Hey folks, I'm right around the 95K mile mark and have recently developed a slight issue. Idles fine, no problems under moderate/heavy throttle, but at low speeds from 1100-1600 RPM the truck has started to stumble slightly, and the RPM will drop quickly, but recover equally fast. The hesitations will occur as long as I am in this speed/RPM range, as soon as I speed up it's fine, regardless of gear. It may be occurring at higher speeds in the same RPM range, but is not as noticeable. My gut tells me it may be a bad O2 sensor, but I don't know if spark plugs, dirty TB/PCV/air filter (very dirty) etc. would have this effect. Thanks for any guidance.
Hey folks, I'm right around the 95K mile mark and have recently developed a slight issue. Idles fine, no problems under moderate/heavy throttle, but at low speeds from 1100-1600 RPM the truck has started to stumble slightly, and the RPM will drop quickly, but recover equally fast. The hesitations will occur as long as I am in this speed/RPM range, as soon as I speed up it's fine, regardless of gear. It may be occurring at higher speeds in the same RPM range, but is not as noticeable. My gut tells me it may be a bad O2 sensor, but I don't know if spark plugs, dirty TB/PCV/air filter (very dirty) etc. would have this effect. Thanks for any guidance.
From what you wrote it sounds like you have a coil dropping out on you in that set range without a check engine light to guide you
Or a scanner to see what is happening your kinda stuck as to pinpointing it
Try turning your key from off to on 3 times ending at on without starting truck and look at the odo and see if it gives you any P codes if it does and they are P0300-P0308 they are misfires
I've been out of the truck game for a little while now and it's starting to show. I hooked up the SCT to pull the code(s) and P0058 (unknown to SCT) was the only one to show. The truck has thrown this code since I put the cam in several years and many thousands of miles ago, but this is the first drivability issue I've had since getting the tuning sorted out. This makes me wonder if there's some mechanical foul-up somewhere that isn't being picked up by a sensor.
Looking online, P0058 indicates my passenger side, downstream O2 sensor is likely toast. When installing the ORY I didn't want to fool with spacers, etc, so I just zip-tied this sensor out of the exhaust and out of the way since only the upstream O2's are responsible for air/fuel control. May go ahead and replace it in hopes the code will go away, but I digress.
That's a heater code for sure b2s2 heater fault 98% of the time the sensor is the issue
As for the stumble issue that's gonna be tricky without codes or a constant miss if you drive can you try a stay in that rpm and get it to act up for about 15sec the engine light will likely
Be triggered for a fault if doing it for a little bit
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