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2000 marquis dies when gets hot
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gecallin
New User
Feb 4, 2012, 5:37 PM
Post #1 of 3
(1478 views)
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2000 marquis dies when gets hot
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2000 mercury grand marquis 4.6 v8, 65000 mls. Car dies when it reaches normal operating temp. will not start back until it cools off for say ten minutes or so. replaced crank position sensor and no luck.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 4, 2012, 5:43 PM
Post #2 of 3
(1472 views)
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Re: 2000 marquis dies when gets hot
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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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gecallin
New User
Feb 4, 2012, 5:53 PM
Post #3 of 3
(1466 views)
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Re: 2000 marquis dies when gets hot
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got the engine to op temp for said problem to occur, it died, sprayed cold spray on the crank sensor, and it fired right up. just frustrating now that i thought i had it solved. thanks for the advice
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