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Old 10-06-2009, 07:36 AM   #1
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Default Hard to start cold

I'm having this problem where the car doesn't like to start when its about 50F or below, what I have to do is hold my foot on the gas or else it dies in about 2 seconds, I looked at all the warmup tables in HP Tuners and everything looked stock, does something need to be adjusted because of the supercharger being added?
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Old 10-06-2009, 08:06 AM   #2
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Have you ever checked your air fuel ratio? Being a custom tune you really need to get a wide band AFR gauge. Pull your plugs and look them over. Are they gray or black?
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Old 10-06-2009, 10:18 AM   #3
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Well I think its only when it'* warming up that it tuns rough, unfortunately whenever its totally cold I don't have time to pull out the scanner and laptop to check the commanded AFR, once it warms up it is totally fine, same for it I restart it when it is warm
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Old 10-06-2009, 10:28 AM   #4
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the best thing is to log a scan. Start scanning with the key ON, then start and let run. This will give you an idea of what is going on
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Old 10-06-2009, 04:18 PM   #5
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ok, I'll try to find a time when the car is totally cold and I have a few minutes to log it
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Old 10-07-2009, 09:19 PM   #6
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had a small delay with a ruptured fuel line, hopefully I will be able to scan on saturday
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Old 10-14-2009, 10:46 PM   #7
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bump

what is the possibility of the IAC failing and not throwing a code? sometimes I hear it kick in and then when it doesn't I have to hold my foot on the gas until it warms up to ~200F then turn off then on then off again and then start and I'm good to go
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Old 10-15-2009, 01:01 AM   #8
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It could be carboned up and sticking. No code then.
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Old 10-15-2009, 07:32 AM   #9
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that might be it, from when it was running rich when I had the misfire

how do I clean it?
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Old 10-15-2009, 07:59 AM   #10
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You'd take it off and clean the nose of it with some TB cleaner, then spray a rag and wipe out the hole in the TB where it seals.
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