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90 olds van won't start all the time
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duanereynolds
New User
Jul 4, 2011, 12:09 AM
Post #1 of 2
(1767 views)
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90 olds van won't start all the time
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I have an old sillotte van that started giving me trouble starting.It runs fine for awhile no noise or hesitation or rough idling when i turn it off sometimes it won't start.I have taken some starter fluid and sprayed into the carb. still wont start so i think it may be spark?? I replaced distibutor cap and rotor and it started right up, but turning it off was doom, because it now won't start!!!!! The van runs great most of the time but this problem has made it unreliable what gets me is it starts after sitting awhile sometimes 30 min. sometimes over night please help if you have ideas
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 4, 2011, 5:13 AM
Post #2 of 2
(1760 views)
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Re: 90 olds van won't start all the time
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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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