cold start problems

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  #1  
Old 12-15-07, 10:35 AM
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cold start problems

I have a 97 explorer when I start it. it starts running from high idle to almost killing and does this until it worms up.Also when I put the defrost on the air compressor keeps kicking in and out. thanks Ken
 
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Old 12-15-07, 01:41 PM
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Car with A/C all have the compressor running when the defroster is on.
 
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Old 12-16-07, 11:34 AM
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Originally Posted by gbpack1950 View Post
I have a 97 explorer when I start it. it starts running from high idle to almost killing and does this until it worms up.Also when I put the defrost on the air compressor keeps kicking in and out. thanks Ken
The engine surging up and down at idle is usually a sign of a vacuum leak. You didn't say which engine you have but if it is a 4.0L SOHC, upper intake gaskets are very common on those. If it is a 4.0L OHV the o-ring on the EGR tube is very common. Both can be easily checked, start the veh cold, and spray the areas mentioned with carb cleaner/choke spray. If the idle comes up and the veh runs normal, you have found the problem.
 
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Old 12-16-07, 11:39 AM
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Originally Posted by easywind View Post
Car with A/C all have the compressor running when the defroster is on.
the compressor keeps kicking in and out like every minute
 
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Old 12-16-07, 11:40 AM
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Originally Posted by gbpack1950 View Post
the compressor keeps kicking in and out like every minute
It's probably low on refrigerant
 
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Old 12-16-07, 03:28 PM
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If the vacuum leak areas check out, the idle may just be the fast idle for a cold engine, and the dieing down is from a bad water temp sensor.

I had about the same problem with my Ranger and a 2.9. It did OK when the weather was down in the single digits to teens, but anything above that I would get the normal fast idle, then the engine would either die or slow down and surge until it was warmed up. I replaced the water temp sensor for the computer and it been fine ever since.

Hope this helps,

Bob
 
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Old 12-18-07, 06:58 AM
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Thanks for the info I'll check it out. Mine seems to be doing it when the weather gets colder!
 
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