My 19 Tahoe generally runs great. Has good plugs, air filter, etc. I notice when I first drive in my neighborhood, there seems to be a little roughness. Once I get on the main road and drive a couple miles, it runs perfect. I know on my older 04 that there was an issue with the intake gasket getting hard and leaking when cold but when warm, it wasn't an issue. i wonder if this is an issue with newer 5.3's. Any ideas?
Little rough when cold
- Thread starter gapost
- Start date
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the highlander
Member
- Joined
- Oct 21, 2017
- Posts
- 41
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I have this "issue". I honestly think that there is just not enough turbulence and fuel doesn't evaporate properly when cold...
My leakdown was within 1-2% on all cylinders (155k miles).
New plugs
New Wires
New coils
tune is just perfect.
My leakdown was within 1-2% on all cylinders (155k miles).
New plugs
New Wires
New coils
tune is just perfect.
The coolant temp sensor tells the computer the engine temperature. What happens when you do a cold start and warm up drive, with the sensor unplugged? Have you cleaned the throttle bore and the MAF? I am assuming that there is no CEL, correct?
