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1993 Buick Century starting and running problems
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Craziebon
New User
Apr 4, 2017, 2:44 PM
Post #1 of 2
(1546 views)
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1993 Buick Century starting and running problems
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My 93 Century was shutting down every once in a while and sometimes wouldn't start again for about 1/2 hour then it became worse, not starting for days and then all of a sudden it would. Was told it was the harmonic balancer sensor. Changed it and put new one in and now it hasn't started even though I put the sensor in, tried to check with a code reader but figure it all got erased when I disconnected the battery. Am wondering what it could be now? It ran fine otherwise, no misses or anything. Thanks for any and all answers. Am frustrated!
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 4, 2017, 5:23 PM
Post #2 of 2
(1537 views)
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Re: 1993 Buick Century starting and running problems
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All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
4) If all of these things check good, then you would need to do a complete compression test.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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