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I have a 2000 Silverado 2500 6.0 that is having some hesitation/cutting out on acceleration. It’s weird it seems like if you ease into the throttle it doesn’t cut out but if you mash on the gas it acts like it wants to die. It does it in park and in drive. First noticed it when I was pulling my boat out of the lake and I could barely make it up the boat ramp, it was spitting in sputtering until it eventually seems like it cleared up and started going normal. I replaced the spark plugs, spark plug wires, fuel pump, fuel filter, ran seafoam through the gas, and change the air filter but it seems to not of helped there’s also no check engine light. What could be the issue, thanks!
I am hoping that you can help me diagnose what is causing a hesitation on my truck when accelerating from a stop. It sometimes also hesitates when shifting at low speeds 10-30mph
2014 silverado 1500 WT 4.3L V6 locking rear end 32,000 miles no codes, using bluedriver scanner red
two weeks ago truck took two tries to start never done this before has not happened again last week truck started hesitating on acceleration from stop every time rpms drop from 1500ish to 500ish and then jump back up and truck accelerates I have attached one of the drive logs where you can see the fuel rail pressure drastically change when the engine rpm drops You can see the seven times the truck hesitated at the drops in the graph Started logging other items to see what is happening and found this spike in the temp sensor, attached picture also. intake temp sensor is yellow line and engine rpm is blue line. I highly doubt the temperature actually went from 55F to 135F during my commute.
What I have done
Checked transmission fluid, truck level and hot. Fluid in the dashed good zone between the holes. No burnt smell. Found the strange temp reading. Truck off Unplugged the mass air flow sensor and drove around large parking lot. Hesitation completely gone truck drive normally for 5 min. Check engine light off. Truck off Plug in mass air flow sensor and drive around parking lot again. Hesitation back Check engine light on with codes for MAF unplugged. Thought MAF was the issue. Bought new MAF and air filter Installed MAF and air filter Problem gone on test drive for 15min, truck fine, no codes. Next day, hesitation is back, no codes Realize I need help. Post on forum.
I'm sure I have left out some important information, just let me know and I'll try to answer.
I greatly appreciate the help. Thank you.
After going through a Lemon Law case, and loosing, because of hesitation in my 2018 GMC Z71 1500, I learned a lot about what's going on. The BOTTOM-LINE - GM is intentionally detuning our trucks. This is undisputable.
During the deposition phase, GM acknowledge they are intentionally detuning the trucks in an attempt to save approximately 1-2 mpg.
What was I experiencing:
Hesitation when in Active Fuel Management mode. Hesitation when lightly pushing on the gas When pressing on the accelerator peddle the power was delayed getting to the rear wheels When getting on the gas pedal immediately after braking, there is a HUGE delay When lightly pressing on the accelerator pedal, the RPMs actually go DOWN (WTF???) When going 30 mph the vehicle is already in 6th gear and lugging. This one detuning trick, turns your 350hp vehicle into a Subaru. Extremely slow transmission control to shift into a lower gear. Extremely fast transmission control to shift into a higher gear.
So, after loosing, what did I do to fix these issues? I paid to have the truck re-tuned. I waited to almost 60,000 miles when the warranty expired. I am kicking myself for not doing it sooner. I am not affiliated with this guy at all, but I will tell you LEW at diablewtune.com fixed 95% of the issues and I can FINALLY enjoy the drivability of the vehicle, as I would have designed it. It actually pulls hard from a dead stop. I can actually smoke the tires if I wanted. YES, performance over economy in every situation ... finally!
So for all you potential buyers out there, don't waste your time. Drive it off the lot and don't hesitate like the truck hesitates and give your vehicle a performance tune immediately.
By Manny Montes
So, I had installed a 3.5 inch knuckle lift kit by Rough Country. I have had no problems at all with the kit. The trucks drives well and I clear 285 18 tires on -24 offset wheels. The thing is that I do take this truck on adventures on light trails and into the mountains for weekend activities. The performance is great buy I have a 2" nose dive due to a brush guard and winch weighing around 250ibs. This approximate 2 inch and a 1/4 really bothers me because I love the leveled stance. I have an offroad shop that will be installing lower strut spacers on my build. Has anyone had issues with this. My knuckle kit has nearly eliminated any stress on the ball joints, and the CV axle clears. I just have some concerns but really want the truck levelled.
Just got the 2014 Silverado 5.3l 4x4 back from the dealership from having the entire top end of the engine replaced ($9000+) at 106,000 miles. Noticed oil on the plugs & immediately started smoking. But NOW - 5 days later, the truck shudders at 35-50 mph, especially if going uphill at a low speed. Does anyone have any suggestions for what this is due to or how to correct it - preferably without spending another $5-10k.
This was a great truck up to 100k miles, but now it seems to be falling apart. Put a Hypertech programmer on it in late 2017/early 2018 to turn off the afv, (at about 70k miles & that's all I used it for), hoping to avoid the problems that causes, but no luck. Now this transmission thing is happening. It used to shift hard at low speed & when cold, but this shuddering is new.
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