The worst for me is getting into something and finding something wrong, then fixing that problem only to find another wrong, and then often finding still more problems as each of the others is fixed. If it's on a project where you can check to insure that what the breakdown the customer called about was fixed after each repaired problem, it's not so bad. What I hate is when you've got to get every problem corrected before trying the machine again, and, as you said, not having a clue which of the small problems was really causing the BIG one, or was it a combination of one or more of the little ones together doing it.
Went through similar today on the engine that runs the hydraulic system on my service truck. A while back I had a no start/no turnover issue with the starter so I had it gone through to insure I didn't have to go through the effort of moving everything in the bed and pulling the panels off the engine for another 10 years. At the time the starter checked good, and the 'slave' solenoid that sends power to the solenoid on the starter itself appeared to be bad. Shortly thereafter I began having a problem with it not starting when hot. This morning it wouldn't start cold so I knew it was starter time. Pulled the old one off and went to swap over the slave solenoid and the crimp on end fell off the wire running between it and the solenoid on the starter. So, that loose wire could have very well been my problem, BUT, it was still in the connector so it 'should' have been making contact. The hot cold deal usually turns out to be a bad spot in the starter windings that opens when hot and closes when cold.....but the starter still checks good...... I also discovered that the cable from the battery to the engine had been getting hot on the end where it attached to the battery.
In the end it got a new starter, a new wire between the solenoids, and a new, larger guage wire from the battery to the engine. Now when you hit the switch the engine practically runs away as fast as it turns. Never turned that fast, that I can remember, since day one.....and on day one the starter that I replaced today was brand new also. Which of the three things I did actually fixed the problem, I don't know. Will it still start when need to let it run for several hours and then shutdown and restart a little later, who knows.....What I do know is that at least one of the three things I did seems to have fixed the problem and given me great results that I really didn't plan for... YEAH !!!!!!!!!!!!!!!!!!!!!!
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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