Cold Start Problem
12-10-2008, 11:11 PM
#1
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Cold Start Problem My tune had been working well until temps got into the 30's and 40's at night. When I start up in the mornings the wideband reads in the 11's and
12's for about the first minute or two until the car starts to warm up some. During that time the car doesn't run well. Then the AFR goes to normal and things are fine after that. Is there an easy way to fix this? I have HP Tuners. Thanks.
12's for about the first minute or two until the car starts to warm up some. During that time the car doesn't run well. Then the AFR goes to normal and things are fine after that. Is there an easy way to fix this? I have HP Tuners. Thanks.
12-10-2008, 11:38 PM
#2
Check and make sure both the coolant temp sensor and IAT sensor are reading properly and proportionally to the outside air temp.
If the coolant temp sensor is saying its warmer than the actual air temp is, you will have cold start driveability problems.
If the coolant temp sensor is saying its warmer than the actual air temp is, you will have cold start driveability problems.
12-11-2008, 12:32 AM
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That's probably part of the reason for the situation. The car is garaged at night and the coolant temp is probably in the 50's when I pull out of the garage--whereas the air temp is in the 30s now.
12-11-2008, 01:53 AM
#4
I have the same issue only my car isn't garaged so the coolant is probably air temp outside. could it be a bad IAT? from what I can tell, it reads spot on just about all the time...
