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no start when extreme cold
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mjb
New User
Jan 19, 2016, 9:31 AM
Post #1 of 4
(1100 views)
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no start when extreme cold
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2002 sable, will not start in below freezing temps. bring inside warm garage overnight, starts right up and all test are normal. replaced fuel pump, no help.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 19, 2016, 9:55 AM
Post #2 of 4
(1097 views)
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Re: no start when extreme cold
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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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kev2
Veteran
Jan 19, 2016, 2:57 PM
Post #3 of 4
(1085 views)
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Re: no start when extreme cold
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start easy simple-
Scan for codes yes even if CEL is off. Its free fast easy- Many auto part stores do it for free.
SWAG - ECT - engine temp sensor issue.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 19, 2016, 7:25 PM
Post #4 of 4
(1080 views)
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Re: no start when extreme cold
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Which engine? DOHC or OHV? Good suggestions so far.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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