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davelaplante
New User
Feb 14, 2014, 5:39 PM
Post #1 of 2
(1092 views)
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1993 Chevy Cavalier 2.2.
Car starts and runs for about 15 mintues then shuts down for awhile. replaced fuel filter and check fuel pump to see if working. Don't know how to check fuel pump perasure. tested coils and seem alright. car started and ran for 45 minutes shut car off tried to restart later in day and car will start for about a minute and then shuts down and won't restart for hour. tried pumping pedal and checked spark plug was not wet.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 14, 2014, 5:48 PM
Post #2 of 2
(1087 views)
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Re: car won't start
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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.
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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