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Random hesitation after hot start-up


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My truck has a dead spot in accelerating about 3-4 seconds at about 2000-2500 rpms. I have only noticed it after start-ups not long after it was turned off. It freaked my out today as I was pulling out onto a busy highway and it just idled across both lanes of oncoming traffic. :crackup: The truck has 64k miles.

 

I had it to the Chevy dealer and they changed the fuel filter, cleaned/serviced the fuel injection system and upgraded the computer for better performance/fuel economy. The trucks gives no codes to help diagnose the problem.

 

What should I try next?

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