stumble when first start driving cold
2002 XG350L with 42,000 miles has stumble when first strarting
driving. Car starts fine, revs up, idle drops down then I put it in gear to drive. Car starts to bog as if it is going to die then takes off. This is every day lately. Once warmed up runs fine. I have tried a bottle of CHevron's Techron but did not help. Any ideas HyundaiTech? |
Re: stumble when first start driving cold
Dunno. If you've got a check engine lamp, you should start there.
But I'm presuming you don't. Try reinitializing the throttle: Turn the key on (don't start the car) and back off immediately and wait ten seconds. Your throttle will do a sweep. Also do an idle learn. Start the car with the a/c on and let it reach operating temperature. Let it run for 10 more minutes. Then turn the a/c off and let it run for another ten minutes. |
Re: stumble when first start driving cold
hyundaitech wrote:
> Dunno. If you've got a check engine lamp, you should start there. > > But I'm presuming you don't. Try reinitializing the throttle: Turn the > key on (don't start the car) and back off immediately and wait ten > seconds. Your throttle will do a sweep. Is there any indication that the throttle sweep has been completed? Is there a beep or any dashboard light indication? Matt |
Re: stumble when first start driving cold
Idle learn? Never heard of that. I did try the sweep but it didn't
help. With the idle learn I just leave it idling the whole time? |
Re: stumble when first start driving cold
Unfortunately, no. The only way you'd know for certain is to have someone
listen or watch under the hood while you try to make it happen. |
Re: stumble when first start driving cold
Yep, just leave it idling. It'll watch and learn where it needs to leave
the throttle plate for proper idle rpm. |
Re: stumble when first start driving cold
Is it safe to clean the throttle plate with cleaner? Engine running or
not? I know a lot of cars can be harmed if this is not done properly (ruin O2 sensors, remove coatings, set trouble codes, etc). Also, thanks for all the assistance on here. Your feedback and advice is invaluable! |
Re: stumble when first start driving cold
It's okay to clean the throttle plate with carb cleaner (while not
running). |
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