S&B CAI bogging/hesitation

[rgirk4]

I recently installed an S&B CAI on my 2020 silverado 1500 5.3L V8 trail boss. Ive had it in for about 2 weeks now with no issues. Suddenly I have noticed that when on the highway in the 72-75mph range with rpms sitting around 1600-1800rpm I get a slight "bog or hesitation" that you can hear and feel. Its not major but the rpms do dip and its almost like you let off the gas. Ive done research on what the cause is from the MAF sensor to cylinders misfiring, system getting too much air etc. Have only noticed this when I installed the CAI which makes me think it has something to do with the intake, but wanted to post here before taking it out and re installing the stock intake. 

[Anacortes Army Guy]

8 hours ago, rgirk4 said:

I recently installed an S&B CAI on my 2020 silverado 1500 5.3L V8 trail boss. Ive had it in for about 2 weeks now with no issues. Suddenly I have noticed that when on the highway in the 72-75mph range with rpms sitting around 1600-1800rpm I get a slight "bog or hesitation" that you can hear and feel. Its not major but the rpms do dip and its almost like you let off the gas. Ive done research on what the cause is from the MAF sensor to cylinders misfiring, system getting too much air etc. Have only noticed this when I installed the CAI which makes me think it has something to do with the intake, but wanted to post here before taking it out and re installing the stock intake. 

I assume the S&B CAI uses an oiled filter?  If so, was it pre-oiled when you got it or did you have to oil it?  The reason I ask is that the MAF sensors are sensitive to being contaminated by excess oil on a CAI filter.  Before I installed the GM Performance CAI on my truck, which uses a dry filter, I was considering installing a Cold Air Inductions CAI, and that company's instructions on how to oil its filter were very specific about the process and letting it sit for 24 hours to drain any excess oil before installing.  Long story short, I'd recommend getting a can of MAF sensor cleaner (and ONLY MAF sensor cleaner) from the auto parts store and clean your MAF - very carefully as it's fragile, then reinstall it and see if that helps.  

[rgirk4]

Yes, it is an oiled filter that came pre oiled. I opted for the oiled reusable filter Vs the paper one. I will get some MAF cleaner and up date. Thanks for the suggestion

[Spyderwebb]

I've ran oil'd filters for years with no issues.  I have always found the initial factory oiling is good, people tend to have issues after cleaning and not properly drying and...then "lightly" oiling it again. 

 

Unless it was dripping with oil I don't think that's your problem.    Tripple check the seal points & clamps of the intake and clean the sensors. 

 

Good luck!

Edited February 23, 2022 by Spyderwebb

[RPaul]

Stupid question but are you just hearing the new sound of the S&b? It makes a weird deep growl when lightly accelerating while cruising 

[rgirk4]

On 2/26/2022 at 7:48 PM, RPaul said:

Stupid question but are you just hearing the new sound of the S&b? It makes a weird deep growl when lightly accelerating while cruising 

Yes I do here a change in sound when accelerating. Nothing too major but definitely a difference. 

[Sntos20RST]

Mine is doing the same thing. I’ve been told that I need to have the air/fuel ratio adjusted. Too much air and starving it now. But I did swap to a ported intake manifold and TB also. But yeah it’s doing the same thing just like that. 

[black00ta]

Did you do a battery disconnect when you installed the new air intake? If you install the factory intake and the condition continues then you know it is not the intake itself. At this point cleaning the maf sensor on a whim is not suggested as you'll likely introduce another variable into this equation. Just my .02