D90 cold start problems - Defender Source
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  #1  
Old November 18th, 2012, 06:46 PM
aquamanaquaman
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Mark
1995 D90
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D90 cold start problems

Anyone experience this?

My D90 seems like it does not get the right air /fuel mixture on occasion when starting cold.

When this happens, it will be VERY hard to start and once running, will have very little power.

Once hot, it cleans out and runs fine.

It starts hot quite easily and even starts most times cold quite easily with a high idle for a little while.

What is the most likely suspect -- a temp sensor?
And help would be appreciated.
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  #2  
Old November 18th, 2012, 08:08 PM
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leastonce
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Jason England
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There are 2 temp sensors on a D90. One for the gauge and one for the ecu. If there is a problem with the coolant sensor the ecu uses a 'default' value which allows the truck to limp home.

Sounds to me that either the coolant sensor is disconnected or is faulty.
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  #3  
Old November 19th, 2012, 12:35 AM
MonLand
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Loic Fabro
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Quote:
Originally Posted by aquamanaquaman
Anyone experience this?

My D90 seems like it does not get the right air /fuel mixture on occasion when starting cold.

When this happens, it will be VERY hard to start and once running, will have very little power.

Once hot, it cleans out and runs fine.

It starts hot quite easily and even starts most times cold quite easily with a high idle for a little while.

What is the most likely suspect -- a temp sensor?
And help would be appreciated.
When cold, what happens if you drive up 20-30mph and put it in neutral (while moving)?
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  #4  
Old November 25th, 2012, 05:03 PM
aquamanaquaman
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Mark
1995 D90
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Thanks for the feedback. That was my thought s well. When cold, most often it will run properly (i.e. idle at high idle in neutral). When the issue arises, it will die when cold when coasting.
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