Re: 5.3l stumbling, bad gas smell on passenger side
pull the injectors and soak them in seafoam, just try to keep the electrical part out of it.
Or heck just pull an injector and crank it and see if it sprays, or just dumps open.
I still have my money on stuck injector.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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