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Kevin, Auto Mechanic
Category: Chevy
Satisfied Customers: 1952
Experience:  Diagnostic technician
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I have a 99 Chevrolet with a 5.3 engine Silverado I change

Customer Question

I have a 99 Chevrolet with a 5.3 engine Silverado I change the upper plastic plenum intake put a new one of them on my truck runs rough has codes misfire MAP sensor oxygen sensor change map sensor what do you think problem is
Submitted: 1 year ago.
Category: Chevy
Expert:  Kevin replied 1 year ago.

Hi im kevin it sounds like you have an air leak spray carb cleaner on all the joints that have been disturbed and see if engine sound changes if it does then you have a gasket leaking