically, and the engine was running perfectly. Two days ago. Today, after repairing the genoa went down, put the sail back up and went to start the engine. A little cranky but it started and was idling at the slip just fine. Started casting off lines and poof, engine just went dead, just like I had turned it off. Trying to restart met with zero success, even with ether, nothing, so I am thinking ignition, not fuel. Checked spark at plugs and it seemed weak, checked spark from coil wire and altho a bit stronger still seemed weak. Tried cleaning and resetting the coil wire, nothing. The engine makes zero effort to start. The coil is virtually brand new after replacing late last year (thanks for the advice on that). Electronic ignition. New carb, fuel line, and tank (the root cause of many problems, a totally rusted tank). This is just infuriating, the engine was running better than it ever had just 2 days ago. Appreciate your thoughts.
engine idling fine then shut off like turning key off, will not restart
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I am presently working through the exact same issue! My A4 now starts perfectly every time, however, will stop after a short time....and I too have done all the stuff that you outline...new filters, draining the carb, new plugs, new coil. My next step is to dismantle and clean the carb completely. However, in your case, if you have an electric fuel pump, the oil pressure switch could be bad....which prevents the pump from delivering fuel! Make up a short jumper wire, and bypass the switch.....if it starts and runs, you have found the problem...Good luck!Last edited by quiesence65; 08-08-2018, 07:32 AM.
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All the times my engine died at idle happen to have been due to a closed fuel valve (several ¡a-ha! moments resulted). Assuming that’s not The situation here, there’s no harm in taking five minutes to remove the cap and making sure the rotor is intact, positioned properly, and that the contacts are cleaned. Does your new fuel system have both spin and polishing filters in place, and has the fuel been stabilized? (If not, your nice new carb could be gummed up already.) Are you sure your OPSS is connected, or bypassed for this situation, and do you have fuel pressure (add the $20 inline gauge)? Is your coil of the proper resistance (helps if sourced from Moyer)?
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Originally posted by quiesence65 View PostI am presently working through the exact same issue! My A4 now starts perfectly every time, however, will stop after a short time....and I too have done all the stuff that you outline...new filters, draining the carb, new plugs, new coil. My next step is to dismantle and clean the carb completely. However, in your case, if you have an electric fuel pump, the oil pressure switch could be bad....which prevents the pump from delivering fuel! Make up a short jumper wire, and bypass the switch.....if it starts and runs, you have found the problem...Good luck!
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Originally posted by tenders View PostAll the times my engine died at idle happen to have been due to a closed fuel valve (several ¡a-ha! moments resulted). Assuming that’s not The situation here, there’s no harm in taking five minutes to remove the cap and making sure the rotor is intact, positioned properly, and that the contacts are cleaned. Does your new fuel system have both spin and polishing filters in place, and has the fuel been stabilized? (If not, your nice new carb could be gummed up already.) Are you sure your OPSS is connected, or bypassed for this situation, and do you have fuel pressure (add the $20 inline gauge)? Is your coil of the proper resistance (helps if sourced from Moyer)?
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Originally posted by quiesence65 View PostI am presently working through the exact same issue! My A4 now starts perfectly every time, however, will stop after a short time....and I too have done all the stuff that you outline...new filters, draining the carb, new plugs, new coil. My next step is to dismantle and clean the carb completely. However, in your case, if you have an electric fuel pump, the oil pressure switch could be bad....which prevents the pump from delivering fuel! Make up a short jumper wire, and bypass the switch.....if it starts and runs, you have found the problem...Good luck!
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Originally posted by tenders View PostAll the times my engine died at idle happen to have been due to a closed fuel valve (several ¡a-ha! moments resulted). Assuming that’s not The situation here, there’s no harm in taking five minutes to remove the cap and making sure the rotor is intact, positioned properly, and that the contacts are cleaned. Does your new fuel system have both spin and polishing filters in place, and has the fuel been stabilized? (If not, your nice new carb could be gummed up already.) Are you sure your OPSS is connected, or bypassed for this situation, and do you have fuel pressure (add the $20 inline gauge)? Is your coil of the proper resistance (helps if sourced from Moyer)?
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