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Old 04-05-2012, 11:52 AM   #1
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Unhappy Idling issues with my 1990 MX5

Hi all,

I have an turbo car running on E85 with a Haltech ECU.

The car runs great when driving BUT idling is a problem.

The car will cut out if the idle is set lower than about 1500 rpm. So currently thats how she runs.

That said, E85 delivers less MPG than regular gasoline so I would like to be able to get a solid idle at a normal level (say 800-1000 rpm).

My local tuning guys (FullBlown in Apple Valley) have tried to get the idle down but it just results in the car cutting out. They have tried changing the settings on the ECU and manually to stop the car from stalling.

Does anyone have any ideas what to do here?

If I have to have a car that idles at 1500-1750 so be it but I would love to get it down to normal and save fuel.

Thanks all

Mark (Technically useless LOL )
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Old 04-09-2012, 10:16 PM   #2
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What size injectors do you have? Do you have this when the engine is hot, cold, or all the time?

Last edited by kidrabbit84; 04-09-2012 at 11:04 PM.
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Old 04-09-2012, 10:30 PM   #3
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datalog and mess around with the idle, watch for a common occurances happening in the datalogs.
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Old 04-09-2012, 10:33 PM   #4
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Hi there I have 1000cc injectors and the idle is always a problem :(
Where are you based?
Thanks

Mark
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Old 04-09-2012, 10:34 PM   #5
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which fuel injectors, model, type, etc?
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Old 04-09-2012, 11:03 PM   #6
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Not sure but can tell you tomorrow. Thanks for your help/ interest
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Old 04-09-2012, 11:07 PM   #7
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Quote:
Originally Posted by supercrewe View Post
Where are you based?
Denver.

+1 on posting logs. What does it do before it dies? Rich, lean,shut off cold?
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Old 04-09-2012, 11:08 PM   #8
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It slowly drops and dies :(
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