cold idle stall then hard to start

Printable View

02-12-2011, 12:15 AM
mrfister

cold idle stall then hard to start

I'm having an issue with my truck, when its cold *35 or lower it starts and drives OK idle is a little rough at first no stalling though. When the temp is above 45 or so it wants to idle all over the place. My driveway 20 feet out of the garage is a 15 foot rise up to the rest of the drive,it drops about 4 feet in those 15 feet. in the colder temp. it does just fine going over it, in the warmer temps it stalls every time as soon as I throttle off no matter how you feather it or anything else and is then has a long crank time crappy idle and most always stalls at least one more time. After that it's fine. The last week has been great for seeing what changes in weather do to my truck yesterday it was 78 and today 33 with a wind chill of around 19-20.
Also I have been adjusting the throttle cracker b/c it wants to pull it's self. I have adj. it so many times it's crazy. Sorry I can't upload my tune file it says it is an invalid file.:(
02-12-2011, 12:58 AM
pl4yboy

Quote:

Originally Posted by mrfister

I'm having an issue with my truck, when its cold *35 or lower it starts and drives OK idle is a little rough at first no stalling though. When the temp is above 45 or so it wants to idle all over the place. My driveway 20 feet out of the garage is a 15 foot rise up to the rest of the drive,it drops about 4 feet in those 15 feet. in the colder temp. it does just fine going over it, in the warmer temps it stalls every time as soon as I throttle off no matter how you feather it or anything else and is then has a long crank time crappy idle and most always stalls at least one more time. After that it's fine. The last week has been great for seeing what changes in weather do to my truck yesterday it was 78 and today 33 with a wind chill of around 19-20.
Also I have been adjusting the throttle cracker b/c it wants to pull it's self. I have adj. it so many times it's crazy. Sorry I can't upload my tune file it says it is an invalid file.:(

Where is your TPS at idle?
02-12-2011, 10:53 AM
mrfister

You know It never dawned on me to look. I will find out though. Thank you very much.
02-13-2011, 01:45 AM
pl4yboy

Adjusting the "throttle cracker" is going to screw with your TPS is why I ask.
02-14-2011, 08:52 PM
mrfister

Well I don't know how or why, but my problem was my over speed table got changed from negative #'s to positive, reentered the - in front of all the #'s and is back to perfect. Well as perfect as a large cammed ls can be.