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yahoo
New User
Nov 8, 2011, 7:04 PM
Post #1 of 7
(2769 views)
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98 Grand Prix no spark
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Was driving car on friday and turned it off for the night. Went out saturday morning and car would not start. I can hear the fuel pump and can smell gas after a couple tries tring to start car. I checked fuses, relays, and power to fuse block and all ok.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 8, 2011, 7:08 PM
Post #2 of 7
(2764 views)
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Re: 98 Grand Prix no spark
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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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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 8, 2011, 7:09 PM
Post #3 of 7
(2761 views)
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Re: 98 Grand Prix no spark
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3.1L or 3.8L? Any codes stored in the engine controller?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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yahoo
New User
Nov 27, 2011, 7:48 PM
Post #4 of 7
(2699 views)
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Re: 98 Grand Prix no spark
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After checking the codes it turned out to be the crank censor. Thanks for the help.
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Mr.scotty
Enthusiast
Nov 27, 2011, 11:00 PM
Post #5 of 7
(2691 views)
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Re: 98 Grand Prix no spark
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Glad to here, great job.
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Your only as good as your tools!
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thejudge
Novice
Jun 4, 2012, 6:22 AM
Post #6 of 7
(2306 views)
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Re: 98 Grand Prix no spark
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i'm having the same issue i dont have any codes showing. ENGINE LIGHT WAS ON for low coolant sensor. BUT i replaced it and the radiator which had a crack in it.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 4, 2012, 7:09 AM
Post #7 of 7
(2303 views)
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Re: 98 Grand Prix no spark
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Thread is more than a year and a half old! Please start you own with your own specifics.
This one locked,
Tom
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